BE1025913A1 - CATALYST COMPONENT, CATALYST, AND PRE-POLYMERIZATION CATALYST FOR POLYMERIZING OLEFINS, AND PROCESS FOR OLEFIN POLYMERIZATION - Google Patents

Abstract

There is provided a catalyst component for the polymerization of olefins, a catalyst for the polymerization of olefins, a prepolymerization catalyst obtained by prepolymerization of the catalyst, and a process for the polymerization of olefins. The catalyst component for the polymerization of olefins includes magnesium, titanium, halogen, a Lewis A base compound as shown in formula (I), and another Lewis B base compound, in which a molar ratio of a total amount of Compound A and Compound B relative to magnesium is in a range of (0.03 to 0.20): 1. When the catalyst is used in the polymerization of olefins, particularly in the polymerization propylene, the catalyst has a high activity.

Description

CATALYST COMPONENT, CATALYST, AND PREPOLYMERIZATION CATALYST FOR POLYMERIZATION OF OLEFINS, AND METHOD FOR POLYMERIZATION OF OLEFINS

REFERENCE TO RELATED REQUESTS

The present application claims priority from Chinese patent application CN201610846996.7, entitled “Catalyst component, catalyst, and pre-polymerization catalyst for the polymerization of olefins, and process for the polymerization of olefins” and filed on 19 October 2017, all of which are incorporated herein by reference.

AREA OF DISCLOSURE

The present disclosure relates to the technical field of the polymerization of olefins, and in particular, a catalyst component for the polymerization of olefins, a catalyst for the polymerization of olefins, a pre-polymerization catalyst obtained by pre-polymerization of catalyst, and a process for the polymerization of olefins.

BACKGROUND TO THE DISCLOSURE

A Ziegler-Natta catalyst is generally composed of magnesium, titanium, a halogen, and a base of Lewis et cetera. Lewis base is an organic compound containing oxygen, nitrogen, phosphorus, silicon, and the like. Sometimes, to improve the overall performance of a catalyst, two or more Lewis base compounds are added during the preparation of the catalyst. For example, it is disclosed in Chinese patents 201310517877.3, 201310518069.9, 201310518086.2, and 201310518285.3 that the overall performance of a catalyst can be improved by using malonate compounds in conjunction with other Lewis base compounds, but that the activity of catalyst is not high enough, which is not beneficial for energy savings and increased efficiency. It is disclosed in Chinese patents CN201510708748.1 and CN201510708579.1 that phthalic anhydride is introduced into the above system, and that the activity of a catalyst is improved. However, the introduction of phthalic anhydride will result in a final catalyst more or less comprising a phthalate compound, and

BE2018 / 0128 a residue of the phthalate compound will ultimately remain in a polymer. The phthalate compound is an environmental hormone, which will influence human health, such as fertility and development, which makes it undesirable for the polymer to include such a substance.

Although research and development has been carried out for decades on the Ziegler-Natta catalyst, there remains a need to further improve the function of the catalyst in the field, in particular to achieve a balance between various properties of the catalyst. For example, solutions to avoid the presence of a phthalate compound in the catalyst while maintaining a high catalytic activity are sought.

SUMMARY OF THE DISCLOSURE

The present disclosure aims to provide a catalyst component, a catalyst, and a prepolymerization catalyst for the polymerization of olefins, and a process for the polymerization of olefins. When used for the polymerization of olefins, in particular for the polymerization of propylene, the catalyst component or the catalyst proposed here has a high catalytic activity, and does not comprise a phthalate compound.

According to a first aspect of the present disclosure, there is provided a catalyst component for the polymerization of olefins, comprising magnesium, titanium, a halogen, a Lewis base compound as shown in formula (I), and another Lewis B base compound, wherein a molar ratio of a total amount of compound A and compound B to magnesium is in the range of (0.03 to 0.20): 1,

COOR _a

COOR _b φ in formula (I), Ra and Rb may be the same or different from each other, chosen from substituted or unsubstituted C1 to C20 alkyl, substituted or unsubstituted C2 to C20 alkenyl, cycloalkyl to C3 to C20 substituted or unsubstituted, C6 to C20 aryl substituted or

BE2018 / 0128 unsubstituted, substituted or unsubstituted C7 to C20 alkaryl, substituted or unsubstituted C7 to C20 aralkyl or substituted or unsubstituted Cio to C20 polycyclic aromatic groups, preferably chosen from substituted C1 to C10 alkyl or unsubstituted linear or branched, C5 to C5 cycloalkyl substituted or unsubstituted, C6 to C10 aryl substituted or unsubstituted, C7 to C10 alkaryl substituted or unsubstituted, or C7 to C10 aralkyl substituted or unsubstituted, and so more preferred selected from substituted or unsubstituted C2 to C6 linear or branched alkyl; Rc and Rd may be the same or different from each other, chosen from hydrogen, substituted or unsubstituted C1 to C20 alkyl, substituted or unsubstituted C2 to C20 alkenyl linear or branched, substituted C3 to C20 cycloalkyl or unsubstituted, substituted or unsubstituted C6 to C20 aryl, substituted or unsubstituted C7 to C20 alkaryl, substituted or unsubstituted C7 to C20 aralkyl or substituted or unsubstituted Cio to C20 polycyclic aromatic groups, preferably selected from alkyl substituted or unsubstituted C 1 to C 10 linear or branched, substituted or unsubstituted C2 to C 10 alkenyl, substituted or unsubstituted C 5 to C 10 cycloalkyl, substituted or unsubstituted C 6 to C 10 aryl, substituted or unsubstituted C 7 to C 10 alkaryl substituted, substituted or unsubstituted C7 to C10 aralkyl or substituted or unsubstituted C10 to C15 polycyclic aromatic groups, more preferably selected from substituted or unsubstituted linear or branched C2 to C6 alkyl, substituted or unsubstituted C3 to C6 alkenyl, substituted or unsubstituted C6 to C6 aryl or substituted or unsubstituted and preferably C7 to C10 aralkyl linear or branched C2 to C6 or linear or branched C3 to C6 alkenyl; and Rc and Rd can be optionally linked together to form a cycle.

After careful study, the inventors of the present invention have found that when the molar ratio of a total amount of compound A and compound B to magnesium in the catalyst component is regulated within a range of (0.03 to 0.20): 1, preferably in a range of (0.03 to 0.17): 1, and more preferably in a range of (0.04 to 0.14): 1, catalytic activity of it can be significantly improved. According to certain embodiments, the molar ratio of a total amount of compound A and of compound B relative to magnesium can be 0.03: 1, 0.04: 1, 0.05: 1,

1, 0.18: 1, 0.19: 1, or 0.20: 1 and so on.

BE2018 / 0128

Furthermore, the inventors have found that when a molar ratio of compound A to compound B is regulated within a specific range, the catalytic activity thereof can be significantly improved. According to a preferred embodiment of the present disclosure, in the catalyst component, the molar ratio of compound A to compound B is in a range of (0.21 to 2.0): 1, preferably (0, 3 to 1.6): 1, more preferably from (0.4 to 1.5): 1, and most preferably (0.5 to 1.4): 1. According to certain embodiments, the molar ratio of compound A on compound B can be 0.3: 1, 0.4: 1, 0.5: 1, 0.6: 1, 0.7: 1, 0, 8: 1, 0.9: 1, 1.0: 1, 1.1: 1, 1.2: 1, 1.3: 1, 1.4: 1, 1.5: 1, 1.6: 1, 1.7: 1, 1.8: 1, or 1.9: 1 and so on.

In the present disclosure, the term "C1 to C20 alkyl" refers to linear C1 to C20 alkyl or branched C3 to C20 alkyl, and includes, but is not limited to, methyl, ethyl, n-propyl , isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, tert-pentyl, neopentyl, n-hexyl, n-heptyl, n-octyl and n-decyl.

In the present disclosure, examples of C3 to C20 cycloalkyl include, but are not limited to, cyclopropyl, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, 4-ethylcyclohexyl, 4-n-propylcyclohexyl and 4-n-butylcyclohexyl.

In the present disclosure, examples of C8 to C20 aryl include, but are not limited to, phenyl, 4-methylphenyl, 4-ethylphenyl, dimethylphenyl, vinylphenyl.

In the present disclosure, the term "C2 to C20 alkenyl" refers to a linear C1 to C20 alkenyl or a branched C3 to C20 alkenyl, and includes, but is not limited to, vinyl, allyl, and butenyl.

In the present disclosure, examples of C7 to C20 aralkyl include, but are not limited to, phenylmethyl, phenylethyl, phenyl-n-propyl, phenylisopropyl, phenyl-n-butyl and phenyl-tert-butyl.

In the present disclosure, examples of C7 to C20 alkaryl include, but are not limited to, tolyl, ethylphenyl, n-propylphenyl, isopropylphenyl, n-butylphenyl and tert-butylphenyl.

BE2018 / 0128

In the present disclosure, examples of Cio to C20 polycyclic aromatic groups include, but are not limited to, naphthyl, anthracenyl, phenanthryl, fluorenyl.

Specifically, the compound as shown in formula (I) is preferably chosen from the group consisting of diethyl dipropylmalonate, dipropyl dipropylmalonate, diethyl diisobutylmalonate, diethyl di-n-butylmalonate, di-tert diethyl butylmalonate, diethyl dibenzylmalonate, diethyl phenylethylmalonate, dipropyl diisobutylmalonate, dipropyl di-n-butylmalonate, dipropyl di-tert-butylmalonate, dibutyl diisobutylmalonate, diibutyl dialon dibutyl, dibutyl di-tert-butylmalonate, dipentyl diisobutylmalonate, dipentyl di-n-butylmalonate, dipentyl di-tert-butylmalonate, dihexyl diisobutylmalonate, dihexyl di-n-butylmalonate, dihexyl tert-butylmalonate, diheptyl diisobutylmalonate, diheptyl di-n-butylmalonate, diheptyl di-tert-butylmalonate, dipropyl diisoamylmalonate, dipropyl di-n-pentylmalonate, dih dipropyl exylmalonate, dipropyl phenylethylmalonate, dipropyl phenylmethylmalonate, dipropyl phenylpropylmalonate, dipropyl phenyl-n-butylmalonate, dipropyl phenylisobutylmalonate, phenylisopentylmalonate dipropylmalonate, dipropylmalonate dipropyl, dipropyl benzylethylmalonate, dipropyl benzylmalonate, dipropyl benzylpropylmalonate, dipropyl benzylisobutylmalonate, dibutyl phenylethylmalonate, phenylpropylmalonate, dibutyl phenylpropylmalonate dibutyl, dibutyl benzylethylmalonate, dibutyl benzylpropylmalonate, dibutyl benzylisobutylmalonate, dibutyl benzyl-n-pentylmalonate, dipentyl phenylethylmalonate, dipentyl phenylpropylmalonate, benzyl-nylpropylmalonate e dipropyl dibenzylmalonate, dibutyl phenylmethylmalonate, dibutyl phenyl-n-butylmalonate, dibutyl phenylisopentylmalonate, dibutyl diphenylmalonate, dibutyl benzylmethylmethylate, benzyl n-butylbutyl dibutyl dibutyl dibenzylmalonate, dipentyl phenylmethylmalonate, dipentyl phenyl-n-butylmalonate,

BE2018 / 0128

dipentyl phenylisobutylmalonate, phenylisopentylmalonate of dipentyl Ie dipentyl phenyl-n-pentylmalonate, diphenylmalonate of dipentyl Ie dipentyl benzylethylmalonate, benzylmethylmalonate of dipentyl Ie dipentyl benzylpropylmalonate, benzyl-n-butylmalonate of dipentyl Ie dipentyl benzylisobutylmalonate, benzylisopentylmalonate of dipentyl Ie dipentyl benzyl-n-pentylmalonate, dibenzylmalonate of dipentyl Ie

dicyclohexylphenylethylmalonate, dicyclohexyl phenylmalonate, dicyclohexyl phenylpropylmalonate, dicyclohexyl phenylisobutylmalonate, phenylisopentylmethylate dicyclohexylphenyl benzyléthylmalonate dicyclohexyl Ie benzylméthylmalonate dicyclohexyl Ie benzylpropylmalonate dicyclohexyl Ie benzyl-n-butylmalonate, dicyclohexyl Ie benzylisobutylmalonate dicyclohexyl Ie benzylisopentylmalonate dicyclohexyl Ie benzyl-n-pentylmalonate dicyclohexyl Ie dibenzylmalonate, dicyclohexyl Ie 15 phénylméthylmalonate diphenyl, diphenyl phenylpropylmalonate, diphenyl phenyl-n-butylmalonate, diphenyl phenylisobutylmalonate, diphenyl phenylisopentylmalonate, diphenyl phenyl-n-pentylmalonate, diphenyl benzene diphenyl Diphenyl lonate, Diphenyl benzylmethylmalonate, Diphenyl benzylpropylmalonate, Diphenyl benzyl-n-butylmalonate, Diphenyl benzylisobutylmalonate, Diphenyl benzonisylphenonate, Diphenyl benzonyl diphenylphenonylphenonate dicyclohexyl, dicyclohexyl fluorenylpropylmalonate, dicyclohexyl fluorenyl-n-butylmalonate, dicyclohexyl fluorenylisobutylmalonate dicyclohemylate dicyclohemylate dicyclohemylate diphenyl allyl propylmalonate, diphenyl allyl-n-butylmalonate, diphenyl allylisobutylmalonate, diphenyl allylisopentylmalonate, diphenyl allyl-n-pentylmalonate, diphenyl diallylmalonate, allyl dimethyl allyl dimethyl allylpropylmalonate, a dimethyl llyl-n-butylmalonate, dimethyl allylisobutylmalonate, dimethyl allylisopentylmalonate, dimethyl allyl-n-pentylmalonate, dimethyl diallylmalonate, diethyl allylmethylmalonate, allylpropylmalonate diethyl n-butylmalonate, diethyl allylisobutylmalonate,

BE2018 / 0128 diethyl allylisopentylmalonate, diethyl allyl-n-pentylmalonate, diethyl diallylmalonate, dipropyl allylmethylmalonate, dipropyl allylpropylmalonate, dipropyl allyl-n-butylmalonate, allyl butylmalonate dipropyl, dipropyl allylisopentylmalonate, dipropyl allyl-n-pentylmalonate, dipropyl diallylmalonate, dibutyl allylmethylmalonate, dibutyl allylpropylmalonate, dibutyl allyl-n-butylmalonate, allylobutyl , dibutyl allylisopentylmalonate, dibutyl allyl-n-pentylmalonate, dibutyl diallylmalonate, dipentyl allylmethylmalonate, dipentyl allylpropylmalonate, dipentyl allyl-n-butylmalonate, allylisobutyl dipentyl allylisopentylmalonate, dipentyl allyl-n-pentylmalonate, dipentyl diallylmalonate, dicyclohexyl allylmethylmalonate, allylpropylmalona dicyclohexyl te, dicyclohexyl allyl-n-butylmalonate, dicyclohexyl allylisobutylmalonate, dicyclohexyl allylisopentylmalonate, dicyclohexyl allyl-n-pentylmalonate and the preferred dicycloheyl diallylmalonate dialonlmalonate diethyl, diethyl di-n-butyl malonate, diethyl di-tert-butylmalonate, dipropyl diisobutylmalonate, dipropyl di-n-butylmalonate, dipropyl di-tert-butylmalonate, diethyl dibenzylmalonate, dipropyl dibenzylmalonate, diethyl phenylethylmalonate, dipropyl phenylethylmalonate, diethyl dipropylmalonate, dipropyl dipropylmalonate, diethyl diallylmalonate and dipropyl diallylmalonate.

According to the present disclosure, the other Lewis B base compound refers to another Lewis base which differs from Compound A.

According to one embodiment of the present disclosure, compound B is at least one of an ether compound, a monocarboxylic ester compound, and a dicarboxylic ester compound. Preferably, compound B is at least one of a 1,3-diether compound, a polyol (polyphenol) ester compound, and a succinic acid ester compound.

More preferably, compound B is at least one compound as shown in formula (II), ⁰ ?

he he

R _r C-0 - Μ-- ° “C- ^R 2 _(n ) in which Ri and R ₂ are the same or different from each other, chosen from alkyl in

BE2018 / 0128

C1 to C20 substituted or unsubstituted, C2 to C20 alkenyl substituted or unsubstituted, C3 to C20 cycloalkyl substituted or unsubstituted, Cf aryl, C20 substituted or unsubstituted, C7 to C20 alkaryl substituted or unsubstituted, aralkyl substituted or unsubstituted C7 to C20, or substituted or unsubstituted C10 to C20 polycyclic aromatic groups; and Μ is a divalent linking group, preferably selected from a group consisting of C1 to C20 alkylene, C3 to C20 cycloalkylene, C6 to C20 arylene and one of their combinations. The alkylene, cycloalkylene, and / or arylene are optionally substituted with C1-C20 alkyl, and the substituent is optionally linked to form one ring or a plurality of rings. A carbon atom and / or a hydrogen atom in Μ are optionally substituted by a nitrogen, oxygen, sulfur, silicon, phosphorus or halogen atom.

According to a preferred embodiment of the present disclosure, Μ is chosen from at least one of the divalent groups as shown in formula (III), formula (IV), formula (V), formula (VI) , and formula (VII):

Formula (III) Formula (IV) Formula (V) Formula (VI) Formula (VII).

In formula (III), R'3 to R's are the same or different from each other, chosen from substituted or unsubstituted C1 to C20 alkyl, substituted or unsubstituted C2 to C20 alkenyl, substituted or substituted C3 to C20 cycloalkyl unsubstituted, Cf, C20 substituted or unsubstituted aryl, C7 to C20 substituted or unsubstituted alkaryl, substituted or unsubstituted C7 to C20 aralkyl, or substituted or unsubstituted C10 to C20 polycyclic aromatic groups, or ester to Ci to C20 substituted or unsubstituted, and R'7 and R's are optionally linked to a cycle or a plurality of cycles.

In formula (IV), R ¹ to R ⁴ are identical or different from each other, chosen from a group consisting of hydrogen, halogen, substituted or unsubstituted C1 to C20 alkyl, substituted or unsubstituted C2 to C20 alkenyl , substituted or unsubstituted C3 to C20 cycloalkyl, substituted or unsubstituted C6 to C20 aryl, substituted or unsubstituted C7 to C20 alkaryl, substituted or unsubstituted C7 to C20 aralkyl, or substituted Cio to C20 polycyclic aromatic groups or unsubstituted, and R ¹ to R ⁴ are linked to a ring or a

BE2018 / 0128 plurality of cycles.

In formula (V), formula (VI), and formula (VII), R3, R4, and R5 are independently selected from hydrogen, halogen, substituted or unsubstituted C1 to C20 alkyl, substituted C2 to C20 alkenyl or unsubstituted, C3 to C20 substituted or unsubstituted cycloalkyl, substituted or unsubstituted C to C20 aryl, substituted or unsubstituted C7 to C20 alkaryl, substituted or unsubstituted C7 to C20 aralkyl, or C10 polycyclic aromatic groups to C20 substituted or unsubstituted.

In the present disclosure, the term "substituted or unsubstituted" means that a hydrogen atom which is bonded to a carbon of the group described may be substituted by a group which is selected from a group consisting of C1-C10 alkyl , C 2 -C 10 alkenyl, C 2 -C 20 alkynyl, halogen, nitro group, cyano group, C 2 -C 10 aminoalkyl and other common substitution groups.

Specifically, the compound as shown in formula (II) is preferably chosen from a group consisting of 2,4-pentanediol dibenzoate, dibenzoate of

2.4- di-n-propyl pentanediol, 3,5-heptanediol dibenzoate, dibenzoate

3.5- heptanediol di-n-propyl, 4-ethyl-3,5 heptanediol dibenzoate, 3,5-heptanediol di-p-methylbenzoate, 3,5-heptanediol di-o-methyl benzoate, di 3,5-heptanediol p-chloro benzoate, 3,5-heptanediol di-o-chloro benzoate, 3,5-heptanediol di-p-methoxyl benzoate, 3-di-o-methoxyl benzoate, 5-heptanediol, 3,5-heptanediol di-m-methoxyl benzoate, 2-methyl-3,5-heptanediol dibenzoate, 4-methyl-3,5-heptanediol dibenzoate, 6-methyl dibenzoate -3,5-heptanediol, 4-ethyl-3,5-heptanediol dibenzoate, 5-ethyl-3,5-heptanediol dibenzoate, 4-propyl-3,5-heptanediol dibenzoate, 4 dibenzoate -butyl-3,5-heptanediol, the dibenzoate of

2,4- dimethyl-3,5-heptanediol, the dibenzoate of 2,6-dimethyl-3,5-heptanediol, the dibenzoate of

4.4- dimethyl-3,5-heptanediol, the dibenzoate of 6,6-dimethyl-3,5-heptanediol, the dibenzoate of

4.6- dimethyl-3,5-heptanediol, the dibenzoate of 4,4-dimethyl-3,5-heptanediol, the dibenzoate of

6.6- dimethyl-3,5-heptanediol, 2-methyl-4-ethyl-3,5-heptanediol dibenzoate, 4-methyl-4-ethyl-3,5-heptanediol dibenzoate, 2-methyl dibenzoate -4-propyl-3,5-heptanediol, 4-methyl-4-propyl-3,5-heptanediol dibenzoate, 6-methyl-2,4-heptanediol (p-chlorobenzoic acid) diester, diester of (acid

BE2018 / 0128 p-methylbenzoic acid) of 6-methyl-2,4-heptanediol, the diester of (m-methylbenzoic acid) of 6-methyl-2,4-heptanediol, 2,2,6,6-tetramethyl dibenzoate -3,5-heptanediol, 4-methyl-3,5-octanediol dibenzoate, 4-ethyl-3,5-octanediol dibenzoate, 4-propyl-3,5-octanediol dibenzoate, 4 dibenzoate -butyl-3,5-octanediol, the dibenzoate of

4.4- dimethyl-3,5-octanediol, 4-methyl-4-ethyl-3,5-octanediol dibenzoate, 2-methyl-4-ethyl-3,5-octanediol dibenzoate, 2-methyl dibenzoate -6-ethyl-3,5-octanediol, 5-methyl-4,6 nonanediol dibenzoate, 5-ethyl-4,6 nonanediol dibenzoate, 5-propyl-4,6 nonanediol dibenzoate, dibenzoate 5-butyl-4,6 nonanediol, 5,5-dimethyl-4,6 nonanediol dibenzoate, 5-methyl-4-ethyl-4,6 nonanediol dibenzoate, 5-phenyl-4,6 nonanediol dibenzoate , 4,6-nonanediol dibenzoate, 4-butyl-3,5-heptanediol dibenzoate, 1,2-phenylene dibenzoate, 3-methyl-5-tert-butyl-1,2-phenylene dibenzoate , 3,5-diisopropyl-1,2-phenylene dibenzoate, 3,6-dimethyl-1,2-phenylene dibenzoate, 4-tert-butyl-1,2-phenylene dibenzoate, 1-dibenzoate , 2-naphthalene, 2,3-naphthalene dibenzoate, dibenzoic acid 1,8-naphthylate, di-4-methyl benzoic acid 1,8-naphthylate, acid 1,8-naphthylate di-3-methyl benzoic acid 1,8-naphthylate di-2-methyl benzoic acid 1,8-naphthylate di-4-ethyl benzoic acid 1,8-naphthylate di- 4-n-propyl benzoic acid, di-4-isopropyl benzoic acid 1,8-naphthylate, di-4-n-butyl benzoic acid 1,8-naphthylate, acid 1,8-naphthylate di-4-isobutyl benzoic acid, 1,8-naphthylate di-4-tert-butyl benzoic acid, 1,8-naphthylate di-4-phenyl benzoic acid, 1,8-naphthylate acid di-4-fluorobenzoic acid, di-3-fluorobenzoic acid 1,8-naphthylate, and di-2-fluorobenzoic acid 1,8-naphthylate.

According to a preferred embodiment of the present disclosure, in the catalyst component, a magnesium content measured by the magnesium element is 10 to 25% by weight; a titanium content measured by the titanium element is from 1 to 7% by weight; a content of compound A is from 1 to 20% by weight; and a content of compound B is from 1 to 20% by weight.

According to a preferred embodiment of the present disclosure, when the compound A is di-n-butyl diethyl malonate, and the compound B is the di-n-propyl benzoate of

2.4- pentanediol, the molar ratio of compound A to compound B is (0.6 to 1.0): 1, and the molar ratio of a total amount of compound A and compound B to magnesium is (0, 1 to 0.14): 1, the catalyst obtained has an extremely high catalytic activity.

BE2018 / 0128

The catalyst component in the present disclosure can be prepared by a process comprising the following steps of contacting a magnesium compound, a titanium compound, the compound as shown in formula (I), and compound as shown in formula (Π) with each other so as to obtain the catalyst component.

In a specific embodiment of the present disclosure, the catalyst component is prepared by a process comprising the following steps.

1) A magnesium compound is dissolved in a system comprising compound A, and a precipitation agent is added to precipitate solids.

2) The solids precipitated in step 1) are treated with a titanium compound, and the compound B is added thereto and / or before a process for treating the solids with the titanium compound.

In step 1), "a magnesium compound being dissolved in a system comprising compound A" includes two circumstances: a magnesium compound is first dissolved in a solvent system to obtain a solution, then compound A is added; and a magnesium compound is dissolved in a system consisting of compound A and a solvent system combined.

In the present disclosure, the magnesium compound may be selected from a group consisting of a magnesium dihalide, an alkoxy magnesium, an alkyl magnesium, a hydrate or an alcohol adduct of magnesium dihalide, or a derivative formed by replacing an atom of halogen of magnesium dihalide by an alkoxy or a haloalkoxy; and preferably, the magnesium compound is chosen from a group consisting of a magnesium dihalide or an alcohol adduct of magnesium dihalide, such as magnesium dichloride, magnesium dibromide, magnesium diiodide and an alcohol adduct of that -this.

In the present disclosure, the titanium compound may be a titanium compound shown

BE2018 / 0128 with the formula TiX _m (OR ') 4- _m . In the formula, R′ is C1 to C20 hydrocarbyl, X is halogen, and 1 <m <4. The titanium compound is preferably chosen from a group consisting of titanium tetrachloride, titanium tetrabromide, titanium tetraiodide , titanium tetrabutoxylate, titanium tetraethoxylate, titanium monochlorotriethoxylate, titanium dichlorodiethoxylate, or titanium trichloromonoethoxylate, and is more preferably titanium tetrachloride.

In the present disclosure, the precipitation agent can be chosen from metal halides, such as titanium halides, iron halides or zinc halides; preferably, the precipitation agent is a titanium halide, such as a titanium tetrachloride or a titanium tetrabromide; and more preferably, the precipitating agent is titanium tetrachloride.

A solid catalyst component of the present disclosure can be prepared by a following process, but a process for preparing the catalyst component involved in the present disclosure is not limited to.

First, a magnesium compound is dissolved in a solvent system consisting of an organic epoxy compound, an organic phosphorus compound, and an inert diluent so as to form a uniform solution. After that, in the presence of a co-precipitation agent having a special structure, i.e., in the presence of compound A as shown in formula (I), the uniform solution obtained is mixed with a precipitation agent (such as a titanium compound). Then the temperature is increased, and a solid precipitates. The solid is treated with an electron donor so that the electron donor is charged to the solid. Then, the solid is treated with a titanium tetrahalide or with a titanium tetrahalide and the inert diluent.

The organic epoxide compound, the organic phosphorus compound, and the co-precipitation agent are disclosed in Chinese patent CN85100997, and a relevant content is cited therein.

Specifically, the magnesium compound can be dissolved in a solvent system consisting of the organic epoxy compound and the organic phosphorus compound. The compound

BE2018 / 0128 organic epoxide comprises at least one of an aliphatic olefin of 2 to 8 carbon atoms, a dialcene, a halogenated aliphatic olefin, a dialcene oxide, glycidyl ethers and internal ethers. The specific compounds are as follows: ethylene oxide, propylene oxide, butylene oxide, butadiene oxide, butadiene dioxide, epoxy chloropropane, methyl glycidyl ether, diglycidyl ether, and tetrahydrofuran.

The organic phosphorus compound is at least one element chosen from trimethyl orthophosphate, triethyl orthophosphate, tributyl orthophosphate, triphenyl orthophosphate, trimethyl phosphite, triethyl phosphite, tributyl phosphite, and phosphate of triphenylmethyl.

In a specific embodiment, the solid catalyst component of the present disclosure is prepared according to a method disclosed in patent CN85100997. First, a magnesium compound is dissolved in a solvent system consisting of an organic epoxy compound, an organic phosphorus compound, and an inert diluent so as to form a uniform solution. After that, the uniform solution obtained is mixed with a titanium compound in the presence of a co-precipitating agent having a special structure, i.e., in the presence of compound A as shown in formula (I). At a temperature in the range of -40 to 50 ° C, at best in the range of -35 to 0 ° C, the titanium compound is poured dropwise into the above magnesium halide solution. Then, the temperature of the reaction mixture is increased in the range of 60 to 80 ° C, and an electron donor compound is added thereto. A suspension liquid is stirred for 0 to 3 hours at this temperature, then the mother liquor is removed therefrom by filtration. After washing with an inert diluent is carried out, a solid is obtained. Thereafter, treatment with a mixture of a titanium halide and an inert diluent at a temperature in the range of 60 to 130 ° C is carried out for 1 to 5 times. A solid obtained is washed with an inert diluent, and a solid catalyst is obtained after drying is carried out. Measured by magnesium mole, a dosage of the organic epoxy compound is in the range of 0.2 to 10 moles; an assay of the organic phosphorus compound is in a range of 0.1 to 3 mol; the compound as shown in formula (I) is in a range of 0.001 to 30 moles, preferably in a range

BE2018 / 0128 range from 0.05 to 15 moles; a titanium compound dosage is in a range of 3 to 40 moles, preferably in a range of 5 to 30 moles; and a dosage of the electron donor compound is in a range of 0.005 to 15 moles, preferably in a range of 0.05 to 5 moles.

According to a second aspect of the present disclosure, a catalyst is proposed for the polymerization of olefins, comprising a reaction product of the following components:

at. the above catalyst component;

b. an aluminum alkyl compound, which is preferably an aluminum aluminum compound represented by the formula AlR ” _n X3-n, wherein R” is hydrogen or C1 to C20 hydrocarbyl, X is halogen, and 0 <n <3, the aluminum alkyl compound can be specifically selected from the group consisting of triethylaluminium, tripropylaluminium, tri-n-butylaluminium, triisobutylaluminium, tri-n-octylaluminium, diethylaluminium hydride, diisobutylaluminium hydride, diethylaluminium chloride, chloride diisobutylaluminium, sesquiethyl aluminum chloride, ethylaluminium dichloride, and is preferably chosen from triethylaluminium and triisobutylaluminium;

vs. optionally, an external electron donor component, which is preferably an organosilicon compound represented by the formula (R ⁵ ) kSi (OR ⁶ ) 4-k- In the formula, 0 <k <3; R ⁵ is chosen from halogen, hydrogen atom, linear or branched alkyl or haloalkyl, C3 to C20 cycloalkyl, C6 to C20 aryl or amino; and R ⁶ is linear or branched alkyl or haloalkyl, C3 to C20 cycloalkyl, C6 to C20 aryl or amino.

The expression "optionally, an external electron donor component" means that the external electron donor component can be chosen or not if necessary. When a high stereoregular olefin polymer is required, it is required to add the external electrodonor. Specifically, the organosilicon compound includes, but is not limited to, trimethylmethoxysilicane, trimethylethyloxy silylane, dimethyldimethoxysilicane, dimethyldiethyoxylsilicane, diphenyl dimethoxysilicane, diphenyl diethyethylphenyl triethyloxyiloxy phenyl triethyl, phenyl diethylphenyl,

BE2018 / 0128 cyclohexylmethyldimethoxysilicane and methyltert-butyldimethoxysilican, preferably chosen from cyclohexylmethyldimethoxysilican and diphenyl dimethoxysilican.

In the above catalyst system, preferably, a molar ratio of component a and component b measured by titanium on aluminum is in a range of 1: (5 to 1000), preferably 1: (25 to 100) ; and a molar ratio of component c and component a measured by T external electron donor on the titanium is (0 to 500): 1, preferably (25 to 100): 1.

According to a third aspect of the present disclosure, there is provided a prepolymerization catalyst for the polymerization of olefins, comprising a prepolymer obtained by prepolymerization of the above catalyst component and / or of the above catalyst with the olefin. A multiple of the prepolymer is 0.1 to 1000 g of olefin prepolymer / g or of the catalyst component, and preferably a multiple of the prepolymer is 0.2 to 500 g of prepolymer / g of solid catalyst component.

A pre-polymerization process can be carried out at a temperature in the range of -20 to 80 ° C, preferably in the range of 0 to 50 ° C, in the gas phase or in the liquid phase. Steps of the pre-polymerization as part of a continuous polymerization process can be carried out online, and also separately in batches.

According to a fourth aspect of the present disclosure, there is provided a process for the polymerization of olefins, carried out in the presence of at least one of the above catalyst component, the above catalyst, and the pre catalyst. -polymerization above. Preferably, the olefin is represented by the formula CH2 = CHR "’. In the formula, R ’” is hydrogen, C1-C12 alkyl or C6-C12 aryl. The olefin includes, but is not limited to, ethylene, propylene, 1-butylene, 4-methyl-1-amylene, and 1-hexene, and more preferably the olefin is ethylene or propylene. The process for the polymerization of olefins is particularly suitable for the polymerization of propylene or for the

BE2018 / 0128 copolymerization of propylene and another olefin.

The catalyst of the present disclosure can be directly added to a reactor for use in a polymerization process; or else the catalyst can be subjected to a pre-polymerization so as to obtain a pre-polymerization catalyst, in the presence of which a subsequent polymerization of the olefin can be carried out.

The polymerization of olefins in the present disclosure can be carried out, according to the known technique, in a liquid phase or a gas phase, or one of their combinations. Common techniques such as a slip polymerization process and a gas phase fluidized bed process can be used. It is best to use the following reaction conditions: a polymerization temperature is in a range of 0 to 150 ° C, preferably in a range of 60 to 90 ° C; and a polymerization pressure is in the range of 0.01 to 10 MPa.

According to the present disclosure, in a process for preparing the catalyst component, when compound A as shown in formula (I) and another Lewis B base compound, in particular a diol ester compound, are added, a catalyst obtained has good fluidity, good particle morphology, uniform particle size distribution and excellent overall performance. When the catalyst is used in the polymerization of olefins, in particular the polymerization of propylene, the catalyst has a high activity, and a polymer obtained does not contain a phthalate compound.

Other features and advantages of this disclosure will be explained further in the following detailed description of the embodiments.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Preferred embodiments will be explained in detail in the following description. Although preferred embodiments of the present disclosure are described in the

BE2018 / 0128 Following description, it should be understood that the present disclosure can be implemented in various ways and should not be limited to embodiments developed here.

Measuring method

Measurement of substance soluble in xylene (XS): the substances soluble in xylene are measured according to standard GB / T24282-2009.

The measurement of a content of Lewis base compounds (including compound A and compound B) is as follows. A content of Lewis base compounds in the catalyst is measured using a Waters 600 E high performance liquid chromatograph. First, a pre-treatment is carried out on a sample using a system of ethyl acetate - hydrochloric acid solution diluted so as to extract the Lewis base compounds. A high performance liquid chromatograph is used to separate the Lewis base compounds and measure a peak area, and an external standard curve is used for correction. A calculation is carried out so as to obtain a percentage content of the Lewis base compounds in the sample.

Polymerization of propylene

32.5 mmol of AlEt3 and 0.01 mmol of methyl cyclohexyl dimethoxy silicane (CHMMS) were placed in a stainless reactor with a volume of 5 L and replaced sufficiently with propylene gas, then 10 mg of the solid catalyst component prepared according to the following examples and comparative examples and 1.2 L of hydrogen gas. 2.3 L of liquid propylene were added to the resulting mixture. The resulting mixture was heated to 70 ° C and kept at 70 ° C for 1 hour. Then, cooling and pressure relief were carried out, so that a PP powder could be obtained. See Table 1 for specific data.

Examples 1 to 10 and Comparative Examples 1 to 4

Catalyst component preparation

BE2018 / 0128

5.0 g of magnesium chloride, 98 ml of methylbenzene, 4.2 ml of chloropropane epoxy, and 13.0 ml of tributyl phosphate (TBP) were placed one by one in a reactor sufficiently replaced with high purity nitrogen. With stirring, the resulting mixture was heated to 50 ° C and kept at this temperature for 2.5 hours. After the solid had completely dissolved, a certain amount of compound A was added to the solution obtained. The solution was kept for 1 hour. Then, the solution was cooled to a temperature below -25 ° C. 47 mL of TiCL was added dropwise to the solution over the course of an hour, and the solution was slowly heated to 80 ° C to precipitate the solid. Then, a certain amount of compound B was added to the solid. The mixture obtained was kept for

1 hour at 80 ° C. Then, the obtained mixture was filtered, and after that, the obtained mixture was washed twice using 70 ml of methylbenzene respectively to obtain a solid precipitate. A solution of 40 mL TiCU / 60 mL methylbenzene was added to the solid precipitate. The mixture obtained was heated to 110 ° C, kept for 1 hour, and filtered; and the same operations were repeated three times. Then, the resulting mixture was washed twice with hexane at 70 ° C, and washed twice with hexane at room temperature, respectively, so as to obtain a catalyst component (solid) . See Table 1 for specific components and specific dosage of Compound A and Compound B.

Table 1

Number Compound A Compound B Activity KgPP / gcat / h XS % A / B mol / mol (A + B) / Mg mole / mole Example 1 diethyl di-n-butylma lonate 2,4-pentanediol di-n-propyl benzoate 92.3 1.5 0.8 0.13 Example 2 diethyl di-n-butyl malonate dibenzoate from 2,4-pentanediol 80.3 2.3 0.5 0.08 Example 3 diethyl di-n-butyl malonate dibenzoate from 3,5-heptanediol 74.7 2.5 1.4 0.20 Example 4 diallyl dibenzoate from 79.0 1.9 0.9 0.14

BE2018 / 0128

diethyl malonate 3,5-heptanediol Example 5 diethyl diisobutyl malonate dibenzoate from 3,5-heptanediol 73.4 2.5 1.0 0.09 Example 6 diethyl di-n-butylma lonate dibenzoate from 3,5-heptanediol 69.6 2.8 0.4 0.05 Example 7 diethyl diisobutylma lonate dibenzoate from 3,5-heptanediol 70.5 2.9 1.0 0.05 Example 8 diethyl diisobutyl malonate dibenzoate from 3,5-heptanediol 68.7 2.3 1.0 0.14 Example 9 diethyl diisobutyl malonate dibenzoate from 3,5-heptanediol 67.8 2.5 0.5 0.09 Example 10 diethyl di-n-butyl malonate dibenzoate from 4-ethyl-3,5-heptanediol 65.1 2.7 0.7 0.10 Comparative example 1 diethyl diisobutylma lonate dibenzoate from 3,5-heptanediol 39.2 2.0 1.0 0.28 Comparative example 2 diethyl diisobutylma lonate dibenzoate from 3,5-heptanediol 35.4 3.5 1.0 0.02 Comparative example 3 diethyl diisobutylma lonate dibenzoate from 3,5-heptanediol 53.7 2.7 0.05 0.09 Comparative example 4 diethyl diisobutylma lonate dibenzoate from 3,5-heptanediol 38.2 2.9 0.3 0,015

BE2018 / 0128

Comparative example 5 diethyl diisobutylma lonate dibenzoate from 3,5-heptanediol 32.1 2.6 2.3 0.21

In Table 1, A / B represents a molar ratio of compound A to compound B, and (A + B) / Mg represents a molar ratio of a total amount of compound A and compound B to magnesium.

It can be seen from the data in Table 1 that a catalyst having a high activity is obtained by controlling the molar ratio of the total content of the malonate compound and of another internal electron donor compound to the magnesium in the catalyst component in the specific range, there can be obtained a catalyst having a higher activity. In addition, by regulating the molar ratio of the malonate compound to the other internal electron donor compound in the catalyst component within the specific range, the activity of the catalyst can be improved. In addition, the polymer obtained by using the catalyst component or according to the catalyst does not contain a phthalate compound.

It should be noted that the above embodiments are provided only by way of illustration of this disclosure, rather than restricting this disclosure. Amendments may be made to this disclosure based on the disclosure of the claims and in the scope and spirit of this disclosure. While the above descriptions about this disclosure involve particular methods, materials, and working examples, this does not mean that this disclosure is limited to the examples presently disclosed. On the contrary, this disclosure can be extended to other processes and applications having the same functions as those of this disclosure.

Claims (13)

CLAIMS 1. A catalyst component for the polymerization of olefins, comprising magnesium, titanium, halogen, a Lewis base compound as shown in formula (I), and another Lewis B base compound, in which a molar ratio of a total amount of compound A and compound B to magnesium is in the range of (0.03 to 0.20): 1, COORa COORb φ in which Ra and Rb may be the same or different from each other, selected from a group consisting of substituted or unsubstituted C1 to C20 alkyl, substituted or unsubstituted C2 to C20 alkenyl, substituted or unsubstituted C3 to C20 cycloalkyl, substituted C6 to C20 aryl or unsubstituted, substituted or unsubstituted C7 to C20 alkaryl, substituted or unsubstituted C7 to C20 aralkyl or substituted or unsubstituted C10 to C20 polycyclic aromatic groups, preferably selected from a group consisting of C1 to C10 alkyl Overwrite ue or unsubstituted, substituted or unsubstituted C5 to C5 cycloalkyl, substituted or unsubstituted C6 to C10 aryl, substituted or unsubstituted C7 to C10 alkaryl, or substituted or unsubstituted C1 to C10 aralkyl, and more preferred selected from a group consisting of substituted or unsubstituted C2 to C6 alkyl; Rc and R (i may be the same or different from each other, selected from a group consisting of hydrogen, substituted or unsubstituted C1 to C20 alkyl, substituted or unsubstituted C2 to C20 alkenyl, C3 to cycloalkyl Substituted or unsubstituted C20, substituted or unsubstituted C6 to C20 aryl, substituted or unsubstituted C7 to C20 alkaryl, substituted or unsubstituted C7 to C20 aralkyl or substituted or unsubstituted Cio to C20 polycyclic aromatic groups selected from a group consisting of substituted or unsubstituted C1 to C10 alkyl, substituted or unsubstituted C2 to C10 alkenyl, substituted or unsubstituted C5 to C10 cycloalkyl, substituted or unsubstituted C6 to Cio aryl, C7 to alkaryl Substituted or unsubstituted Cio, substituted or unsubstituted C7 to C10 aralkyl or substituted or unsubstituted Cio to C15 polycyclic aromatic groups, more preferably selected is in a group consisting of substituted or unsubstituted C 2 to C 6 alkyl, substituted or unsubstituted C 3 to C 6 alkenyl, BE2018 / 0128 substituted or unsubstituted C 6 to C 6 aryl or substituted or unsubstituted C 7 to C 10 aralkyl; and R "and Ra can be optionally linked together to form a cycle. 1) dissolving a magnesium compound in a system comprising a compound A, and adding a precipitation agent so as to precipitate solids; and 1.0.19: 1, or 0.20: 1. 2) treatment of the solids precipitated in step 1) with a titanium compound, and addition of a compound B in and / or before a process of treatment of the solids with the titanium compound. 2. The catalyst component according to claim 1, in which a molar ratio of compound A with respect to compound B is (0.21 to 2.0): 1, preferably (0.3 to 1.6): 1, more preferably (0.4 to 1.5): 1, and most preferably (0.5 to 1.4): 1, such as 0.6: 1, 0.7: 1, 0.8: 1, 0.9: 1.1.0: 1.1.1: 1.1.2: 1, 1.3: 1, or 1.4: 1. 3. The catalyst component according to claim 1 or 2, wherein the molar ratio of the total amount of compound A and compound B relative to magnesium is (0.03 to 0.17): 1, and preferably (0.04 to 0.14): 1, such as 0.03: 1, 0.04: 1, 0.05: 1, 0.06: 1, 4. The catalyst component according to any of claims 1 to 3, wherein the compound B is at least one member selected from a group consisting of ether compounds, monocarboxylic ester compounds, and dicarboxylic ester compounds; preferably, compound B is at least one element chosen from a group consisting of 1,3-diether compounds, polyol (polyphenol) ester compounds, and ester compounds of succinic acid. 5. The catalyst component according to claim 4, in which the compound B is at least one compound as shown in formula (II): O O He h R -C -O - Μ - OCR ₂ in which Ri and R2 are the same or different from each other, chosen from a group consisting of substituted or unsubstituted C1 to C20 alkyl, C2 to C20 alkenyl substituted or unsubstituted, substituted or unsubstituted C3 to C20 cycloalkyl, substituted or unsubstituted Có to C20 aryl, substituted or unsubstituted C7 to C20 alkaryl, substituted or unsubstituted C7 to C20 aralkyl, or polycyclic aromatic groups C10 to C20 substituted or unsubstituted; and Μ is a divalent linking group, preferably chosen from a group consisting of C1 to C20 alkylene, C3 to C20 cycloalkylene, C6 to C20 arylene and one of their combinations, and alkylene, cycloalkylene, and / or arylene is optionally substituted BE2018 / 0128 by C1-C20 alkyl, and the substituent is optionally linked to form a ring or a plurality of rings, and in which a carbon atom and / or a hydrogen atom in Μ is optionally substituted by a d atom 'nitrogen, oxygen, sulfur, silicon, phosphorus or halogen. 6. The catalyst component according to claim 5, in which Μ is a divalent linking group as shown in formula (III), formula (IV), formula (V), formula (VI), or the formula (VII); in formula (III), R'3 to R's are the same or different from each other, chosen from a group consisting of hydrogen, halogen, substituted or unsubstituted C1 to C20 alkyl, substituted or unsubstituted C2 to C20 alkenyl , substituted or unsubstituted C3 to C20 cycloalkyl, substituted or unsubstituted C6 to C20 aryl, substituted or unsubstituted C7 to C20 alkaryl, substituted or unsubstituted C7 to C20 aralkyl, or substituted Cio to C20 polycyclic aromatic groups or unsubstituted, or substituted or unsubstituted C1 to C20 ester, and R'7 and R's are optionally linked to a cycle or a plurality of cycles; in formula (IV), R ¹ to R ⁴ are the same or different from each other, chosen from a group consisting of hydrogen, halogen, substituted or unsubstituted C1 to C20 alkyl, substituted or unsubstituted C2 to C20 alkenyl , substituted or unsubstituted C3 to C20 cycloalkyl, substituted or unsubstituted C6 to C20 aryl, substituted or unsubstituted C7 to C20 alkaryl, substituted or unsubstituted C7 to C20 aralkyl, or substituted Cio to C20 polycyclic aromatic groups or unsubstituted, and R ¹ to R ⁴ are linked to a cycle or a plurality of cycles; and in formula (V), formula (VI), and formula (VII), R3, R4, and R5 are independently selected from a group consisting of hydrogen, halogen, substituted or unsubstituted C1-C20 alkyl, alkenyl substituted or unsubstituted C2 to C20, substituted or unsubstituted C3 to C20 cycloalkyl, substituted or unsubstituted C6 to C20 aryl, substituted or unsubstituted C7 to C20 alkaryl, substituted or unsubstituted C7 to C20 aralkyl, or substituted or unsubstituted C10 to C20 polycyclic aromatic groups. BE2018 / 0128 7. The catalyst component according to any of claims 1 to 6, wherein in the catalyst component, a magnesium content measured by the magnesium element is 10 to 25% by weight; a titanium content measured by the titanium element is from 1 to 7% by weight; a content of compound A is from 1 to 20% by weight; and a content of compound B is from 1 to 20% by weight. 8. The catalyst component according to any one of claims 1 to 7, wherein the catalyst component is prepared by a process comprising the following steps: 9. The catalyst component according to claim 8, wherein the magnesium compound is selected from a group consisting of a magnesium dihalide, an alkoxy magnesium, an alkyl magnesium, a hydrate or an alcohol adduct of magnesium dihalide, or a derivative formed by replacing a halogen atom of the magnesium dihalide with an alkoxy or haloalkoxy; and preferably, the magnesium compound is selected from a group consisting of a magnesium dihalide or an alcohol adduct of magnesium dihalide; the titanium compound corresponds to a formula TiX _m (0R ') 4-m, in which R' is C1 to C20 hydrocarbyl, X is halogen, and 1 <m <4, and in which the titanium compound is preferably selected from a group consisting of titanium tetrachloride, titanium tetrabromide, titanium tetraiodide, titanium tetrabutoxylate, titanium tetraethoxylate, titanium monochlorotriethoxylate, titanium dichlorodiethoxylate, or titanium trichloromonoethoxylate more preferably titanium tetrachloride; and the precipitation agent is chosen from a metal halide, preferably a titanium halide, and more preferably titanium tetrachloride. 10. A catalyst for the polymerization of olefins, comprising a reaction product BE2018 / 0128 of the following components: at. the catalyst component according to any of claims 1 to 9; b. an aluminum alkyl compound, which is preferably an aluminum aluminum compound represented by the formula AlR ” _n X3-n, wherein R” is hydrogen or C1-C20 hydrocarbyl, X is halogen, and 0 <n <3; and vs. optionally, an external electron donor component, which is preferably an organosilicon compound represented by the formula (R ⁵ ) kSi (OR ⁶ ) 4-k, in which 0 <k <3; R ⁵ is selected from a group consisting of halogen, hydrogen, unsubstituted C1 to C20 alkyl or C1 to C20 haloalkyl, substituted or unsubstituted C3 to C20 cycloalkyl, substituted or unsubstituted C1 to C20 aryl or amino; and R ⁶ is C1-C20 alkyl or unsubstituted C1-C20 haloalkyl, substituted or unsubstituted C3-C20 cycloalkyl, substituted or unsubstituted C1-C20 aryl or amino. 11. The catalyst according to claim 10, wherein a molar ratio of component a and component b measured by titanium on aluminum is in a range of 1: (5 to 1000), preferably 1: (25 to 100); and a molar ratio of component c and component a measured by Γ external electron donor on titanium is in the range of (0 to 500): 1, preferably (25 to 100): 1. 12. A prepolymerization catalyst for the polymerization of olefins, comprising a prepolymer obtained by a prepolymerization of the catalyst component according to any one of claims 1 to 9 and / or the catalyst according to claim 10 or 11 with an olefin, and a multiple of the pre-polymerization is in the range of 0.1 to 1000 g of olefin prepolymer / g of catalyst component. 13. A process for the polymerization of olefins, comprising carrying out a polymerization of olefins in the presence of at least one chosen from the catalyst component according to any one of claims 1 to 9, the catalyst according to claim 10 or 11, and the prepolymerization catalyst according to claim 12, preferably the olefin is represented by the formula CH2 = CHR '”, in which R'” is hydrogen, C1 to C12 substituted or unsubstituted alkyl or substituted or unsubstituted C6 to C12 aryl, and more preferably the olefin is ethylene or propylene.