Catalyst component for olefin polymerization, catalyst, and use thereof

Abstract

Disclosed is a catalyst component for olefin polymerization. The catalyst component comprises magnesium, titanium, halogen and an internal electron donor. The internal electron donor includes an imine compound with a ketone group as shown in Formula I. Disclosed further is a method of preparing the catalyst component, and a catalyst for olefin polymerization containing the catalyst component. When the catalyst is used in olefin polymerization reaction especially propene polymerization reaction, the catalyst has a high activity and a long term activity and good hydrogen response, and the obtained polymer has characteristics of an adjustable isotactic index and a relatively wide molecular weight distribution. ##STR00001##

Claims

1. A catalyst component for olefin polymerization, comprising magnesium, titanium, halogen, and an internal electron donor, wherein the internal electron donor comprises an imine compound having a ketone group selected from: ##STR00009## ##STR00010## ##STR00011## ##STR00012## ##STR00013## ##STR00014## ##STR00015##

2. The catalyst component according to claim 1, wherein based on the weight of the catalyst component, a content of magnesium is in a range of 5 wt %-50 wt %, a content of titanium is in a range of 1.0 wt %-8.0 wt %, a content of halogen is in a range of 10 wt %-70 wt %, and a content of the internal electron donor is in a range of 0.1 wt %-20 wt %.

3. The catalyst component according to claim 1, wherein the internal electron donor further comprises at least one additional electron donor compound, which is one, two, or three selected from the group consisting of aromatic carboxylate ester compounds, diol ester compounds, and diether compounds.

4. The catalyst component according to claim 3, wherein a molar ratio of the imine compound having a ketone group to the additional electron donor compound is in a range of 1:(0.05-20).

5. The catalyst component according to claim 4, wherein the molar ratio of the imine compound having a ketone group to the additional electron donor compound is in a range of 1:(0.1-10).

6. The catalyst component according to claim 3, wherein the aromatic carboxylate ester compound is as shown in Formula II, ##STR00016## wherein, in Formula II, R.sup.I is C.sub.1-C.sub.20 alkyl with or without a halogen atom substitute, C.sub.2-C.sub.20 alkenyl with or without a halogen atom substitute, C.sub.2-C.sub.20 alkynyl with or without a halogen atom substitute, or C.sub.6-C.sub.30 alkylaryl with or without a halogen atom substitute; R.sup.II is C.sub.1-C.sub.20 alkyl, C.sub.2-C.sub.20 alkenyl, C.sub.2-C.sub.20 alkynyl, or C.sub.6-C.sub.30 alkylaryl or ester group or amido group; R.sup.III, R.sup.IV, R.sup.V, and R.sup.VI are identical to or different from each other, each independently selected from the group consisting of C.sub.1-C.sub.20 alkyl, C.sub.2-C.sub.20 alkenyl, C.sub.2-C.sub.20 alkynyl, C.sub.1-C.sub.20 alkoxy, C.sub.6-C.sub.30 arylalkyl, C.sub.6-C.sub.30 alkylaryl, C.sub.9-C.sub.40 fused aryl, and halogen; the diol ester compound is as shown in Formula III, ##STR00017## wherein, in Formula III, each of X and Y is independently selected from the group consisting of carbon, oxygen, sulfur, nitrogen, boron, and silicon; R.sup.1 and R.sup.2 are identical to or different from each other, each independently selected from the group consisting of halogen, alkyl, cycloalkyl, aryl, alkenyl, fused aryl, and ester group; R.sup.3-R.sup.6 are identical to or different from each other, each independently selected from the group consisting of hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, substituted or unsubstituted alkenyl, substituted or unsubstituted fused aryl, and substituted or unsubstituted ester group; R.sup.I-R.sup.IV are identical to or different from each other, each independently selected from the group consisting of hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, substituted or unsubstituted alkenyl, substituted or unsubstituted fused aryl, and substituted or unsubstituted ester group; R.sup.3-R.sup.6 and R.sup.I-R.sup.IV each optionally contains one or more heteroatoms as a substitute of a carbon or hydrogen atom or both, the heteroatom being oxygen, sulfur, nitrogen, boron, silicon, phosphorus, or a halogen atom; one or more of R.sup.3-R.sup.6, and R.sup.I to R.sup.IV are optionally bonded together to form a ring; and n is an integer ranging from 1 to 10; and/or the diether compound is as shown in Formula IV, ##STR00018## wherein, in Formula IV, R′ and R″ are identical to or different from each other, each independently selected from the group consisting of C.sub.1-C.sub.20 hydrocarbyl; n is an integer ranging from 0 to 6; R.sup.I-R.sup.IV are identical to or different from each other, each independently selected from the group consisting of hydrogen, alkoxy, substituted amino, halogen atoms, C.sub.1-C.sub.20 hydrocarbyl, and C.sub.6-C.sub.20 aryl, and two or more of R.sup.I-R.sup.IV are bonded together to form a ring.

7. The catalyst component according to claim 6, wherein in Formula II, R.sup.I is selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, ethenyl, allyl, ethynyl, phenyl, halogenated phenyl, alkyl-substituted phenyl, naphthyl, or biphenyl; and/or, R.sup.II is selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl, ethenyl, allyl, ethynyl, phenyl, halogenated phenyl, alkyl-substituted phenyl, naphthyl, biphenyl, ethoxycarbonyl, propoxycarbonyl, isopropoxycarbonyl, butoxycarbonyl, isobutoxycarbonyl, hexoxycarbonyl, isohexoxycarbonyl, neohexoxycarbonyl, heptyloxycarbonyl, isoheptyloxycarbonyl, neoheptyloxycarbonyl, octyloxycarbonyl, isooctyloxycarbonyl, and neooctyloxycarbonyl.

8. The catalyst component according to claim 6, wherein the diol ester compound is as shown Formula IIIa: ##STR00019## wherein in Formula IIa, R.sup.1, R.sup.2 and R.sup.3-R.sup.6 are identical to or different from each other, each independently selected from the group consisting of C.sub.1-C.sub.20 alkyl, C.sub.3-C.sub.20 cycloalkyl, C.sub.2-C.sub.20 alkenyl, C.sub.6-C.sub.30 arylalkyl, C.sub.6-C.sub.30 alkylaryl, C.sub.9-C.sub.40 fused aryl and ester group; R.sup.I and R.sup.II are identical to or different from each other, each independently selected from the group consisting of hydrogen, C.sub.1-C.sub.20 alkyl, C.sub.3-C.sub.20 cycloalkyl, C.sub.2-C.sub.20 alkenyl, C.sub.6-C.sub.30 arylalkyl, C.sub.6-C.sub.30 alkylaryl, C.sub.9-C.sub.40 fused aryl and ester group; R.sup.3-R.sup.6 and R.sup.I-R.sup.IV each optionally contains one or more heteroatoms as a substitute of a carbon or hydrogen atom or both, the heteroatom being oxygen, sulfur, nitrogen, boron, silicon, phosphorus, or halogen atom; and one or more of R.sup.3-R.sup.6, R.sup.I, and R.sup.II are optionally bonded to form a ring; n is an integer ranging from 1 to 5.

9. The catalyst component according to claim 8, wherein the diol ester compound is as shown in Formula IIb: ##STR00020##

10. The catalyst component according to claim 6, wherein in at least one of Formula III, Formula IIIa, and Formula IIIb, each of R.sup.1 and R.sup.2 is independently selected from the group consisting of methyl, ethyl, n-propyl, isoproplyl, n-butyl, isobutyl, sec-butyl, tert-butyl, pentyl, hexyl, hydroxyalkyl, phenyl, halogenated phenyl, alkyl-substituted phenyl, naphthyl, biphenyl, and a heterocycle-containing group selected from a pyrrole-containing group, a pyridine-containing group, pyrimidine-containing group, and a quinoline-containing group.

11. The catalyst component according to claim 6, wherein, in Formula III, each of R.sup.I and R.sup.II is independently selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, pentyl, hexyl, hydroxyalkyl, phenyl, halogenated phenyl, and alkyl-substituted phenyl.

12. The catalyst component according to claim 3, wherein the aromatic carboxylate ester compound is one or more selected from the group consisting of ethyl benzoate, propyl benzoate, butyl benzoate, pentyl benzoate, hexyl benzoate, heptyl benzoate, octyl benzoate, nonyl benzoate, decyl benzoate, isobutyl benzoate, isopentyl benzoate, isohexyl benzoate, isoheptyl enzoate, isooctyl benzoate, isononyl benzoate, isodecyl benzoate, neopentyl benzoate, neohexyl benzoate, neoheptyl benzoate, neooctyl benzoate, neononyl benzoate, neodecyl benzoate, diethyl phthalate, dipropyl phthalate, diisobutyl phthalate, di-n-butyl phthalate, di-n-pentyl phthalate, diisopentyl phthalate, dineopentyl phthalate, dihexyl phthalate, diheptyl phthalate, dioctyl phthalate, dinonyl phthalate, diisohexyl phthalate, diisoheptyl phthalate, diisooctyl phthalate, diisononyl phthalate, diisobutyl 3-methylphthalate, di-n-butyl 3-methylphthalate, diisopentyl 3-methylphthalate, di-n-pentyl 3-methylphthalate, diisooctyl 3-methylphthalate, di-n-octyl 3-methylphthalate, diisobutyl 3-ethylphthalate, di-n-butyl 3-ethylphthalate, di-n-octyl 3-ethylphthalate, diisobutyl 3-ethylphthalate, di-n-pentyl 3-ethylphthalate, diisopentyl 3-ethylphthalate, diisobutyl 3-propylphthalate, di-n-butyl 3-propylphthalate, diisobutyl 3-chlorophthalate, diisobutyl 3-butylphthalate, di-n-butyl 3-butylphthalate, di-n-butyl 4-butylphthalate, diisobutyl 4-propylphthalate, diisopentyl 4-butylphthalate, di-n-butyl 4-chlorophthalate, diisobutyl 4-chlorophthalate, di-n-octyl 4-chlorophthalate, di-n-butyl 4-methoxyphthalate, and diisobutyl 4-methoxyphthalate; and/or the diether compound is one or more selected from the group consisting of 2-isopropyl-1,3-dimethoxypropane, 2-butyl-1,3-dimethoxypropane, 2-cyclohexyl-1,3-dimethoxypropane, 2-benzyl-1,3-dimethoxypropane, 2-phenyl-1,3-dimethoxypropane, 2-(1-naphthyl)-1,3-dimethoxypropane, 2-isopropyl-2-isopentyl-1,3-dimethoxypropane, 2-isopropyl-2-isobutyl-1,3-dimethoxypropane, 2-isopropyl-2-butyl-1,3-dimethoxypropane, 2,2-dicyclopentyl-1,3-dibenzoyloxypropane, 2,2-dicyclohexyl-1,3-dimethoxypropane, 2,2-dibutyl-1,3-dimethoxypropane, 2,2-diisobutyl-1,3-dimethoxypropane, 2,2-diisopropyl-1,3-dimethoxypropane, 2,2-diethyl-1,3-dimethoxypropane, 2-ethyl-2-butyl-1,3-dimethoxypropane, 2,4-dimethoxypentane, 3-ethyl-2,4-dimethoxypentane, 3-methyl-2,4-dimethoxypentane, 3-propyl-2,4-dimethoxypentane, 3-isopropyl-2,4-dimethoxypentane, 3,5-dimethoxyheptane, 4-ethyl-3,5-dimethoxyheptane, 4-propyl-3,5-dimethoxyheptane, 4-isopropyl-3,5-dimethoxyheptane, 9,9-dimethoxymethylfluorene, 9,9-dimethoxymethyl-4-tert-butylfluorene, 9,9-dimethoxymethyl-4-propylfluorene, 9,9-dimethoxymethyl-1,2,3,4-tetrahydrofluorene, 9,9-dimethoxymethyl-1,2,3,4, 5, 6, 7, 8-octahydrofluorene, 9,9-dimethoxymethyl-2,3,6,7-diphenylpropylindene, 9,9-dimethoxymethyl-1,8-dichlorofluorene, 7,7-dimethoxymethyl-2,5-norbornadiene, 1,4-dimethoxybutane, 2,3-diisopropyl-1,4-dimethoxybutane, 2,3-dibutyl-1,4-dimethoxybutane, 1,2-dimethoxybenzene, 3-ethyl-1,2-dimethoxybenzene, 4-butyl-1,2-dimethoxybenzene, 1,8-dimethoxynaphthalene, 2-ethyl-1,8-dimethoxynaphthalene, 2-propyl-1,8-dimethoxynaphthalene, 2-butyl-1,8-dimethoxynaphthalene, 4-butyl-1,8-dimethoxynaphthalene, 4-isobutyl-1,8-dimethoxynaphthalene, 4-isopropyl-1,8-dimethoxynaphthalene, and 4-propyl-1,8-dimethoxynaphthalene.

13. A catalyst for olefin polymerization, comprising: A) the catalyst component according to claim 1; B) an organoaluminium compound; and optionally, C) an organosilicon compound.

14. The catalyst according to claim 13, wherein the olefin is propene.

15. A method for olefin polymerization, comprising polymerizing an olefin feedstock in presence of the catalyst comprising the catalyst component of claim 1.

16. The method of 15, wherein the olefine feedstock comprises propylene.

17. A method for olefin polymerization, comprising polymerizing an olefin feedstock in presence of the catalyst comprising the catalyst component of claim 13.

Description

DETAILED DESCRIPTION OF THE EMBODIMENTS

(1) The implementing solutions of the present invention will be explained in detail below in conjunction with the embodiments. Those skilled persons in the art shall appreciate that the following embodiments are merely for illustrating the present invention, and shall not be construed as limiting the scope of the present invention. Where specific conditions in an embodiment are not specified, normal conditions or conditions suggested by manufacturers are adopted. Where manufacturers of reagents or instruments are not specified, the reagents or instruments shall be normal products available by purchase from the market.

(2) Testing Methods:

(3) 1. Melt Index (MI) of the Polymer: Melt index of the polymer was measured based on GB/T3682-2000;

(4) 2. Isotactic Index (II) of Propene Polymer: Isotactic index of propene polymer was measured by heptane extraction. 2 g of dry polymer sample was put into an extractor for extraction with boiling heptane for 6 hours. The residue was dried to a constant weight to obtain a residual polymer. The isotacticity of the polymer was a ratio of the weight (g) of the residual polymer to 2 (g).

(5) 3. Molecular Weight Distribution (MWD; MWD=Mw/Mn) of the Polymer: Molecular weight distribution of the polymer was measured at 150° C. using PL-GPC220 and using trichlorobenzene as a solvent (standard sample: polystyrene; flow rate: 1.0 mL/min; column: 3×Plgel 10 um Ml×ED-B 300×7.5 nm).

(6) 4. Activity Calculation: activity of catalyst=(mass of prepared polyolefin)/(mass of solid components of catalyst) g/g.

Example 1A

(7) Synthesis of 6-(phenylimino)ethyl-2-acetylpyridine: 3.26 g of 2,6-diacetylpyridine, 100 mL of isopropanol, and 0.2 mL of glacial acetic acid were placed into a 250 mL three-neck flask replaced by nitrogen gas, and were mixed uniformly by stirring at room temperature, followed by, at room temperature, a slow dropwise addition of 20 mL of isopropanol solution containing 1.96 g of aniline. The resulting mixture was stirred and reacted for 2 hours, and then heated to perform a reflux reaction for 12 hours. The reaction solution was concentrated under reduced pressure, and purified by chromatographic separation, to obtain a product of 2.83 g (the yield was 62%). .sup.1H-NMR (δ, ppm, TMS, CDCl.sub.3): 8.46-8.42 (2H, m, ArH), 7.96-7.93 (2H, m, ArH), 7.32-7.28 (2H, m, ArH), 7.10-7.06 (2H, m, ArH), 2.35-2.32 (3H, s, CH.sub.3), 1.15-1.12 (3H, s, CH.sub.3); mass spectrum, FD-MS: 238.

Example 2A

(8) Synthesis of 6-(4-chlorophenylimino)ethyl-2-acetylpyridine: 1.63 g of 2,6-diacetylpyridine, 80 mL of isopropanol, and 0.2 mL of glacial acetic acid were placed into a 250 mL three-neck flask replaced by nitrogen gas, and were mixed uniformly by stirring at room temperature, followed by, at room temperature, a slow dropwise addition of 20 mL of isopropanol solution containing 1.27 g of aniline. The resulting mixture was stirred and reacted for 2 hours, and then heated to perform a reflux reaction for 18 hours. The reaction solution was concentrated under reduced pressure, and purified by chromatographic separation, to obtain a product of 1.63 g (the yield was 69%). .sup.1H-NMR (δ, ppm, TMS, CDCl.sub.3): 8.44-8.40 (2H, m, ArH), 816-8.14 (1H, m, ArH), 7.46-7.41 (2H, m, ArH), 7.12-7.08 (2H, m, ArH), 2.38-2.34 (3H, s, CH.sub.3), 1.12-1.09 (3H, s, CH.sub.3); mass spectrum, FD-MS: 272.

Example 3A

(9) Synthesis of 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine: 1.63 g of 2,6-diacetylpyridine, 80 mL of isopropanol, and 0.1 mL of glacial acetic acid were placed into a 250 mL three-neck flask replaced by nitrogen gas, and were mixed uniformly by stirring at room temperature, followed by, at room temperature, a slow dropwise addition of 20 mL of isopropanol solution containing 1.78 g of 2,6-diisopropyl aniline. The resulting mixture was stirred and reacted for 2 hours, and then heated to perform a reflux reaction for 12 hours. The reaction solution was concentrated under reduced pressure, and purified by chromatographic separation, to obtain a product of 2.32 g (the yield was 72%). .sup.1H-NMR (δ, ppm, TMS, CDCl.sub.3): 8.45-8.41 (2H, m, ArH), 7.96-7.92 (2H, m, ArH), 7.36-7.34 (2H, m, ArH), 3.22-3.18 (2H, m, CH), 2.27-2.24 (3H, s, CH.sub.3), 1.28-1.24 (6H, m, CH.sub.3), 1.14-1.10 (6H, m, CH.sub.3), 1.10-1.07 (3H, s, CH.sub.3); mass spectrum, FD-MS: 322.

Example 4A

(10) Synthesis of 6-(2,6-dimethylphenylimino)ethyl-2-acetylpyridine: 1.63 g of 2,6-diacetylpyridine, 80 mL of isopropanol, and 0.15 g of p-methylbenzenesulfonic acid were placed into a 250 mL three-neck flask replaced by nitrogen gas, and were mixed uniformly by stirring at room temperature, followed by, at room temperature, a slow dropwise addition of 20 mL of isopropanol solution containing 1.25 g of 2,6-dimethyl aniline. The resulting mixture was stirred and reacted for 2 hours, and then heated to perform a reflux reaction for 10 hours. The reaction solution was concentrated under reduced pressure, and purified by chromatographic separation, to obtain a product of 1.85 g (the yield was 70%). .sup.1H-NMR (δ, ppm, TMS, CDCl.sub.3): 8.22-8.18 (2H, m, ArH), 7.68-7.64 (2H, m, ArH), 7.12-7.08 (2H, m, ArH), 2.30-2.27 (3H, s, CH.sub.3), 2.24-2.21 (3H, s, CH.sub.3), 2.10-2.06 (3H, s, CH.sub.3), 1.02-0.98 (3H, s, CH.sub.3); mass spectrum, FD-MS: 266.

Example 5A

(11) Synthesis of 6-(3-quinolylimino)-2-acetylpyridine: 1.63 g of 2,6-diacetylpyridine, 80 mL of isopropanol, and 0.15 g of p-methylbenzenesulfonic acid were placed into a 250 mL three-neck flask replaced by nitrogen gas, and were mixed uniformly by stirring at room temperature, followed by, at room temperature, a slow dropwise addition of 20 mL of isopropanol solution containing 1.38 g of 2,4,6-trimethyl aniline. The resulting mixture was stirred and reacted for 2 hours, and then heated to perform a reflux reaction for 16 hours. The reaction solution was concentrated under reduced pressure, and purified by chromatographic separation, to obtain a product of 1.82 g (the yield was 65%). .sup.1H-NMR (δ, ppm, TMS, CDCl.sub.3): 8.56-8.53 (3H, m, ArH), 7.95-7.91 (2H, m, ArH), 7.32-7.28 (2H, m, ArH), 7.12-7.08 (2H, m, ArH), 2.35-2.31 (3H, s, CH.sub.3), 1.02-0.98 (3H, s, CH.sub.3); mass spectrum, FD-MS: 289.

Example 6A

(12) Synthesis of 6-(1-naphthylimino)ethyl-2-acetylpyridine: 1.63 g of 2,6-diacetylpyridine, 80 mL of isopropanol, and 0.2 mL of glacial acetic acid were placed into a 250 mL three-neck flask replaced by nitrogen gas, and were mixed uniformly by stirring at room temperature, followed by, at room temperature, a slow dropwise addition of 20 mL of isopropanol solution containing 1.45 g of 1-naphthylamine. The resulting mixture was stirred and reacted for 2 hours, and then heated to perform a reflux reaction for 14 hours. The reaction solution was concentrated under reduced pressure, and purified by chromatographic separation, to obtain a product of 1.96 g (the yield was 68%). .sup.1H-NMR (δ, ppm, TMS, CDCl.sub.3): 8.50-8.46 (1H, m, ArH), 8.36-8.33 (2H, m, ArH), 7.78-7.75 (2H, m, ArH), 7.32-7.28 (2H, m, ArH), 7.12-7.08 (3H, m, ArH), 2.26-2.24 (3H, s, CH.sub.3), 1.08-1.06 (3H, s, CH.sub.3); mass spectrum, FD-MS: 288.

Example 7A

(13) Synthesis of 6-(benzylimino)ethyl-2-acetylpyridine: 3.26 g of 2,6-diacetylpyridine, 120 mL of isopropanol, and 0.3 mL of glacial acetic acid were placed into a 250 mL three-neck flask replaced by nitrogen gas, and were mixed uniformly by stirring at room temperature, followed by, at room temperature, a slow dropwise addition of 30 mL of isopropanol solution containing 2.20 g of benzylamine. The resulting mixture was stirred and reacted for 2 hours, and then heated to perform a reflux reaction for 18 hours. The reaction solution was concentrated under reduced pressure, and purified by chromatographic separation, to obtain a product of 3.43 g (the yield was 70%). .sup.1H-NMR (δ, ppm, TMS, CDCl.sub.3): 8.36-8.34 (2H, m, ArH), 7.96-7.93 (1H, m, ArH), 7.32-7.28 (2H, m, ArH), 7.12-7.08 (3H, m, ArH), 2.62-2.58 (2H, s, CH.sub.2), 2.28-2.25 (3H, s, CH.sub.3), 1.10-1.07 (3H, s, CH.sub.3); mass spectrum, FD-MS: 252.

Example 8A

(14) Synthesis of 6-(8-quinolylimino)ethyl-2-acetylpyridine: 1.63 g of 2,6-diacetylpyridine, 70 mL of isopropanol, and 0.15 g of p-methylbenzenesulfonic acid were placed into a 250 mL three-neck flask replaced by nitrogen gas, and were mixed uniformly by stirring at room temperature, followed by, at room temperature, a slow dropwise addition of 35 mL of isopropanol solution containing 1.48 g of 8-amino quinoline. The resulting mixture was stirred and reacted for 4 hours, and then heated to perform a reflux reaction for 12 hours. The reaction solution was concentrated under reduced pressure, and purified by chromatographic separation, to obtain a product of 1.82 g (the yield was 63%). 8.58-8.53 (3H, m, ArH), 7.98-7.95 (2H, m, ArH), 7.32-7.28 (2H, m, ArH), 7.08-7.05 (2H, m, ArH), 2.28-2.24 (3H, s, CH.sub.3), 1.10-1.06 (3H, s, CH.sub.3); mass spectrum, FD-MS: 289.

Example 9A

(15) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine (0.006 mol) was added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was stirred for 30 minutes, heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane was added, and the resulting mixture was washed twice to obtain a catalyst component of 7.9 g, containing 3.5% Ti, 22.6% Mg, and 51.3% Cl.

Example 10A

(16) Preparation of a catalyst component: The present example was the same as Example 9A, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(4-chlorophenylimino)ethyl-2-acetylpyridine.

Example 11A

(17) Preparation of a catalyst component: The present example was the same as Example 9A, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(8-quinolylimino)ethyl-2-acetylpyridine.

Example 12A

(18) Preparation of a catalyst component: The present example was the same as Example 9A, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(2-naphthylimino)ethyl-2-acetylpyridine.

Example 13A

(19) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, 2,4-dibenzoyloxypentane (0.003 mol) and 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine (0.003 mol) were added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was stirred for 30 minutes, heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane was added, and the resulting mixture was washed twice to obtain a catalyst component of 7.9 g, containing 3.8% Ti, 21.8% Mg, and 50.8% Cl.

Example 14A

(20) Preparation of a catalyst component: The present example was the same as Example 13A, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(p-chlorophenylimino)ethyl-2-acetylpyridine.

Example 15A

(21) Preparation of a catalyst component: The present example was the same as Example 13A, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(8-quinolylimino)ethyl-2-acetylpyridine.

Example 16A

(22) Preparation of a catalyst component: The present example was the same as Example 13A, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(1-naphthylimino)ethyl-2-acetylpyridine.

Example 17A

(23) Preparation of a catalyst component: The present example was the same as Example 13A, except that 2,4-dibenzoyloxypentane was substituted with 9,9-bis(methoxymethyl)fluorine.

Example 18A

(24) Preparation of a catalyst component: The present example was the same as Example 13A, except that 2,4-dibenzoyloxypentane was substituted with DNBP.

Example 19A

(25) Preparation of a catalyst component: 300 mL of TiCl.sub.4 was put into a reactor replaced by high-purity nitrogen, and cooled to −20° C., followed by an addition of 7.0 g of alcohol adduct of magnesium chloride (see patent CN1330086A). The resulting mixture was heated with stirring in stages. When the mixture was heated to 40° C., 2,4-dibenzoyloxypentane (0.003 mol) and 6-(2,6-diisopropylphenylimino)ethyl-2acetylpyridine (0.003 mol) were added. The resulting mixture was kept at 40° C. for 2 hours and then filtered, followed by an addition of 100 mL of TiCl.sub.4. The resulting mixture was heated to 110° C. and treated three times. After that, 60 mL of hexane was added, and the resulting mixture was washed three times to obtain a catalyst component of 7.2 g, containing 2.7% Ti, 20.2% Mg, and 50.4% Cl.

Example 20A

(26) Preparation of a catalyst component: 300 mL of TiCl.sub.4 was put into a reactor replaced by high-purity nitrogen, and cooled to −20° C., followed by an addition of 7.0 g of magnesium ethylate. The resulting mixture was heated with stirring in stages. When the mixture was heated to 40° C., 2,4-dibenzoyloxypentane (0.003 mol) and 6-(2-naphthylimino)ethyl-2-acetylpyridine (0.003 mol) were added. The resulting mixture was kept at 40° C. for 3 hours and then filtered, followed by an addition of 100 mL of TiCl.sub.4. The resulting mixture was heated to 110° C. and treated three times. After that, 60 mL of hexane was added, and the resulting mixture was washed three times to obtain a catalyst component of 6.7 g, containing 3.0% Ti, 20.7% Mg, and 51.3% Cl.

Example 21A

(27) Polymerization reaction of propene: 2.5 mL of AlEt.sub.3 and 5 mL of cyclohexyl methyl dimethoxy silane (CHMMS) enabling Al/Si (mol)=25 were placed into a 5 L stainless reactor replaced fully by propene gas, followed by an addition of 10 mg of the solid component prepared in Example 9A and 1.2 NL of hydrogen gas, and an introduction of 2.5 L of liquid propene. The resulting mixture was heated to 70° C. and maintained at 70° C. for 1 hour, followed by cooling, pressure releasing, and discharging, to obtain a PP resin. Results were shown in Table 1.

Example 22A

(28) Polymerization reaction of propene: The present example was the same as Example 21A, except that the catalyst component was substituted with the catalyst component prepared in Example 10A. Results were shown in Table 1.

Example 23A

(29) Polymerization reaction of propene: The present example was the same as Example 21A, except that the catalyst component was substituted with the catalyst component prepared in Example 11A. Results were shown in Table 1.

Example 24A

(30) Polymerization reaction of propene: The present example was the same as Example 21A, except that the catalyst component was substituted with the catalyst component prepared in Example 12A. Results were shown in Table 1.

Example 25A

(31) Polymerization reaction of propene: The present example was the same as Example 21A, except that the catalyst component was substituted with the catalyst component prepared in Example 13A. Results were shown in Table 1.

Example 26A

(32) Polymerization reaction of propene: The present example was the same as Example 21A, except that the catalyst component was substituted with the catalyst component prepared in Example 14A. Results were shown in Table 1.

Example 27A

(33) Polymerization reaction of propene: The present example was the same as Example 21A, except that the catalyst component was substituted with the catalyst component prepared in Example 15A. Results were shown in Table 1.

Example 28A

(34) Polymerization reaction of propene: The present example was the same as Example 21A, except that the catalyst component was substituted with the catalyst component prepared in Example 16A. Results were shown in Table 1.

Example 29A

(35) Polymerization reaction of propene: The present example was the same as Example 21A, except that the catalyst component was substituted with the catalyst component prepared in Example 17A. Results were shown in Table 1.

Example 30A

(36) Polymerization reaction of propene: The present example was the same as Example 18A, except that the catalyst component was substituted with the catalyst component prepared in Example 18A. Results were shown in Table 1.

Example 31A

(37) Polymerization reaction of propene: The present example was the same as Example 19A, except that the catalyst component was substituted with the catalyst component prepared in Example 19A. Results were shown in Table 1.

Example 32A

(38) Polymerization reaction of propene: The present example was the same as Example 21A, except that the catalyst component was substituted with the catalyst component prepared in Example 20A. Results were shown in Table 1.

Example 33A

(39) Polymerization reaction of propene: The present example was the same as Example 25A, except that the time of the polymerization reaction was extended to 2 hours. Results were shown in Table 1.

Example 34A

(40) Polymerization reaction of propene: The present example was the same as Example 25A, except that the time of the polymerization reaction was extended to 3 hours. Results were shown in Table 1.

Example 35A

(41) Polymerization reaction of propene: The present example was the same as Example 26A, except that the time of the polymerization reaction was extended to 2 hours. Results were shown in Table 1.

Example 36A

(42) Polymerization reaction of propene: The present example was the same as Example 27A, except that the time of the polymerization reaction was extended to 3 hours. Results were shown in Table 1.

Example 37A

(43) Polymerization reaction of propene: The present example was the same as Example 26A, except that the time of the polymerization reaction was extended to 3 hours. Results were shown in Table 1.

Example 38A

(44) Polymerization reaction of propene: The present example was the same as Example 27A, except that the time of the polymerization reaction was extended to 3 hours. Results were shown in Table 1.

Example 39A

(45) Polymerization reaction of propene: The present example was the same as Example 25A, except that the adding amount of hydrogen was changed to 7.2 NL. Results were shown in Table 1.

Example 40A

(46) Polymerization reaction of propene: The present example was the same as Example 29A, except that the time of the polymerization reaction was extended to 2 hours. Results were shown in Table 1.

Example 41A

(47) Polymerization reaction of propene: The present example was the same as Example 29A, except that the adding amount of hydrogen was changed to 7.2 NL. Results were shown in Table 1.

Example 42A

(48) Polymerization reaction of propene: The present example was the same as Example 30A, except that the time of the polymerization reaction was extended to 2 hours. Results were shown in Table 1.

Example 43A

(49) Polymerization reaction of propene: The present example was the same as Example 30A, except that the time of the polymerization reaction was extended to 3 hours. Results were shown in Table 1.

Comparative Example 1A

(50) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, DNBP (0.006 mol) was added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane was added, and the resulting mixture was stirred for 30 minutes. Another 60 mL of hexane was added, and the resulting mixture was washed three times to obtain a catalyst component of 7.4 g, containing 2.3% Ti, 22.5% Mg, and 51.4% Cl.

(51) Polymerization reaction of propene: 2.5 mL of AlEt.sub.3 and 5 mL of cyclohexyl methyl dimethoxy silane (CHMMS) enabling Al/Si (mol)=25 were placed into a 5 L stainless reactor replaced fully by propene gas, followed by an addition of 10 mg of the above prepared catalyst component and 1.2 NL of hydrogen gas, and an introduction of 2.5 L of liquid propene. The resulting mixture was heated to 70° C. and maintained at 70° C. for 1 hour, followed by cooling, pressure releasing, and discharging, to obtain a PP resin. Results were shown in Table 1.

Comparative Example 2A

(52) The present example was the same as Comparative Example 1A, except that the time of the polymerization reaction was extended to 2 hours. Results were shown in Table 1.

(53) TABLE-US-00001 TABLE 1 Activity Molecular of Catalyst Isotacticity of Melt Weight (Kg polymer/ Polymer Index M.I Distribution Examples g catalyst) (%) (g/10 min) Mw/Mn 21A 22.4 93.4 7.8 — 22A 23.6 93.7 8.2 — 23A 18.9 91.8 10.8 — 24A 17.7 95.1 11.2 — 25A 50.2 97.6 1.0 7.8 26A 37.6 98.1 0.7 7.9 27A 48.8 97.6 1.5 8.1 28A 41.6 97.5 2.3 8.0 29A 45.5 97.7 4.9 6.5 30A 41.6 97.6 2.3 7.0 31A 53.9 97.6 2.3 8.4 32A 50.1 98.0 2.8 8.0 33A 73.6 97.7 1.1 7.9 34A 90.5 97.6 1.8 — 35A 63.1 97.7 1.2 — 36A 70.2 98.0 1.7 — 37A 78.8 97.6 1.6 — 38A 86.9 98.2 2.0 — 39A 55.4 95.3 37.8 — 40A 73.5 98.1 1.3 — 41A 57.5 95.5 92.8 — 42A 63.4 97.7 2.5 6.6 43A 80.5 98.1 1.9 6.8 Comparative 38.5 98.0 2.2 3.8 Example 1A Comparative 46.6 98.1 2.5 3.7 Example 2A Note: The symbol “—” in the above Table means that related measurement was not conducted.

(54) The comparison between the above examples and comparative examples shows that, when the catalyst of the present invention is used for polymerization reaction of propene, the catalyst has a high activity and a long term activity, and the prepared polymer has an adjustable isotactic index and a relatively wide molecular weight distribution.

Example 9B

(55) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, 2,4-dibenzoyloxypentane (0.003 mol) and 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine (0.003 mol) were added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was stirred for 30 minutes, heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane was added, and the resulting mixture was washed twice to obtain a catalyst component of 7.6 g, containing 3.7% Ti, 24.8% Mg, and 50.8% Cl.

Example 10B

(56) Preparation of a catalyst component: The present example was the same as Example 9B, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(2,6-dimethylphenylimino)ethyl-2-acetylpyridine.

Example 11B

(57) Preparation of a catalyst component: The present example was the same as Example 9B, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(2,4,6-trimethylphenylimino)ethyl-2-acetylpyridine.

Example 12B

(58) Preparation of a catalyst component: The present example was the same as Example 9B, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(8-quinolylimino)ethyl-2-acetylpyridine.

Example 13B

(59) Preparation of a catalyst component: The present example was the same as Example 9B, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(1-naphthylimino)ethyl-2-acetylpyridine.

Example 14B

(60) Preparation of a catalyst component: The present example was the same as Example 9B, except that 2,4-dibenzoyloxypentane was substituted with 3-ethyl-2,4-dibenzoyloxypentane.

Example 15B

(61) Preparation of a catalyst component: The present example was the same as Example 9B, except that 2,4-dibenzoyloxypentane was substituted with 2,4-di(4-propylbenzoyloxy)pentane.

Example 16B

(62) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, 2,4-dibenzoyloxypentane (0.006 mol) was added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was stirred for 30 minutes, heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane was added, and the resulting mixture was washed twice to obtain a catalyst component of 7.8 g, containing 3.8% Ti, 20.2% Mg, and 51.8% Cl.

Example 17B

(63) Preparation of a catalyst component: 300 mL of TiCl.sub.4 was put into a reactor fully replaced by high-purity nitrogen, and cooled to −20° C., followed by an addition of 7.0 g of alcohol adduct of magnesium chloride (see patent CN1330086A). The resulting mixture was heated with stirring in stages. When the mixture was heated to 40° C., 2,4-dibenzoyloxypentane (0.003 mol) and 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine (0.003 mol) were added. The resulting mixture was kept at 40° C. for 2 hours and then filtered, followed by an addition of 100 mL of TiCl.sub.4. The resulting mixture was heated to 110° C. and treated three times. After that, 60 mL of hexane was added, and the resulting mixture was washed three times to obtain a catalyst component of 7.3 g, containing 3.5% Ti, 23.2% Mg, and 54.2% Cl.

Example 18B

(64) Polymerization reaction of propene: 2.5 mL of AlEt.sub.3 and 5 mL of cyclohexyl methyl dimethoxy silane (CHMMS) enabling Al/Si (mol)=25 were placed into a 5 L stainless reactor replaced fully by propene gas, followed by an addition of 10 mg of the solid component prepared in Example 9B and 1.2 NL of hydrogen gas, and an introduction of 2.5 L of liquid propene. The resulting mixture was heated to 70° C. and maintained at 70° C. for 1 hour, followed by cooling, pressure releasing, and discharging, to obtain a PP resin. Results were shown in Table 2.

Example 19B

(65) Polymerization reaction of propene: The present example was the same as Example 18B, except that the catalyst component was substituted with the catalyst component prepared in Example 10B. Results were shown in Table 2.

Example 20B

(66) Polymerization reaction of propene: The present example was the same as Example 18B, except that the catalyst component was substituted with the catalyst component prepared in Example 11B.

(67) Results were shown in Table 2.

Example 21B

(68) Polymerization reaction of propene: The present example was the same as Example 18B, except that the catalyst component was substituted with the catalyst component prepared in Example 12B. Results were shown in Table 2.

Example 22B

(69) Polymerization reaction of propene: The present example was the same as Example 18B, except that the catalyst component was substituted with the catalyst component prepared in Example 13B. Results were shown in Table 2.

Example 23B

(70) Polymerization reaction of propene: The present example was the same as Example 18B, except that the catalyst component was substituted with the catalyst component prepared in Example 14B. Results were shown in Table 2.

Example 24B

(71) Polymerization reaction of propene: The present example was the same as Example 18B, except that the catalyst component was substituted with the catalyst component prepared in Example 15B. Results were shown in Table 2.

Example 25B

(72) Polymerization reaction of propene: The present example was the same as Example 18B, except that the catalyst component was substituted with the catalyst component prepared in Example 16B. Results were shown in Table 2.

Example 26B

(73) Polymerization reaction of propene: The present example was the same as Example 18B, except that the catalyst component was substituted with the catalyst component prepared in Example 17B. Results were shown in Table 2.

Example 27B

(74) Polymerization reaction of propene: The present example was the same as Example 18B, except that the time of the polymerization reaction was extended to 2 hours. Results were shown in Table 2.

Example 28B

(75) Polymerization reaction of propene: The present example was the same as Example 18B, except that the time of the polymerization reaction was extended to 3 hours. Results were shown in Table 2.

Example 29B

(76) Polymerization reaction of propene: The present example was the same as Example 20B, except that the time of the polymerization reaction was extended to 2 hours. Results were shown in Table 2.

Example 30B

(77) Polymerization reaction of propene: The present example was the same as Example 20B, except that the time of the polymerization reaction was extended to 3 hours. Results were shown in Table 2.

Example 31B

(78) Polymerization reaction of propene: The present example was the same as Example 18B, except that the adding amount of hydrogen was changed to 7.2 NL. Results were shown in Table 2.

Example 32B

(79) Polymerization reaction of propene: The present example was the same as Example 20B, except that the adding amount of hydrogen was changed to 7.2 NL. Results were shown in Table 2.

Comparative Example 1B

(80) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, 2,4-dibenzoyloxypentane (0.003 mol) was added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane was added, and the resulting mixture was stirred for 30 minutes. Another 60 mL of hexane was added, and the resulting mixture was washed three times to obtain a catalyst component of 7.4 g, containing 2.4% Ti, 22.0% Mg, and 50.6% Cl.

(81) Polymerization reaction of propene: 2.5 mL of AlEt.sub.3 and 5 mL of cyclohexyl methyl dimethoxy silane (CHMMS) enabling Al/Si (mol)=25 were placed into a 5 L stainless reactor replaced fully by propene gas, followed by an addition of 10 mg of the above prepared catalyst component and 1.2 NL of hydrogen gas, and an introduction of 2.5 L of liquid propene. The resulting mixture was heated to 70° C. and maintained at 70° C. for 1 hour, followed by cooling, pressure releasing, and discharging, to obtain a PP resin. Results were shown in Table 2.

Comparative Example 2B

(82) Polymerization reaction of propene: 2.5 mL of AlEt.sub.3 and 5 mL of cyclohexyl methyl dimethoxy silane (CHMMS) enabling Al/Si (mol)=25 were placed into a 5 L stainless reactor replaced fully by propene gas, followed by an addition of 10 mg of the solid component prepared in Comparative Example 1 and 7.2 NL of hydrogen gas, and an introduction of 2.5 L of liquid propene. The resulting mixture was heated to 70° C. and maintained at 70° C. for 1 hour, followed by cooling, pressure releasing, and discharging, to obtain a PP resin. Results were shown in Table 2.

(83) TABLE-US-00002 TABLE 2 Activity of Catalyst Isotacticity of Melt Molecular Weight (Kg polymer/ Polymer Index M.I Distribution Examples g catalyst) (%) (g/10 min) Mw/Mn 18B 50.2 98.1 1.0 7.8 19B 40.6 97.6 1.7 7.9 20B 48.8 97.7 1.5 8.1 21B 41.6 97.8 2.3 8.0 22B 45.5 97.7 1.9 7.9 23B 49.3 97.6 2.2 8.0 24B 52.9 98.2 2.3 8.1 25B 50.1 98.0 2.6 8.2 26B 53.2 98.2 2.8 8.5 27B 73.6 97.7 1.1 7.9 28B 90.5 97.6 1.8 — 29B 78.8 97.6 1.6 — 30B 86.9 98.2 2.0 — 31B 55.4 95.3 37.8 — 32B 50.5 95.5 35.8 Comparative 44.3 97.9 2.3 6.9 Example 1B Comparative 45.7 95.8 20.4 — Example 2B Note: The symbol “—” in the above Table means that related measurement was not conducted.

(84) The comparison between the above Examples 18B-32B and Comparative Examples 1B-2B shows that, when a catalyst that uses an imine compound with a ketone group shown in Formula I and a diol ester compound shown in Formula II as a composite internal electron donor is used for polymerization reaction of propene, the catalyst has significantly improved hydrogen response and a high long-term activity, and the polymer prepared has a relatively wide molecular weight distribution.

Example 9C

(85) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, 2-isopropyl-2-isopentyl-1,3-dimethoxy propane (0.003 mol) and the 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine prepared in Example 3 (0.003 mol) were added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was stirred for 30 minutes, heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane was added, and the resulting mixture was washed twice to obtain a catalyst solid component of 7.7 g, containing 3.1% Ti, 22.8% Mg, and 51.2% Cl.

Example 10C

(86) Preparation of a catalyst component: The present example was the same as Example 9C, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with the 6-(2,6-dimethylphenylimino)ethyl-2-acetylpyridine prepared in Example 4.

Example 11C

(87) Preparation of a catalyst component: The present example was the same as Example 9C, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(2,4,6-trimethylphenylimino)ethyl-2-acetylpyridine.

Example 12C

(88) Preparation of a catalyst component: The present example was the same as Example 9C, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(8-quinolylimino)ethyl-2-acetylpyridine prepared in Example 8.

Example 13C

(89) Preparation of a catalyst component: The present example was the same as Example 9C, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(1-naphthylimino)ethyl-2-acetylpyridine.

Example 14C

(90) Preparation of a catalyst component: The present example was the same as Example 9C, except that 2-isopropyl-2-isopentyl-1,3-dimethoxy propane was substituted with 9,9′-bis(methoxymethyl)fluorene.

Example 15C

(91) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, 9,9′-bis(methoxymethyl)fluorene (0.006 mol) was added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was stirred for 30 minutes, heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane and the 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine prepared in Example 3 (0.006 mol) were added, and the resulting mixture was stirred for 30 minutes, followed by an addition of another 60 mL of hexane. The resulting mixture was washed twice to obtain a catalyst solid component of 6.8 g, containing 3.6% Ti, 21.4% Mg, and 52.3% Cl.

Example 16C

(92) Preparation of a catalyst component: 300 mL of TiCl.sub.4 was put into a reactor fully replaced by high-purity nitrogen, and cooled to −20° C., followed by an addition of 7.0 g of alcohol adduct of magnesium chloride (see patent CN1330086A). The resulting mixture was heated with stirring in stages. When the mixture was heated to 40° C., 9,9′-bis(methoxymethyl)fluorene (0.003 mol) and the 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine (0.003 mol) prepared in Example 3 were added. The resulting mixture was kept at 40° C. for 2 hours and then filtered, followed by an addition of 100 mL of TiCl.sub.4. The resulting mixture was heated to 110° C. and treated three times. After that, 60 mL of hexane was added, and the resulting mixture was washed three times to obtain a catalyst solid component of 7.1 g, containing 3.4% Ti, 21.2% Mg, and 50.7% Cl.

Example 17C

(93) Polymerization reaction of propene: 2.5 mL of AlEt.sub.3 and 5 mL of cyclohexyl methyl dimethoxy silane (CHMMS) enabling Al/Si (mol)=25 were placed into a 5 L stainless reactor replaced fully by propene gas, followed by an addition of 10 mg of the solid component prepared in Example 9C and 1.2 NL of hydrogen gas, and an introduction of 2.5 L of liquid propene. The resulting mixture was heated to 70° C. and maintained at 70° C. for 1 hour, followed by cooling, pressure releasing, and discharging, to obtain a PP resin. Results were shown in Table 3.

Example 18C

(94) Polymerization reaction of propene: The present example was the same as Example 17C, except that the solid component was substituted with the solid component prepared in Example 10C. Results were shown in Table 3.

Example 19C

(95) Polymerization reaction of propene: The present example was the same as Example 17C, except that the solid component was substituted with the solid component prepared in Example 11C. Results were shown in Table 3.

Example 20C

(96) Polymerization reaction of propene: The present example was the same as Example 17C, except that the solid component was substituted with the solid component prepared in Example 12C. Results were shown in Table 3.

Example 21C

(97) Polymerization reaction of propene: The present example was the same as Example 17C, except that the solid component was substituted with the solid component prepared in Example 13C. Results were shown in Table 3.

Example 22C

(98) Polymerization reaction of propene: The present example was the same as Example 17C, except that the solid component was substituted with the solid component prepared in Example 14C. Results were shown in Table 3.

Example 23C

(99) Polymerization reaction of propene: The present example was the same as Example 17C, except that the solid component was substituted with the solid component prepared in Example 15C. Results were shown in Table 3.

Example 24C

(100) Polymerization reaction of propene: The present example was the same as Example 17C, except that the solid component was substituted with the solid component prepared in Example 16C. Results were shown in Table 3.

Example 25C

(101) Polymerization reaction of propene: The present example was the same as Example 17C, except that the time of the polymerization reaction was extended to 2 hours. Results were shown in Table 3.

Example 26C

(102) Polymerization reaction of propene: The present example was the same as Example 17C, except that the time of the polymerization reaction was extended to 3 hours. Results were shown in Table 3.

Example 27C

(103) Polymerization reaction of propene: The present example was the same as Example 23C, except that the time of the polymerization reaction was extended to 2 hours. Results were shown in Table 3.

Example 28C

(104) Polymerization reaction of propene: The present example was the same as Example 23C, except that the time of the polymerization reaction was extended to 3 hours. Results were shown in Table 3.

Example 29C

(105) Polymerization reaction of propene: The present example was the same as Example 23C, except that the adding amount of hydrogen was changed to 7.2 NL. Results were shown in Table 3.

Comparative Example 1C

(106) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, 2-isopropyl-2-isopentyl-1,3-dimethoxy propane (0.003 mol) was added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane was added, and the resulting mixture was stirred for 30 minutes. Another 60 mL of hexane was added, and the resulting mixture was washed three times to obtain a catalyst component of 7.4 g, containing 2.4% Ti, 22.0% Mg, and 50.6% Cl.

(107) Polymerization reaction of propene: 2.5 mL of AlEt.sub.3 and 5 mL of cyclohexyl methyl dimethoxy silane (CHMMS) enabling Al/Si (mol)=25 were placed into a 5 L stainless reactor replaced fully by propene gas, followed by an addition of 10 mg of the above prepared catalyst component and 1.2 NL of hydrogen gas, and an introduction of 2.5 L of liquid propene. The resulting mixture was heated to 70° C. and maintained at 70° C. for 1 hour, followed by cooling, pressure releasing, and discharging, to obtain a PP resin. Results were shown in Table 3.

Comparative Example 2C

(108) Polymerization reaction of propene: 2.5 mL of AlEt.sub.3 and 5 mL of cyclohexyl methyl dimethoxy silane (CHMMS) enabling Al/Si (mol)=25 were placed into a 5 L stainless reactor replaced fully by propene gas, followed by an addition of 10 mg of the solid component prepared in Comparative Example 1C and 1.2 NL of hydrogen gas, and an introduction of 2.5 L of liquid propene. The resulting mixture was heated to 70° C. and maintained at 70° C. for 2 hours, followed by cooling, pressure releasing, and discharging, to obtain a PP resin. Results were shown in Table 3.

(109) TABLE-US-00003 TABLE 3 Activity of Isotacticity Molecular Catalyst of Melt Index Weight (Kg Polymer/ Polymer M.I Distribution Examples g Catalyst) (%) (g/10 min) Mw/Mn 17C 43.2 97.8 5.6 6.3 18C 40.7 97.6 6.0 6.5 19C 43.9 97.8 5.5 6.0 20C 44.6 97.8 5.4 6.4 21C 42.8 97.9 5.3 6.3 22C 47.0 97.7 5.8 6.2 23C 50.1 97.7 5.7 6.6 24C 50.5 97.6 5.6 6.6 25C 68.9 97.7 5.6 6.6 26C 79.8 98.0 5.6 6.5 27C 66.5 97.8 5.8 — 28C 82.7 97.8 6.3 — 29C 56.0 95.3 98.5 — Comparative 38.6 98.0 6.2 3.7 Example 1C Comparative 46.3 97.8 5.7 — Example 2C Note: The symbol “—” in the above Table means that related measurement was not conducted.

(110) The comparison between the above Examples 17C-29C and Comparative Examples 1C-2C shows that, when a catalyst that uses an imine compound with a ketone group shown in Formula I and a diether compound shown in Formula IV as a composite internal electron donor is used for polymerization reaction of propene, the catalyst has a high activity and a long term activity, and the polymer prepared has a high isotactic index and a relatively wide molecular weight distribution.

Example 9D

(111) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, DNBP (0.003 mol) and 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine (0.003 mol) were added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was stirred for 30 minutes, heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane was added, and the resulting mixture was washed twice to obtain a catalyst component of 7.5 g, containing 3.6% Ti, 22.8% Mg, and 52.6% Cl.

Example 10D

(112) Preparation of a catalyst component: The present example was the same as Example 9D, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(2,6-dimethylphenylimino)ethyl-2-acetylpyridine.

Example 11D

(113) Preparation of a catalyst component: The present example was the same as Example 9D, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(2,4,6-trimethylphenylimino)ethyl-2-acetylpyridine.

Example 12D

(114) Preparation of a catalyst component: The present example was the same as Example 9D, except that 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine was substituted with 6-(8-quinolylimino)ethyl-2-acetylpyridine.

Example 13D

(115) Preparation of a catalyst component: The present example was the same as Example 9D, except that DNBP was substituted with DIBP.

Example 14D

(116) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, DNBP (0.006 mol) was added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was stirred for 30 minutes, heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane and 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine (0.006 mol) were added, and the resulting mixture was stirred for 30 minutes, followed by an addition of another 60 mL of hexane. The resulting mixture was washed twice to obtain a catalyst component of 7.2 g, containing 3.8% Ti, 22.1% Mg, and 51.3% Cl.

Example 15D

(117) Preparation of a catalyst component: 300 mL of TiCl.sub.4 was put into a reactor fully replaced by high-purity nitrogen, and cooled to −20° C., followed by an addition of 7.0 g of alcohol adduct of magnesium chloride (see patent CN1330086A). The resulting mixture was heated with stirring in stages. When the mixture was heated to 40° C., DNBP (0.003 mol) and 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine (0.003 mol) were added. The resulting mixture was kept at 40° C. for 2 hours and then filtered, followed by an addition of 100 mL of TiCl.sub.4. The resulting mixture was heated to 110° C. and treated three times. After that, 60 mL of hexane was added, and the resulting mixture was washed three times to obtain a catalyst component of 7.3 g, containing 3.5% Ti, 23.2% Mg, and 54.2% Cl.

Example 16D

(118) Preparation of a catalyst component: 300 mL of TiCl.sub.4 was put into a reactor fully replaced by high-purity nitrogen, and cooled to −20° C., followed by an addition of 7.0 g of magnesium ethylate. The resulting mixture was heated with stirring in stages. When the mixture was heated to 40° C., DNBP (0.003 mol) and 6-(2,6-diisopropylphenylimino)ethyl-2-acetylpyridine (0.003 mol) were added. The resulting mixture was kept at 40° C. for 3 hours and then filtered, followed by an addition of 100 mL of TiCl.sub.4. The resulting mixture was heated to 110° C. and treated three times. After that, 60 mL of hexane was added, and the resulting mixture was washed three times to obtain a catalyst component of 6.6 g, containing 3.0% Ti, 22.6% Mg, and 52.0% Cl.

Example 17D

(119) Polymerization reaction of propene: 2.5 mL of AlEt.sub.3 and 5 mL of cyclohexyl methyl dimethoxy silane (CHMMS) enabling Al/Si (mol)=25 were placed into a 5 L stainless reactor replaced fully by propene gas, followed by an addition of 10 mg of the solid component prepared in Example 9D and 1.2 NL of hydrogen gas, and an introduction of 2.5 L of liquid propene. The resulting mixture was heated to 70° C. and maintained at 70° C. for 1 hour, followed by cooling, pressure releasing, and discharging, to obtain a PP resin. Results were shown in Table 4.

Example 18D

(120) Polymerization reaction of propene: The present example was the same as Example 17D, except that the catalyst component was substituted with the catalyst component prepared in Example 10D. Results were shown in Table 4.

Example 19D

(121) Polymerization reaction of propene: The present example was the same as Example 17D, except that the catalyst component was substituted with the catalyst component prepared in Example 11D. Results were shown in Table 4.

Example 20D

(122) Polymerization reaction of propene: The present example was the same as Example 17D, except that the catalyst component was substituted with the catalyst component prepared in Example 12D. Results were shown in Table 4.

Example 21D

(123) Polymerization reaction of propene: The present example was the same as Example 17D, except that the catalyst component was substituted with the catalyst component prepared in Example 13D. Results were shown in Table 4.

Example 22D

(124) Polymerization reaction of propene: The present example was the same as Example 17D, except that the catalyst component was substituted with the catalyst component prepared in Example 14D. Results were shown in Table 4.

Example 23D

(125) Polymerization reaction of propene: The present example was the same as Example 17D, except that the catalyst component was substituted with the catalyst component prepared in Example 15D. Results were shown in Table 4.

Example 24D

(126) Polymerization reaction of propene: The present example was the same as Example 17D, except that the catalyst component was substituted with the catalyst component prepared in Example 16D. Results were shown in Table 4.

Example 25D

(127) Polymerization reaction of propene: The present example was the same as Example 17D, except that the time of the polymerization reaction was extended to 2 hours. Results were shown in Table 4.

Example 26D

(128) Polymerization reaction of propene: The present example was the same as Example 17D, except that the time of the polymerization reaction was extended to 3 hours. Results were shown in Table 4.

Example 27D

(129) Polymerization reaction of propene: The present example was the same as Example 21D, except that the time of the polymerization reaction was extended to 2 hours. Results were shown in Table 4.

Example 28D

(130) Polymerization reaction of propene: The present example was the same as Example 21D, except that the time of the polymerization reaction was extended to 3 hours. Results were shown in Table 4.

Example 29D

(131) Polymerization reaction of propene: The present example was the same as Example 17D, except that the adding amount of hydrogen was changed to 7.2 NL. Results were shown in Table 4.

Comparative Example 1D

(132) Preparation of a catalyst component: 4.8 g of magnesium chloride, 95 mL of methylbenzene, 4 mL of epoxy chloropropane, and 12.5 mL of tributyl phosphate (TBP) were put one by one into a reactor fully replaced by high-purity nitrogen gas, and were heated with stirring to 50° C. and kept at 50° C. for 2.5 hours. After the solid was completely dissolved, 1.4 g of phthalic anhydride was added. The resulting solution was still kept at 50° C. for 1 hour, and then cooled to a temperature below −25° C., followed by a dropwise addition of TiCl.sub.4 within 1 hour. The resulting solution was slowly heated to 80° C. to gradually precipitate a solid. Then, DNBP (0.006 mol) was added. The resulting mixture was kept at 80° C. for 1 hour, and was filtered thermally, followed by an addition of 150 mL of methylbenzene. The resulting mixture was washed twice to obtain a solid. Then, 100 mL of methylbenzene was added, and the resulting mixture was heated to 110° C., and washed three times with each time lasting for 10 minutes. After that, 60 mL of hexane was added, and the resulting mixture was stirred for 30 minutes. Another 60 mL of hexane was added, and the resulting mixture was washed three times to obtain a catalyst component of 7.4 g, containing 2.4% Ti, 22.0% Mg, and 50.6% Cl.

(133) Polymerization reaction of propene: 2.5 mL of AlEt.sub.3 and 5 mL of cyclohexyl methyl dimethoxy silane (CHMMS) enabling Al/Si (mol)=25 were placed into a 5 L stainless reactor replaced fully by propene gas, followed by an addition of 10 mg of the above prepared catalyst component and 1.2 NL of hydrogen gas, and an introduction of 2.5 L of liquid propene. The resulting mixture was heated to 70° C. and maintained at 70° C. for 1 hour, followed by cooling, pressure releasing, and discharging, to obtain a PP resin. Results were shown in Table 4.

Comparative Example 2D

(134) Polymerization reaction of propene: 2.5 mL of AlEt.sub.3 and 5 mL of cyclohexyl methyl dimethoxy silane (CHMMS) enabling Al/Si (mol)=25 were placed into a 5 L stainless reactor replaced fully by propene gas, followed by an addition of 10 mg of the above prepared catalyst component and 7.2 NL of hydrogen gas, and an introduction of 2.5 L of liquid propene. The resulting mixture was heated to 70° C. and maintained at 70° C. for 1 hour, followed by cooling, pressure releasing, and discharging, to obtain a PP resin. Results were shown in Table 4.

Comparative Example 3D

(135) The present comparative example was the same as Comparative Example 1D, except that the time of the polymerization reaction time was extended to 2 hours. Results were shown in Table 4.

(136) TABLE-US-00004 TABLE 4 Activity of Molecular Catalyst Isotacticity of Melt Weight (Kg Polymer/g Polymer Index M.I Distribution Examples Catalyst) (%) (g/10 min) Mw/Mn 17D 41.6 97.6 2.3 7.0 18D 42.0 97.7 2.2 6.5 19D 46.0 97.8 2.0 6.4 20D 45.6 97.8 2.1 7.0 21D 40.5 97.9 1.8 6.2 22D 44.7 96.8 2.3 6.5 23D 52.3 97.5 2.5 6.3 24D 48.0 97.8 2.0 6.7 25D 63.4 97.7 2.5 6.6 26D 80.5 98.1 1.9 6.8 27D 60.8 97.6 2.5 7.2 28D 78.7 98.3 1.3 — 29D 62.0 95.4 47.6 — Comparative 38.5 98.0 2.2 3.8 Example 1D Comparative 43.8 96.3 28.6 — Example 2D Comparative 46.6 98.1 2.5 — Example 3D Note: The symbol “—” in the above Table means that related measurement was not conducted.

(137) The comparison between the above Examples 17D-29D and Comparative Examples 1D-3D shows that, when a catalyst that uses an imine compound with a ketone group shown in Formula I and an aromatic carboxylic acid ester compound shown in Formula II as a composite internal electron donor is used for polymerization reaction of propene, the catalyst has a high activity and a long term activity as well as a good hydrogen response, and the polymer prepared has a high isotactic index and a relatively wide molecular weight distribution.

(138) It should be noted that the examples above are provided only for illustrating the present invention, rather than limiting the present invention in any way. Amendments can be made to the present invention based on the disclosure of the claims and within the scope and spirit of the present invention. Although the above descriptions about the present invention involve particular methods, materials, and implementing examples, it does not means that the present invention is limited to the presently disclosed examples. On the contrary, the present invention can be extended to other methods and applications having same functions as those of the present invention.