The present invention relates to a solid catalyst component comprising magnesium, titanium, halide, and internal electron donor compounds comprising dilakylurea, malonate, succinate, and 1,3-diether, wherein the succinate amount is less than about 30% by mol with respect to the total amount of electron donor, the molar ratio between succinate and 1,3-diether is in the range of about 0.1-0.5, and the molar ratio between malonate and 1,3-diether is in the range of about 0.5-2.5. The catalyst component according to present invention provides highly isotactic polypropylene polymer with broad molecular weight distribution.

The present invention relates to a solid catalyst component comprising magnesium, titanium, halide, and internal electron donor compounds comprising dilakylurea, malonate, succinate, and 1,3-diether, wherein the succinate amount is less than about 30% by mol with respect to the total amount of electron donor, the molar ratio between succinate and 1,3-diether is in the range of about 0.1-0.5, and the molar ratio between malonate and 1,3-diether is in the range of about 0.5-2.5. The catalyst component according to present invention provides highly isotactic polypropylene polymer with broad molecular weight distribution.

Propylene is polymerised in the presence of a polymerisation catalyst comprising a solid catalyst component, an organoaluminium compound and an external electron donor, the process comprising the steps of (i) contacting propylene and hydrogen with the polymerisation catalyst in polymerisation conditions in a polymerisation reactor to produce a polymer of propylene; (ii) recovering the polymer of propylene from the polymerisation reactor; wherein the polymer of propylene has MFR of from more than 100 to 10000 g/10 min. The solid catalyst component comprises titanium, magnesium, halogen and an internal electron donor, characterised in that the internal electron donor is a compound according to formula (I) with R.sub.1 and R.sub.2 being the same or different and being a linear or branched C.sub.1-C.sub.12-alkyl group, and with R being H or a linear, branched or cyclic C.sub.1 to C.sub.12-alkyl, whereby it is preferred that R is not H. The external electron donor is a silane compound having the formula Si(OR.sup.11).sub.nR.sup.10.sub.4-n, wherein each R.sup.10 is independently a linear or branched C.sub.1-C.sub.4 alkyl, preferably methyl or ethyl; and each R.sup.10 is independently a linear or branched alkyl group having from 1 to 24 and optionally containing an atom of group 15 of periodic table of elements or comprises a cyclic group having from 6 to 12 carbon atoms.

##STR00001##

Propylene is polymerised in the presence of a polymerisation catalyst comprising a solid catalyst component, an organoaluminium compound and an external electron donor, the process comprising the steps of (i) contacting propylene and hydrogen with the polymerisation catalyst in polymerisation conditions in a polymerisation reactor to produce a polymer of propylene; (ii) recovering the polymer of propylene from the polymerisation reactor; wherein the polymer of propylene has MFR of from more than 100 to 10000 g/10 min. The solid catalyst component comprises titanium, magnesium, halogen and an internal electron donor, characterised in that the internal electron donor is a compound according to formula (I) with R.sub.1 and R.sub.2 being the same or different and being a linear or branched C.sub.1-C.sub.12-alkyl group, and with R being H or a linear, branched or cyclic C.sub.1 to C.sub.12-alkyl, whereby it is preferred that R is not H. The external electron donor is a silane compound having the formula Si(OR.sup.11).sub.nR.sup.10.sub.4-n, wherein each R.sup.10 is independently a linear or branched C.sub.1-C.sub.4 alkyl, preferably methyl or ethyl; and each R.sup.10 is independently a linear or branched alkyl group having from 1 to 24 and optionally containing an atom of group 15 of periodic table of elements or comprises a cyclic group having from 6 to 12 carbon atoms.

##STR00001##

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.

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.

The present invention relates to a catalyst for propylene polymerization, a catalyst system for propylene polymerization and preparation and use thereof. The catalyst for propylene polymerization comprises: an activated magnesium halide, a titanium compound supported on the activated magnesium halide containing at least one Ti-halogen bond, and an internal electron donor compound selected from one or more of compounds having a structure of below Formula (1), wherein R.sub.1 and R.sub.6 are each independently selected from a C.sub.1-C.sub.12 straight or branched alkyl, a C.sub.3-C.sub.15 cycloalkyl or aryl, and R′ is H, a C.sub.1-C.sub.5 straight or branched alkyl, or phenyl; R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are each independently selected from H, halogen, a C.sub.1-C.sub.12 straight or branched alkyl, a C.sub.3-C.sub.8 cycloalkyl, a C.sub.6-C.sub.15 aryl, or arylalkyl. The present invention can provide a catalyst showing high polymerization reaction activity and excellent stereospecificity, by applying a novel type of internal electron donor.

##STR00001##

The present invention relates to a catalyst for propylene polymerization, a catalyst system for propylene polymerization and preparation and use thereof. The catalyst for propylene polymerization comprises: an activated magnesium halide, a titanium compound supported on the activated magnesium halide containing at least one Ti-halogen bond, and an internal electron donor compound selected from one or more of compounds having a structure of below Formula (1), wherein R.sub.1 and R.sub.6 are each independently selected from a C.sub.1-C.sub.12 straight or branched alkyl, a C.sub.3-C.sub.15 cycloalkyl or aryl, and R′ is H, a C.sub.1-C.sub.5 straight or branched alkyl, or phenyl; R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are each independently selected from H, halogen, a C.sub.1-C.sub.12 straight or branched alkyl, a C.sub.3-C.sub.8 cycloalkyl, a C.sub.6-C.sub.15 aryl, or arylalkyl. The present invention can provide a catalyst showing high polymerization reaction activity and excellent stereospecificity, by applying a novel type of internal electron donor.

##STR00001##

This invention relates to a novel group 2, 3 or 4 transition metal metallocene catalyst compound having at least one arenyl ligand substituted with: 1) a cyclopropyl group and, optionally, 2) at least one other group, such as a hydrocarbyl, a heteroatom or a heteroatom containing group.

This invention relates to a novel group 2, 3 or 4 transition metal metallocene catalyst compound having at least one arenyl ligand substituted with: 1) a cyclopropyl group and, optionally, 2) at least one other group, such as a hydrocarbyl, a heteroatom or a heteroatom containing group.