OLEFIN POLYMERIZATION CATALYST CARRIER, SOLID CATALYST COMPONENT AND USE THEREOF

Abstract

Provided is an olefin polymerization catalyst carrier with a general structure formula of Mg(OR.sup.I).sub.n(OR.sup.II).sub.2-n, wherein: 0≦n≦2, and R.sup.I and R.sup.II can be the same or different and are each independently selected from a C.sub.1-C.sub.20 hydrocarbon group. In the X-ray diffraction pattern of the catalyst carrier, there are a set of diffraction peaks in the range of a 2θ diffraction angle of 5°-15°, and the set of diffraction peaks contain 1-4 main diffraction peaks. Also disclosed is an olefin polymerization solid catalyst component which is prepared from the carrier Mg(OR.sup.I).sub.n(OR.sup.II).sub.2-n, a titanium compound, and at least one electron donor compound. In addition, also disclosed is an olefin polymerization catalyst containing the solid catalyst component, at least one organic aluminum compound, and optionally, an external electron donor compound.

Claims

1. An olefin polymerization catalyst carrier, having a general formula of Mg(OR.sup.I).sub.n(OR.sup.II).sub.2-n, wherein 0≦n≦2, and R.sup.I and R.sup.II are same or different, and are each independently selected from a C.sub.1-C.sub.20 hydrocarbon group; and wherein in the X-ray diffraction pattern of the catalyst carrier, there are a set of diffraction peaks in the range of a 2θ diffraction angle of 5°-15°, and the set of diffraction peaks contain 1-4 main diffraction peaks.

2. The catalyst carrier according to claim 1, wherein in the catalyst carrier Mg(OR.sup.I).sub.n(OR.sup.II).sub.2-n, R.sup.I and R.sup.II are the same or different, and are each independently selected from a C.sub.1-C.sub.8 hydrocarbon group.

3. The catalyst carrier according to claim 1, wherein in the X-ray diffraction pattern of the catalyst carrier Mg(OR.sup.I).sub.n(OR.sup.II).sub.2-n, there are a set of diffraction peaks in the range of a 2θ diffraction angle of 7°-13°, and the set of diffraction peaks contain 1-4 main diffraction peaks.

4. The catalyst carrier according to claim 1, wherein in the X-ray diffraction pattern of the catalyst carrier Mg(OR.sup.I).sub.n(OR.sup.II).sub.2-n, there are a first set of diffraction peaks containing 1-4 main diffraction peaks in the range of a 2θ diffraction angle of 5°-15°, and there are a second set of diffraction peaks containing 1-3 main diffraction peaks in the range of a 2θ diffraction angle of 20°-30°.

5. The catalyst carrier according to claim 4, wherein in the X-ray diffraction pattern of the catalyst carrier Mg(OR.sup.I).sub.n(OR.sup.II).sub.2-n, the highest diffraction peak is within the range of the first set of peaks.

6.-11. (canceled)

12. An olefin polymerization solid catalyst component comprising the catalyst carrier according to claim 1, further comprising a titanium compound with a general formula TiX.sub.n(OR).sub.4-n, wherein R is a C.sub.1-C.sub.20 hydrocarbon group, X is a halogen, n=0-4, and at least one electron donor compound.

13. The solid catalyst component according to claim 12, wherein the titanium compound is selected from the group consisting of titanium tetrachloride, titanium tetrabromide, titanium tetraiodide and alkoxy titanium halide, and is preferably titanium tetrachloride.

14. The solid catalyst component according to claim 12, wherein the electron donor compound is selected from Lewis base containing one or more electronegative groups in which the electron donor atom is selected from the group consisting of N, O, S, P, As or Sn.

15.-17. (canceled)

18. An olefin polymerization catalyst comprising the following components or the reactants of the following components: a) a solid catalyst component according to claim 12; b) at least one organoaluminum compound with a general formula AlR.sub.nX.sub.(3-n), wherein R is a hydrogen, a hydrocarbon group having 1-20 carbon atoms; X is a halogen, n is an integer of 0≦n≦3; and, optionally, c) at least one external electron donor compound.

19. The catalyst according to claim 18, wherein the at least one organoaluminum compound is selected from the group consisting of trialkylaluminum compound, trialkylaluminum and alkyl aluminum halide, alkyl aluminum cyanide, and alkyl aluminum sesquichloride.

20. The catalyst according to claim 18, wherein the external electron donor is selected from siloxane compounds with a general formula R.sub.nSi(OR.sub.1).sub.4-n, wherein R and R.sub.1 are C.sub.1-C.sub.18 hydrocarbon groups, and optionally have heteroatoms; n is an integer of 0≦n≦3.

21.-22. (canceled)

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0141] FIG. 1 shows XRD (X-ray diffraction) patterns of various catalyst carriers of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS

[0142] Hereinafter, the present invention will be described in detail by way of examples, but the present invention is not limited thereto.

[0143] The operation of preparing the catalyst in the examples was carried out under high purity nitrogen protection.

Example 1

[0144] In a four-necked flask equipped with a stirrer, a reflux condenser was installed and a cumulative gas meter was connected to the reflux condenser. After the whole reaction apparatus was fully purged with nitrogen, 50 mL of anhydrous oxygen free ethanol and 0.55 g of iodine were added to the vessel and dissolved, 6 g of metallic magnesium was added thereto, and the temperature was raised to the reflux temperature of ethanol under stirring. 90 mL of anhydrous ethanol and 9 g of magnesium powder were added every 10 minutes from the start of reflux, for three times in total. The viscosity of the liquid began to rise sharply at about 1-2 hours after the completion of the third addition (at this time, the reaction rate was about 85% as determined by the amount of hydrogen produced). Then, 150 mL of ethanol was added to the reaction system, the reaction continued until no hydrogen was produced. The reaction time was about 6 hours, and a suspension containing a white solid powder was obtained. The suspension was added to an autoclave, stirred at 145° C. and 1.4 MPa for 3 hours, and then filtered under pressure and dried to obtain a carrier Mg (OEt).sub.2.

Example 2

[0145] The preparation steps of the carrier were the same as those of Example 1 except that the reaction temperature in the autoclave was changed from 145° C. to 140° C., the reaction pressure was changed from 1.4 MPa to 1.0 MPa, and the carrier Mg (OEt).sub.2 was obtained after 2 hours of reaction time.

Example 3

[0146] To an autoclave fully purged with nitrogen, 40 mL of anhydrous oxygen free ethanol and 0.33 g of iodine were added and dissolved. 3 g of metallic magnesium was added thereto, and the temperature was raised to the reflux temperature of ethanol under stirring. 40 mL of anhydrous ethanol and 6 g of magnesium powder were added every 10 minutes from the start of reflux, for three times in total. The viscosity of the liquid began to rise sharply at about 1-2 hours after the completion of the third addition (at this time the reaction rate was about 85% as determined by the amount of hydrogen produced), then 80 mL of ethanol was added to the reaction system, the reaction continued until no hydrogen was produced. The entire reaction time was about 6 hour. After completion of the reaction, the mixture was heated at 140° C. and 0.8 MPa for 3 hours, and then filtered under pressure and dried to obtain a carrier Mg(OEt).sub.2.

Example 4 Catalyst Component

[0147] To a 500 ml of fully nitrogen-purged five-necked flask equipped with a stirrer were added 10 g of carrier prepared in the Example 1 and 80 mL toluene to prepare a suspension, and then 20 mL of titanium tetrachloride was added dropwise at −15° C., after addition was completed the system was slowly warmed to 10° C., and was added 60 mL of titanium tetrachloride dropwise, then the system temperature was slowly raised to 80° C. and then, 12 mmol of dibutyl phthalate was added, and then the temperature of the system was raised up to 120° C. and maintained constant for 2 hours, then the liquid was cleaned by filter pressing and filtered, the resulting solid was washed 3 times with 120 mL titanium tetrachloride at 125° C. The resulting solid was washed two times at 60° C. and two times at room temperature with 150 mL of hexane; after removal of the liquid by filtration and drying the solid, solid powder, i.e. solid catalyst component, was obtained. Analytical results of the solid showed that the titanium content was 2.83 (wt) %, dibutyl phthalate content was 11.24 (wt) %.

Example 5

[0148] The catalyst component was prepared in the same manner as in Example 4 except that di-n-butyl phthalate was changed to 9,9-methoxymethyl fluorene.

Example 6

[0149] The catalyst component was prepared in the same manner as in Example 4 except that di-n-butyl phthalate was changed to 2-isopropyl-2-isopentyl-1,3-dimethoxypropane.

Example 7

[0150] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was replaced with the carrier prepared in Example 2.

Example 8

[0151] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was replaced with the carrier prepared in Example 2 and di-n-butyl phthalate was changed to 9,9-methoxymethyl fluorene.

Example 9

[0152] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was changed to the carrier prepared in Example 2 and the di-n-butyl phthalate was changed to 2-isopropyl-2-Isopentyl-1,3-dimethoxypropane.

Example 10

[0153] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was replaced with the carrier prepared in Example 3.

Example 11

[0154] In a four-necked flask equipped with a stirrer, a reflux condenser was installed and a cumulative gas meter was connected to the reflux condenser. After the whole reaction apparatus was fully purged with nitrogen, 50 mL of anhydrous oxygen free ethanol and 0.55 g of iodine were added to the vessel and dissolved, 6 g of metallic magnesium was added thereto, and the temperature was raised to the reflux temperature of ethanol under stirring. 90 mL of anhydrous ethanol and 9 g of magnesium powder were added every 10 minutes from the start of reflux, for three times in total. The viscosity of the liquid began to rise sharply at about 1-2 hours after the completion of the third addition (at this time, the reaction rate was about 85% as determined by the amount of hydrogen produced). Then, 150 mL of ethanol was added to the reaction system, the reaction continued until no hydrogen was produced. The total reaction time was about 6 hours, and a suspension containing a white solid powder was obtained and then dried to obtain a white solid powder.

Example 12

[0155] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was changed to the carrier prepared in Example 11.

Example 13

[0156] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was replaced with the carrier prepared in Example 11 and di-n-butyl phthalate was changed to 9,9-methoxymethyl fluorene.

Example 14

[0157] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was changed to the carrier prepared in Example 11 and the di-n-butyl phthalate was changed to 2-isopropyl-2-isopentyl-1,3-dimethoxypropane.

Example 15

[0158] The catalyst component was prepared in the same manner as in Example 4 except that di-n-butyl phthalate was changed to ethyl 2,3-diisopropylsuccinate.

Example 16

[0159] The catalyst component was prepared in the same manner as in Example 4 except that di-n-butyl phthalate was changed to 9-methoxymethyl-fluorenylcarboxylic acid-(9) ethyl ester.

Example 17

[0160] The catalyst component was prepared in the same manner as in Example 4 except that di-n-butyl phthalate was changed to diethyl fluorene-9,9-dicarboxylate.

Example 18

[0161] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was changed to the carrier prepared in Example 11 and the di-n-butyl phthalate was changed to ethyl 2,3-diisopropylsuccinate.

Example 19

[0162] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was replaced with the carrier prepared in Example 11 and the di-n-butyl phthalate was changed to 9-methoxymethyl-fluorene carboxylic acid-(9)-ethyl ester.

Example 20

[0163] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was changed to the carrier prepared in Example 11 and the di-n-butyl phthalate was changed to diethyl fluorene-9,9-dicarboxylate.

Example 21

[0164] The carrier was prepared in the same manner as the same as in Example 1 except that the alcohol was changed to a mixed alcohol of ethanol and n-butanol in a volume ratio of 5:1. The carrier Mg(OEt).sub.n(O.sup.nBu).sub.2-n (0≦n≦2) was obtained.

Example 22

[0165] The catalyst component was prepared in the same manner as in Example 4 except that the carrier of Example 1 was changed to the carrier of Example 21.

Example 23

[0166] The carrier was prepared in the same manner as in Example 1 except that the ethanol was changed to n-propanol. The carrier Mg (O.sup.nPr).sub.2 was obtained.

Example 24

[0167] The catalyst component was prepared in the same manner as in Example 4 except that the carrier of Example 1 was changed to the carrier of Example 23.

Example 25

[0168] To an autoclave fully purged with nitrogen, 40 mL of anhydrous oxygen free ethanol and 0.33 g of iodine were added and dissolved. 3 g of metallic magnesium was added thereto, and the temperature was raised to the reflux temperature of ethanol under stirring. 40 mL of anhydrous ethanol and 6 g of magnesium powder were added every 10 minutes from the start of reflux, for three times in total. The viscosity of the liquid began to rise sharply at about 1-2 hours after the completion of the third addition (at this time the reaction rate was about 85% as determined by the amount of hydrogen produced), then 80 mL of ethanol was added to the reaction system, the reaction continued until no hydrogen was produced. The entire reaction time was about 6 hour. After completion of the reaction, the mixture was heated at 160° C. and 2 MPa for 1 hours, and then filtered under pressure and dried to obtain a carrier Mg(OEt).sub.2.

Example 26

[0169] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was changed to the carrier prepared in Example 25.

Example 27

[0170] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was changed to the carrier prepared in Example 25 and the di-n-butyl phthalate was changed to 9,9-methoxymethylfluorene.

Example 28

[0171] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was changed to the carrier prepared in Example 25 and the di-n-butyl phthalate was changed to 2-isopropyl-2-isopentyl-1,3-dimethoxypropane.

Example 29

[0172] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was changed to the carrier prepared in Example 25 and the di-n-butyl phthalate was changed to ethyl 2,3-diisopropylsuccinate.

Example 30

[0173] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was replaced with the carrier prepared in Example 25 and the di-n-butyl phthalate was changed to 9-methoxymethyl-fluorenylcarboxylic acid-(9)-ethyl ester.

Example 31

[0174] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was replaced with the carrier prepared in Example 25 and the di-n-butyl phthalate was changed to diethyl fluorene-9,9-dicarboxylate.

Example 32

[0175] To an autoclave fully purged with nitrogen, 40 mL of anhydrous oxygen free ethanol and 0.33 g of iodine were added and dissolved. 3 g of metallic magnesium was added thereto, and the temperature was raised to the reflux temperature of ethanol under stirring. 40 mL of anhydrous ethanol and 6 g of magnesium powder were added every 10 minutes from the start of reflux, for three times in total. The viscosity of the liquid began to rise sharply at about 1-2 hours after the completion of the third addition (at this time the reaction rate was about 85% as determined by the amount of hydrogen produced), then 80 mL of ethanol was added to the reaction system, the reaction continued until no hydrogen was produced. The entire reaction time was about 6 hour. After completion of the reaction, the mixture was heated at 80° C. and 2.5 MPa for 1 hours, and then filtered under pressure and dried to obtain a carrier Mg(OEt).sub.2.

Example 33

[0176] The catalyst component was prepared in the same manner as in Example 4 except that the carrier prepared in Example 1 was replaced with the carrier prepared in Example 32.

Comparative Example 1

[0177] To a 1000 mL of flask fully purged with nitrogen, 400 mL of white oil, 46 mL of anhydrous ethanol and 20 g of magnesium chloride were added, stirred and heated to 130° C. at which the reaction was continued for 3 hours. The reactant was transferred to an emulsifier for emulsification at 5000 rpm for 20 min and then transferred to 5000 mL of hexane at −20° C., stirred at low temperature for 5 hours and then washed with hexane for 3 to 6 times. The white powder was filtered, followed by removing hexane after drying to obtain a spherical carrier.

Comparative Example 2

[0178] To a 500 mL of 5-necked flask fully purged with nitrogen and equipped with a stirrer, 10 g of the spherical carrier prepared in Comparative Example 1 and 150 mL of titanium tetrachloride were added to produce a suspension, maintained at −15° C. for 1 hour, and slowly raised to 80° C., 3.5 g of di-n-butyl phthalate was added, the temperature was raised to 110° C. for 1 hour, and then the liquid was filtered off under pressure. The resulting solid was washed with 120 mL of titanium tetrachloride at 125° C. three times. The resulting solid was washed with 150 mL of hexane at 60° C. four times, followed by filtering the liquid and drying to obtain a solid powder as a solid catalyst component.

Comparative Example 3

[0179] The catalyst component was prepared in the same manner as in Comparative Example 2 except that di-n-butyl phthalate was changed to 9,9-methoxymethyl fluorene.

Comparative Example 4

[0180] The catalyst component was prepared in the same manner as in Comparative Example 2 except that di-n-butyl phthalate was changed to 2-isopropyl-2-isopentyl-1,3-dimethoxypropane.

Comparative Example 5

[0181] The carrier was prepared in the same manner as in Example 1 except that the ethanol was changed to a mixed alcohol solution of methanol, ethanol and isopropanol in a volume ratio of 1:7.5:1.5. The carrier Mg(OMe).sub.x(OEt).sub.y(O.sup.iPr).sub.z (x+y+z=2) was obtained.

Comparative Example 6

[0182] The catalyst was prepared in the same manner as in Example 4 except that the carrier of Example 1 was changed to the carrier of Comparative Example 5.

Comparative Example 7

[0183] The carrier was prepared in the same manner as in Example 1 except that the ethanol was changed to a mixed alcohol solution of methanol, ethanol and n-butanol in a volume ratio of 1:5:1. The carrier Mg(OMe).sub.x(OEt).sub.y(O.sup.nBu).sub.z (x+y+z=2) was obtained.

Comparative Example 8

[0184] The catalyst was prepared in the same manner as in Example 4 except that the carrier of Example 1 was changed to the carrier of Comparative Example 7.

[0185] As can be seen from FIG. 1, the two sets of diffraction angles 2θ of the carrier obtained in Example 1 are in the range of 10-11° and 23-25°, and there are two main diffraction peaks in each set, the corresponding diffraction angle 2θ values of the highest peaks are 10.4566° and 23.1095°.

[0186] The carrier prepared in Example 2 has the above characteristics, and the corresponding diffraction angles 2θ of the highest peaks in each set are 10.4904° and 23.1433°, respectively.

[0187] The carrier obtained in Example 11 has three diffraction peaks in the range of 5-15° of the diffraction angle 2θ, and the corresponding diffraction angle 2θ of the highest peak is 10.8660°, and there is only one shoulder peak in the range of 20-30° and no main diffraction peak.

[0188] The carrier of Comparative Example 1 is a magnesium chloride alcoholate carrier, there are two diffraction peaks in the range of 5 to 15° of 2θ, and the corresponding 2θ value of the highest peak is slightly smaller than that of the above-mentioned ethoxymagnesium carrier.

[0189] The diffraction peaks of the carrier obtained in Example 3 were tested to be characterized in that the corresponding diffraction angles 2θ of the highest peaks in each set are 10.4852° and 23.1045°, respectively.

[0190] The diffraction peaks of the obtained carrier of Example 21 are characterized in that the corresponding diffraction angles 2θ of the highest peaks in each set are 9.3805° and 21.0952°, respectively.

[0191] The diffraction peaks of the obtained carrier of Example 23 are characterized in that the corresponding diffraction angles 2θ of the highest peaks in each set are 8.9458° and 24.1983°, respectively.

[0192] The diffraction peaks of the obtained carrier of Example 25 are characterized in that the corresponding diffraction angles 2θ of the highest peaks in each set are 10.4570° and 23.1842°, respectively.

[0193] The diffraction peaks of the obtained carrier of Example 32 are characterized in that the corresponding diffraction angles 2θ of the highest peak in each set are 10.4445° and 23.1350°, respectively.

Propylene Polymerization

[0194] Propylene polymerization evaluation was made by using the solid catalyst components prepared in the Examples and comparison Examples 2-4:

[0195] To a 5 L of stainless steel reactor fully purged with nitrogen were added 5 mL of solution of triethylaluminum in hexane at a concentration of 0.5 mol/L and 1 mL of solution of methyl cyclohexyl dimethoxy silane (CMMS) in hexane at a concentration of 0.1 mol/L and 10 mg of prepared catalyst, 10 mL of hexane was added to rinse the feed lines, and then 2 L of hydrogen (standard state) and 2.5 L of purified propylene were added, the reaction was controlled at 20° C. to prepolymerize for 5 minutes, the temperature was raised to 70° C., and at this temperature the polymerization reaction was carried out for 1 hour. After the reaction, the reactor was cooled and the stirring was stopped, the reaction product was discharged and dried to obtain a polymer. (Stacking density of the polymer measured by JB/T 2412-2008 method, isotacticity measured by JB/T 3682-2000 method). The polymerization activity was shown in Table 1.

TABLE-US-00001 TABLE 1 Catalyst performance activity isotac- stacking internal electron donor titanium Kg/ ticity density Example No. type Wt % Wt % gCat .Math. h.sup.−1 % g/cm.sup.3 Example 4  di-n-butyl phthalate 11.24 2.83 5.4 98.6 0.41 Example 5  9,9-methoxymethylfluorene 15.09 3.69 6.8 99.1 0.42 Example 6  2-isopropyl-2-isopentyl- 16.54 3.17 6.9 99.1 0.40 1,3-dimethoxypropane Example 7  di-n-butyl phthalate 13.10 3.33 5.2 98.5 0.40 Example 8  9,9-methoxymethylfluorene 20.34 3.19 6.6 98.9 0.41 Example 9  2-isopropyl-2-isopentyl- 10.89 3.14 6.7 99.3 0.39 1,3-dimethoxypropane Example 10 di-n-butyl phthalate 13.14 3.16 5.0 98.4 0.41 Example 12 di-n-butyl phthalate 11.16 2.54 4.6 99.0 0.40 Example 13 9,9- 20.42 2.84 5.8 99.1 0.39 methoxymethylfluorene Example 14 2-isopropyl-2-isopentyl- 10.89 3.14 5.5 98.9 0.40 1,3-dimethoxypropane Example 15 ethyl 2,3- 15.55 2.74 4.8 99.1 0.41 diisopropylsuccinate Example 16 9-methoxymethyl- 15.80 3.05 5.5 98.3 0.42 fluorenylcarboxylic acid (9)-ethyl ester Example 17 diethyl fluorene- 13.46 3.32 6.3 98.8 0.42 9,9-dicarboxylate Example 18 ethyl 2,3- 16.51 2.97 4.2 98.7 0.40 diisopropylsuccinate Example 19 9-methoxymethyl- 16.24 3.64 5.0 98.2 0.39 fluorenylcarboxylic acid (9)-ethyl ester Example 20 diethyl fluorene- 14.23 3.45 5.6 98.6 0.41 9,9-dicarboxylate Example 22 di-n-butyl phthalate 11.54 2.74 4.9 98.7 0.40 Example 24 di-n-butyl phthalate 12.10 2.47 4.7 98.4 0.41 Example 26 di-n-butyl phthalate 12.50 2.71 5.2 98.5 0.40 Example 27 9,9- 18.34 2.50 6.4 98.9 0.40 methoxymethylfluorene Example 28 2-isopropyl-2-isopentyl- 12.20 2.84 6.4 98.4 0.41 1,3-dimethoxypropane Example 29 ethyl 2,3- 14.55 2.58 4.5 98.1 0.42 diisopropylsuccinate Example 30 9-methoxymethyl- 16.24 3.04 5.6 98.1 0.39 fluorenylcarboxylic acid-(9)-ethyl ester Example 31 diethyl fluorene- 17.32 2.94 5.9 98.3 0.40 9,9-dicarboxylate Example 33 di-n-butyl phthalate 13.56 2.85 5.1 98.4 0.39 Comparative di-n-butyl phthalate 16.59 2.16 4.1 98.6 0.43 Example 2 Comparative 9,9- 19.23 2.51 5.5 99.3 0.43 Example 3 methoxymethylfluorene Comparative 2-isopropyl-2-isopentyl- 18.45 2.78 5.1 99.2 0.44 Example 4 1,3-dimethoxypropane Comparative di-n-butyl phthalate 12.10 2.92 4.9 98.7 0.42 Example 6 Comparative di-n-butyl phthalate 13.62 2.85 5.0 98.5 0.42 Example 8

[0196] It can be seen from the polymerization results in Table 1 that the activity of the catalyst prepared by the alkoxymagnesium carrier is higher than that of the catalyst prepared by the magnesium chloride ethanol carrier. The activity centers of the catalyst prepared by the carrier of the examples obtained under high temperature and high pressure are distributed evenly, the catalyst activity is high and the polymer made using the catalyst has a higher stacking density. The propylene polymerization activity is substantially improved compared to the catalyst prepared using the carrier of the comparative example which has not been subjected to high temperature and high pressure treatment, particularly compared to the catalyst prepared by the magnesium chloride alcoholate carrier. By changing the reaction temperature, reaction pressure and reaction time of the high temperature and high pressure treatment step, the particle size and morphology of the obtained carrier particles can be adjusted to improve the performance of the catalysts.

[0197] Although the present invention has been generally described and in more detail with the specific embodiments, on the basis of the present invention, it would be obvious for those skilled in this art to make certain modifications or improvements. Therefore, these modifications or improvements made without departing from the spirit of the present invention fall in the scope of the invention as claimed.

INDUSTRIAL APPLICABILITY

[0198] The present invention relates to an olefin polymerization catalyst carrier and an olefin polymerization solid catalyst component prepared from said carrier, a titanium compound, at least one electron donor compound. For the olefin polymerization catalyst carrier of the present invention, the distribution of the carrier particles is concentrated, the content of the fine powder is small, the stacking density is high, and since the catalyst and the polymer replicate the structure and morphology of the carrier, the direct results show that the particle distribution of the solid catalyst component, the catalyst and the polymer is concentrated, the content of the fine powder is small and the stacking density is high. The olefin polymerization catalyst prepared by the carrier and the solid catalyst component has high activity, and the obtained polymer has a regular morphology, a compact structure and a high stacking density. The present invention has industrial applicability.