NL2021838A - Catalyst component, catalyst, and prepolymerization catalyst for olefin polymerization, and method for olefin polymerization - Google Patents

Abstract

Provided are a catalyst component for olefin polymerization, a catalyst for olefin polymerization, a prepolymerization catalyst obtained by prepolymerization of the catalyst, and a method for olefin polymerization. The catalyst component for olefin polymerization includes magnesium, titanium, halogen, Lewis base compound A as shown in formula (I), and another Lewis base compound B, wherein a molar ratio of a total amount of compound A and compound B to magnesium is in a range of (0.03—O.20):1. When the catalyst is used in olefin polymerization, in particular propylene polymerization, the catalyst has a high activity.

Description

Patent Center © 2021838

(21) Application number: 2021838 © Application submitted: October 19, 2018 (51) Int. CL:

C08F 4/649 (2018.01)

© Priority: © Applicant (s): October 19, 2017 CN 201710996877.4 China Petroleum & Chemical Corporation in Beijing, China, CN. Beijing Research Institute of Chemical Application registered: Industry, China Petroleum & Chemical April 24, 2019 Corporation in Beijing, China, CN. © Request published: April 25, 2019 © Inventor (s): Mingzhi Gao in Beijing (CN). Xiaoxia Cai in Beijing (CN). Haitao Liu in Beijing (CN). Jianhua Chen in Beijing (CN). Jixing Mate Beijing (CN). Jun Wang in Beijing (CN). Changxiu Li in Beijing (CN). Jianjun Hu in Beijing (CN). Jing Mate Beijing (CN). © Authorized representative: mr.ir. F.N. Ferro in AMSTERDAM.

(54) CATALYST COMPONENT, CATALYST, AND PREPOLYMERIZATION CATALYST FOR OLEFIN POLYMERIZATION, AND METHOD FOR OLEFIN POLYMERIZATION © Provided are a catalyst component for olefin polymerization, a catalyst for olefin polymerization, a prepolymerization catalyst obtained by prepolymerization of the catalyst, and a method for olefin polymerization. The catalyst component for olefin polymerization includes magnesium, titanium, halogen, Lewis base compound A as shown in formula (I), and another Lewis base compound B, a molar ratio or a total amount of compound A and compound B to magnesium is in a range or (0.03-0.20): 1. When the catalyst is used in olefin polymerization, in particular propylene polymerization, the catalyst has a high activity.

NL A 2021838

This publication corresponds to the documents originally submitted.

-1 CATALYST COMPONENT, CATALYST, AND PREPOLYMERIZATION CATALYST FOR OLEFIN POLYMERIZATION, AND METHOD FOR OLEFIN POLYMERIZATION

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Chinese patent application CN 201610846996.7, entitled Catalyst component, catalyst, and prepolymerization catalyst for olefin polymerization, and method for olefin polymerization and filed on October 19, 2017, the whole of which is included by reference.

FIELD OF THE DISCLOSURE

The present disclosure relates to the technical field of olefin polymerization, and in particular, to a catalyst component for olefin polymerization, a catalyst for olefin polymerization, a prepolymerization catalyst obtained by prepolymerization of the catalyst, and a method for olefin polymerization.

BACKGROUND OF THE DISCLOSURE

A Ziegler-Natter catalyst is generally composed of magnesium, titanium, halogen, and a Lewis base and so on. The Lewis base is an organic compound containing oxygen, nitrogen, phosphorus, silicon, and the like. Sometimes, in order to improve overall performance of a catalyst, two or more Lewis base compounds are added during preparation of the catalyst. For example, it is disclosed in Chinese patents 201310517877.3, 201310518069.9, 201310518086.2, and 201310518285.3 that overall performance of a catalyst can be improved by using malonate compounds together with other Lewis base compounds, but activity of the catalyst is not high enough, which is not beneficial for energy-saving and efficiency-increasing. It is disclosed in Chinese patents CN201510708748.1 and CN201510708579.1 that phthalic anhydride has been introduced into the above system, and activity of a catalyst is improved. However, introduction of phthalic anhydride will result in a final catalyst obtained includes more or less a phthalate compound, and residue of the phthalic compound will eventually stay in a polymer. The phthalate compound is an environmental hormone, which will influence human health, such as fertility and development, and thus it is not desirable that the polymer comprises such a substance.

Although research and development on the Ziegler-Natter catalyst have been carried out for

-1-2decades, how to further improve the function of the catalyst is still a pursuit in the field, especially how to achieve a balance among various properties of the catalyst. For example, how to avoid the presence of a phthalate compound in the catalyst while maintaining high catalytic activity is pursued.

SUMMARY OF THE DISCLOSURE

The present disclosure aims to provide a catalyst component, a catalyst, and a prepolymerization catalyst for olefin polymerization, and a method for olefin polymerization. When used for olefin polymerization, especially for propylene polymerization, the catalyst component or the catalyst provided has a high catalytic activity, and does not include a phthalate compound.

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

COOR _a

COOR _b in formula (I), R _a and R _b may be identical to different from each other, selected from substituted or unsubstituted C 1 -C ₂₀ alkyl, substituted or unsubstituted C ₂ -C ₂₀ alkenyl, substituted or unsubstituted C ₃ - C ₂₀ cycloalkyl, substituted- or unsubstituted C ₅ -C ₂₀ aryl, substituted- or unsubstituted C 7 -C 20 alkaryl, substituted- or unsubstituted C ₇ -C ₂₀ aralkyl or substituted- or unsubstituted C ₀ -C ₂₀ polycyclic aromatic groups, preferably selected from substituted- or unsubstituted linear or branched C1-C10 alkyl, substituted- or unsubstituted C ₅ -C ₈ cycloalkyl, substituted- or unsubstituted C ₆ -C ₀ aryl, substituted- or unsubstituted C 7 -C 10 alkaryl, or substituted- or unsubstituted C ₇ -C ₀ aralkyl, and Further preferably selected from substituted or unsubstituted linear or branched C ₂ -C ₆ alkyl; R _c and R _d May be identical to or different from each other, selected from hydrogen, substituted- or unsubstituted linear or branched Ci-C ₂₀ alkyl, substituted- or unsubstituted C ₂ -C ₂₀ alkenyl, substituted- or unsubstituted C ₃ -C ₂₀ cycloalkyl , substituted or unsubstituted C ₆ -C ₂₀ aryl, substituted or unsubstituted C ₇ -C ₂₀ alkaryl,

-2-3substituted or unsubstituted C ₇ -C ₂₀ aralkyl or substituted or unsubstituted C ₁ -C ₂₀ polycyclic aromatic groups, preferably selected from substituted or unsubstituted linear or branched C 1 -C ₁₀ alkyl, substituted or unsubstituted C ₂ -C ₁₀ alkenyl, substituted or unsubstituted C5 -C10 cycloalkyl, substituted or unsubstituted C ₆ -Ci ₀ aryl, substituted or unsubstituted C ₇ -Ci ₀ alkaryl, substituted or unsubstituted C ₇ -Cio aralkyl or substituted or unsubstituted C ₁₀ -Ci ₅ polycyclic aromatic groups, further preferably selected from substituted- or unsubstituted linear or branched C ₂ -C ₆ alkyl, substituted- or unsubstituted C ₃ -C ₆ alkenyl, substituted- or unsubstituted C ₆ -C _g aryl or substituted- or unsubstituted C ₇ -Cioaralkyl, and most preferably linear or branched C ₂ -C ₆ alkyl or C ₃ -C ₆ alkenyl; and R _c and R _d May optionally be bonded together to form a ring.

After an entensive study, inventors of the present invention found that when the molar ratio of a total amount of compound A and compound B to magnesium in the catalyst component is controlled in a range or (0.03-0.20): 1, preferably in a range or (0.03-0.17): 1, and more preferably in a range or (0.04-0.14): 1, the catalytic activity which can be significantly improved. According to some, the molar ratio of a total amount of compound A and compound B to magnesium may be 0.03: 1, 0.04: 1, 0.05: 1, 0.06: 1, 0.07: 1, 0.08: 1, 0.09: 1, 0.10: 1, 0.11: 1, 0.12: 1, 0.13: 1, 0.14: 1, 0.15: 1, 0.16: 1, 0.17: 1, 0.18: 1, 0.19: 1, or 0.20: 1 and so on.

Further, the inventors found that when a molar ratio or compound A to compound B is controlled in a specific range, the catalytic activity that can be significantly improved. According to a preferred embodiment of the present disclosure, in the catalyst component, the molar ratio or compound A to compound B is in a range of (0.21-2.0): 1, preferably (0.3-1.6): 1, further preferably (0.4 -1.5): 1, and most preferably (0.5-1.4): 1. According to some, the molar ratio of compound A to compound B may 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 C 1 -C ₂₀ alkyl refers to linear alkyl or C 1 -C ₂₀ or branched alkyl or C ₃ -C ₂₀ , and includes, but 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 C ₃ -C ₂₀ cycloalkyl include, but not limited to, cyclopropyl, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, 4-ethylcyclohexyl, 4-n-propylcyclohexyl and 4-n-butyl cyclohexyl.

In the present disclosure, examples of C ₆ -C ₂₀ aryl include, but not limited to, phenyl,

-3-4-methylphenyl, 4-ethylphenyl, dimethylphenyl, vinylphenyl.

In the present disclosure, the term C ₂ -C ₂₀ alkenyl refers to linear alkenyl or C 1 -C ₂₀ or branched alkenyl or C ₃ -C ₂₀ , and includes, but not limited to, vinyl, allyl, and butenyl.

In the present disclosure, examples of C ₇ -C ₂₀ aralkyl include, but not limited to, phenylmethyl, phenylethyl, phenyl-n-propyl, phenylisopropyl, phenyl-n-butyl and phenyl-tert-butyl.

In the present disclosure, examples of C ₇ -C ₂₀ alkaryl include, but not limited to, tolyl, ethylphenyl, n-propylphenyl, isopropylphenyl, n-butylphenyl and tert-butylphenyl.

In the present disclosure, examples of C ₁₀ -C ₂₀ polycyclic aromatic groups include, but not limited to, naphthyl, anthracenyl, phenanthryl, fluorenyl.

Specifically, the compound as shown in formula (I) is preferably selected from a group consisting of diethyl dipropyl malonate, dipropyl dipropyl malonate, diethyl diisobutyl malonate, diethyl

di-n-butyl malonate, diethyl di-tert-butyl malonate, diethyl dibenzyl malonate, diethyl phenylethyl malonate, dipropyl diisobutyl malonate, dipropyl di-n-butyl malonate, dipropyl di-tert-butyl malonate, dibutyl diisobutyl malonate, dibutyl di-n-butyl malonate, dibutyl di-tert-butyl malonate, dipentyl diisobutyl malonate, dipentyl di-n-butyl malonate, dipentyl di-tert-butyl malonate, di hexyl diisobutyl malonate, dihexyl di-n-butyl malonate, dihexyl di-tert-butyl malonate, diheptyl diisobutyl malonate, diheptyl di-n-butyl malonate, diheptyl di-tert-butyl malonate, dipropyl diisoamyl malonate, dipropyl di-n-pentyl malonate, dipropyl

dihexylmalonate, dipropyl phenylethylmalonate, dipropyl phenylmethylmalonate, dipropyl phenylpropylmalonate, dipropyl phenyl-n-butylmalonate, dipropyl phenylisobutylmalonate, dipropyl phenylisopentylmalonate, dipropyl phenyl-n-pentylmalonate, dipropyl diphenylmalonate, dipropyl benzylethylmalonate, dipropyl benzylmethylmalonate, dipropyl benzylpropylmalonate, dipropyl benzyl-n-butylmalonate, dipropyl benzylisobutylmalonate, dipropyl benzylisopentylmalonate, dipropyl benzyl-n-pentylmalonate, dipropyl dibenzylmalonate, dibutyl phenylethylmalonate, dibutyl phenylmethylmalonate, dibutyl phenylpropylmalonate, dibutyl phenyl-n-butylmalonate, dibutyl phenylisobutylmalonate, dibutyl phenylisopentylmalonate, dibutyl phenyl-n-pentylmalonate, dibutyl diphenylmalonate, dibutyl benzylethylmalonate , dibutyl benzyl methyl malonate, dibutyl benzyl propyl malonate, dibutyl benzyl n-butyl malonate, dibutyl benzyl isobutyl malonate, dibutyl benzyl isopentyl malonate, dibutyl benzyl-n-pentyl malonate, dibutyl diben zylmalonate, dipentyl phenylethylmalonate, dipentyl phenylmethylmalonate, dipentyl phenylpropylmalonate, dipentyl

-4-5phenyl-n-butylmalonate, dipentyl phenylisobutylmalonate, dipentyl phenylisopentylmalonate, dipentyl phenyl-n-pentylmalonate, dipentyl diphenylmalonate, dipentyl benzylethylmalonate, dipentyl benzylmethyl malylateyl diponyl malylateyl diphenyl malylateyl diphenyl malylateyl diphenyl malylate n-pentylmalonate, dipentyl dibenzylmalonate, dicyclohexyl phenylethylmalonate, dicyclohexyl phenylmethylmalonate, dicyclohexyl phenylpropylmalonate, dicyclohexyl phenyl-n-butylmalonate, dicyclohexyl phenylisobutylmalonate, dicyclohexyl phenylisopentylmalonate, dicyclohexyl phenyl-n-pentyl malonate, dicyclohexyl diphenylmalonate, dicyclohexyl benzylethylmalonate, dicyclohexyl benzylmethylmalonate, dicyclohexyl benzylpropylmalonate, dicyclohexyl benzyl n-butyl malonate, dicyclohexyl benzyl isobutyl malonate, dicyclohexyl benzyl isopentyl malonate, dicyclohexyl benzyl n-pentyl malonate, dicyclohexyl dibenzyl malonate, diphenyl phenylmethy lmalonate, phenylpropylmalonate diphenyl, diphenyl phenyln-butylmalonate, diphenyl phenylisobutylmalonate, phenylisopentylmalonate diphenyl, diphenyl phenyln-pentylmalonate, diphenyl diphenylmalonate, benzylethylmalonate diphenyl, diphenyl benzylmethylmalonate, benzylpropylmalonate diphenyl, diphenyl benzyl-n-butylmalonate, diphenyl benzylisobutylmalonate, benzylisopentyl diphenyl malonate, diphenyl benzyl-n-pentylmalonate, diphenyl dibenzylmalonate, dicyclohexyl fluorenylmethylmalonate, dicyclohexyl fluorenylpropylmalonate, dicyclohexyl fluorenyl-n-butylmalonate, dicyclohexyl fluorenylisobutylmalonate, dicyclohexyl fluorenylisopentylmalonate, dicyclohexyl fluorenyl-n-pentylmalonate, dicyclohexyl difluorenyl malonate, diphenyl allylmethylmalonate, diphenyl allyl propylmalonate, diphenyl allyl-n -butyl maleate, diphenyl allyl isobutyl maleate, diphenyl allyl isopentyl maleate, diphenyl allyl-n-pentyl maleate, diphenyl diallyl maleate, dimethyl allyl methyl maleate, dimethyl allyl propyl maleate , dimethyl allyl-n-butyl malonate, dimethyl allyl isobutyl malonate, dimethyl allyl isopentyl malonate, dimethyl allyl-n-pentyl malonate, dimethyl diallyl malonate, diethyl allylmethyl malonate, diethyl allylpropyl malonate, diethyl allyyl maliyl, diethyl allyl maliate diethyl diallylmalonate, dipropyl allylmethylmalonate, dipropyl allylpropylmalonate, dipropyl allyl-n-butylmalonate, dipropyl allylisobutylmalonate, dipropyl allylisopentylmalonate, dipropyl allyl-n-pentylmalonate, dipropyl diallylmalonate, dibutyl allylmethylmalonate, dibutyl allylpropylmalonate, dibutyl allyl-n-butylmalonate, dibutyl allylisobutylmalonate, dibutyl allylisopentylmalonate , dibutyl allyl-n-pentylmalonate, dibutyl diallylmalonate, dipentyl allylmethylmalonate, dipentyl allylpropylmalonate, dipentyl allyl-n-butylmalonate, dipentyl allylisobutylmalonate, dipentyl allylisopentyl alonyl-dipentma-dipentma-dipentma-dipentma lonate, dicyclohexyl allyl methyl malonate, dicyclohexyl allyl propyl malonate, dicyclohexyl allyl-n-butyl malonate, dicyclohexyl allylisobutyl malonate, dicyclohexyl allylisopentyl malonate,

-5-6dicyclohexyl allyln-pentyl malonate and dicyclohexyl diallyl malonate, further preferably selected from diethyl diisobutyl malonate, diethyl di-n-butyl malonate, diethyl di-tert-butyl malonate, dipropyl diisobutyl malonate, dipropyl di-n-butropate malodate , diethyl dibenzyl malonate, dipropyl dibenzyl malonate, diethyl phenylethyl malonate, dipropyl phenylethyl malonate, diethyl dipropyl malonate, dipropyl dipropyl malonate, diethyl diallylmalonate anddipropyl diallylmalonate.

According to the present disclosure, the another Lewis base compound B refers to another Lewis base different from compound A.

According to an 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 1,3-diether compound, a polyol (polyphenol) ester compound, and a succinic acid ester compound.

Further preferably, compound B is at least one compound as shown in formula (II),

Θ θ

Il II

RC-0 - M - OCR _{2 (| 1)} where R 1 and R ₂ are identical to or different from each other, selected from substituted or unsubstituted C 1 -C ₂₀ alkyl, substituted or unsubstituted C ₂ -C ₂₀ alkenyl, substituted or unsubstituted C ₃ -C ₂₀ cycloalkyl, substituted or unsubstituted C ₆ -C ₂₀ aryl, substituted or unsubstituted C ₇ -C ₂₀ alkaryl, substituted or unsubstituted C ₇ -C ₂₀ aralkyl or substituted or unsubstituted C ₀ -C ₂₀ polycyclic aromatic groups ; and M is a divalent linking group, preferably selected from a group consisting of C 1 -C ₂₀ alkylene, C ₃ -C ₂₀ cycloalkylene, C ₆ -C ₂₀ arylene and a combination thereof. The alkylene, cycloalkylene, and / or arylene is optionally substituted with C 1 -C ₂₀ alkyl, and the substituent is optionally bonded to a ring or a plurality of rings. A carbon atom or / and a hydrogen atom in M is optionally substituted with nitrogen, oxygen, sulfur, silicon, phosphorus or a halogen atom.

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

-7 Formula (ΠΣ) Formula (IV) Formula (V) Formula (VI) Formula (VII).

In formula (Π), R _'3 -R' _g are identical to or different from each other, selected from hydrogen, halogen, substituted- or unsubstituted Ci-C ₂₀ alkyl, substituted- or unsubstituted C ₂ -C ₂₀ alkenyl, substituted- or unsubstituted C ₃ -C ₂₀ cycloalkyl, substituted- or unsubstituted C ₆ -C ₂₀ aryl, substituted- or unsubstituted C ₇ -C ₂₀ alkaryl, substituted- or unsubstituted C ₇ -C ₂₀ aralkyl, substituted- or unsubstituted Cio-C _{2 O} polycyclic aromatic groups, or substituted- or unsubstituted Ci-C ₂₀ ester, and R _'7 and R' _g are optionally bonded to form a ring or rings or a Plurality.

In formula (IV), R ⁴ -R ⁴ are identical to or different from each other, selected from substituted or unsubstituted C 1 -C ₂₀ alkyl, substituted or unsubstituted C ₂ -C ₂₀ alkenyl, substituted or unsubstituted C ₃ -C ₂₀ cycloalkyl , substituted or unsubstituted C ₆ -C ₂₀ aryl, substituted or unsubstituted C ₇ -C ₂₀ alkaryl, substituted or unsubstituted C ₇ -C ₂₀ aralkyl, or substituted or unsubstituted C ₀ -C ₂₀ polycyclic aromatic groups, and R ⁴ -R ⁴ are bound to one ring or a variety of rings.

In formula (V), formula (VI), and formula (VII), R _3, R _4, and R _s are independently selected from hydrogen, halogen, substituted- or unsubstituted Ci-C ₂₀ alkyl, substituted- or unsubstituted C ₂ -C ₂₀ alkenyl, substituted or unsubstituted C ₃ -C ₂₀ cycloalkyl, substituted or unsubstituted C ₆ -C ₂₀ aryl, substituted or unsubstituted C ₇ -C ₂₀ alkaryl, substituted or unsubstituted C ₇ -C ₂₀ aralkyl, substituted or unsubstituted C ₀ - C ₂₀ polycyclic aromatic groups.

In the present disclsure, the term substituted- or unsubstituted Means a hydrogen atom-which is bonded to a carbon of the group described can be substituted- by a group-which is selected from a group Consisting of Ci-Cio alkyl, C ₂ -C ₀ alkenyl, C ₂ -C ₂₀ alkynyl, halogen, nitro group, cyano group, amino-C ₀ -C 10 alkyl and other common substitute groups.

Specifically, the compound as shown in formula (II) is preferably selected from a group consisting of 2,4-pentanediol dibenzoate, 2,4-pentanediol di-n-propyl dibenzoate, 3,5-heptanediol dibenzoate,

3,5-heptanediol di-n-propyl dibenzoate, 4-ethyl-3,5 heptanediol dibenzoate, 3,5-heptanediol di-p-methyl benzoate, 3,5-heptanediol di-o-methyl benzoate, 3,5- heptanediol di-p-chloro benzoate,

3,5-heptanediol di-o-chloro benzoate, 3,5-heptanediol di-p-methoxyl benzoate, 3,5-heptanediol di-o-methoxyl benzoate, 3,5-heptanediol di-m-methoxyl benzoate, 2- methyl 3,5-heptanediol dibenzoate, 4-methyl-3,5-heptanediol dibenzoate, 6-methyl-3,5-heptanediol dibenzoate, 4-ethyl-3,5-heptanediol dibenzoate, 5-ethyl-3,5- heptanediol dibenzoate, 4-propyl-3,5-heptanediol

-7-8-dibenzoate, 4-butyl-3,5-heptanediol dibenzoate,

2,4-dimethyl-3,5-heptanediol dibenzoate,

2,6-dimethyl-3,5-heptanediol

6,6-dimethyl-3,5-heptanediol

4,4-dimethyl-3,5-heptanediol dibenzoate, 4,4-dimethyl-3,5-heptanediol dibenzoate, 4,6-dimethyl-3,5-heptanediol dibenzoate, 6,6-dimethyl-3,5-heptanediol

2-methyl-4-ethyl-3,5-heptanediol dibenzoate,

4-methyl-4-ethyl-3,5-heptanediol

2-methyl-4-propyl-3,5-heptanediol dibenzoate,

4-methyl-4-propyl-3,5-heptanediol dibenzoate, dibenzoate, dibenzoate, dibenzoate, dibenzoate,

6-methyl-2,4-heptanediol di- (p-chlorobenzoic acid) ester,

6-methyl-2,4-heptanediol di- (p-methylbenzoic acid Jester,

6-methyl-2,4-heptanediol di (m-methylbenzoic acid) ester,

2,2,6,6-tetramethyl-3,5-heptanediol dibenzoate, 4-methyl-3,5-octanediol dibenzoate,

4-ethyl-3,5-octanediol dibenzoate,

4-propyl-3,5-octanediol dibenzoate, 4-butyl-3,5-octanediol dibenzoate, 4,4-dimethyl-3,5-octanediol dibenzoate, 4-methyl-4-ethyl-3,5-octanediol dibenzoate,

2-methyl-4-ethyl-3,5-octanediol dibenzoate, 2-methyl-6-ethyl-3,5-octanediol dibenzoate, 5-methyl-4,6 nonanediol dibenzoate, 5-ethyl-4,6 nonanediol dibenzoate, 5-propyl-4,6 nonanediol dibenzoate, 5-butyl-4,6 nonanediol dibenzoate, 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, 1,2-naphthalene dibenzoate, 2,3-naphthalene dibenzoate, dibenzoic acid-1,8-naphthylate, di -4-methyl benzoic 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 1,8-naphthylate, di-4-isopropyl benzoic acid 1,8-naphthylate, di-4-n-butyl benzoic 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, di-4-fluorobenzoic acid-1,8-naphthylate, 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 content or magnesium measuring by magnesium element is 10-25wt%; a content or titanium measuring by titanium element is 1-7%; a content or compound A is 1-20 wt%; and a content of compound B is 1-20 wt%.

According to a preferred embodiment of the present disclosure, when compound A is di-n-butyl diethyl malonate, and compound B is 2,4-pentanediol di-n-propyl benzoate, the molar ratio or compound A to compound B is (0.6 -1.0): 1, and the molar ratio of a total amount of compound A and

-8-9compound B to magnesium is (0.1-0.14): 1, the obtained catalyst has an extremely high catalytic activity.

The catalyst component in the present disclosure can be prepared by a method including following steps of contacting a magnesium compound, a titanium compound, the compound as shown in formula (I), and the compound as shown in formula (II) 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 method including following steps.

1) A magnesium compound is dissolved into a system including compound A, and a precipitation agent is added so as to precipitate solids.

2) The solids precipitated in step 1) are treated with a titanium compound, and compound B has been added therein and / or before a process of treating the solids with the titanium compound.

In step 1), A magnesium compound being dissolved into a system containing compound A comprising two circumstances: a magnesium compound being first dissolved into a solvent system to obtain a solution, and then compound A was added; and a magnesium compound is dissolved into a system made up of compound A and a solvent system together.

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

In the present disclosure, the titanium compound may be a titanium compound represented by formula TiX _m (OR ') 4 _m . In the formula, R 'is C 1 -C ₂₀ hydrocarbyl, X is halogen, and 1 <m <4. The titanium compound is preferably selected from a group consisting of titanium tetrachloride, titanium tetrabromide, titanium tetraiodide, titanium tetra butoxy Iate, titanium tetraethoxylate, titanium monochlorotriethoxylate, titanium dichlorodiethoxylate, or titanium trichloromonoethoxylate, and is further preferably titanium tetrachloride.

-9-10 In the present disclosure, the precipitation agent may be selected 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 precipitation agent is a titanium tetrachloride.

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

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

The organic epoxide compound, the organic phosphorus compound, and the coprecipitation agent are disclosed in Chinese Patent CN85100997, and relevant content is hereby cited for reference.

Specifically, the magnesium compound can be dissolved in a solvent system consisting of the organic epoxide compound and the organic phosphorus compound. The organic epoxide compound comprises at least one of aliphatic olefin with 2 to 8 carbon atoms, dialkene, halogenated aliphatic olefin, oxide or dialkene, glycidyl ethers and inner ethers. Specific compounds are as follows: ethylene oxide, propylene oxide, butylene oxide, butadiene oxide, butadiene dioxide, epoxy chloropropane, methyl glycidyl ether, diglycidyl ether, and terahydrofuran.

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

-10-11 In a specific embodiment, the solid catalyst component or the present disclosure is prepared according to a method disclosed in patent CN85100997. First, a magnesium compound is dissolved into a solvent system consisting of an organic epoxide 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 coprecipitation agent having a special structure, i.e., in the presence of compound A as shown in formula (I). At a temperature in a range or -40-50 ° C, at a best in a range or -35-0 ° C, the titanium compound is dripped into the above magnesium halide solution. Then, temperature of reaction mixture is increased to a range or 60-80 ° C, and an electron donor compound is added therein. A suspension liquid is stirred for 0-3 hours at this temperature, and then mother liquor is filtered off. After washing with an inert diluent, a solid is obtained. Then, treating with a mixture of a titanium halide and an inert diluent at a temperature in a range of 60-130 ° C is performed for 1 to 5 times. A solid obtained is washed with an inert diluent, and a solid catalyst is obtained after drying is performed. Measuring by magnesium per mole, a dosage of the organic epoxide compound is in a range or 0.2-10 mol; a dosage of the organic phosphorus compound is in a range or 0.1-3 mol; the compound as shown in formula (I) is in a range or 0.001-30 mol, preferably in a range or 0.05-15 mol; a dosage of the titanium compound is in a range or 3-40 moles, preferably in a range or 5-30 moles; and a dosage of the electron donor compound is in a range or 0.005-15 mol, preferably in a range or 0.05-5 mol.

According to a second aspect of the present disclosure, provided is a catalyst for olefin polymerization, including a reaction product or the following components.

the above catalyst component;

b. an alkyl aluminum compound, preferably an alkyl aluminum compound-which is represented by formula AIRr> X ₃ .n, Wherein R is hydrogen or hydrocarbyl, or Ci-C _20; X is halogen; and 0 <n <3, the alkylaluminum compound can be specifically selected from a group consisting of triethylaluminum, tripropylaluminum, tri-n-butylaluminum, triisobutylaluminum, tri-n-octylaluminum, diethylaluminum hydride, diisobutylaluminum hydride, diethylaluminum chloride, diishutylqualuminum, quanumutylquuminum aluminum chloride, ethyl aluminum dichloride, and is preferably selected from triethyl aluminum and triisobutyl aluminum;

-11-12-

c. optionally, an external electron donor component, which is preferably an organosilicon compound represented by formula (R ⁵ ) kSi (OR ⁶ ) 4. | <. In the formula, 0 <k <3; R ⁵ is selected from halogen, hydrogen atom, linear or branched alkyl or haloalkyl, C 3 -C 20 cycloalkyl, C 6 -C 20 aryl or amino; and R ⁶ is linear or branched alkyl or haloalkyl, C 3 -C ₂₀ cycloalkyl, C ₆ -C ₂₀ aryl or amino.

The expression of optionally, an external electron donor component means that the external electron donor component can be selected or not as required. When an olefin polymer with high stereoregularity is needed, it is required to add the external electron donor. Specifically, the organosilicon compound includes, but not limited to, trimethylmethoxysilicane, trimethylethyoxylsilicane, dimethyldimethoxysilicane, dimethyldiethyoxylsilicane, dimethoxysilicane diphenyl, diphenyl diethyoxylsilicane, triethyoxylsilicane phenyl, phenyl trimethoxysilicane, and vinyltrimethoxysilicane, cyclohexylmethyldimethoxysilicane and methyl tert-butyldimethoxysilicane, preferably selected from cyclohexylmethyldimethoxysilicane and diphenyl dimethoxysilicane.

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

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

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

-12-13 Accepting a fourth aspect of the present disclosure, provided is a method for olefin polymerization, performed in the presence or at least one of the above catalyst component, the above catalyst, and the above prepolymerization catalyst. Preferably, olefin is represented by formula CH ₂ = CHR '. In the formula, R 1 is hydrogen, C 1 -C 12 alkyl or C ₆ -C ₁₂ aryl. The olefin includes, but not limited to, ethylene, propylene, 1-butylene, 4-methyl-1-amylene, and 1-hexene, and more preferably olefin is ethylene or propylene. The method for olefin polymerization is especially suitable for homopolymerization or propylene or for copolymerization or propylene and other olefin.

The catalyst of the present disclosure can be directly added into a reactor to be used in a polymerization process; or the catalyst can be subjected to prepolymerization so as to obtain a prepolymerization catalyst, in the presence of which subsequent polymerization or olefin can be performed.

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

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

Other features and advantages of the present disclosure will be further explained in the subsequent detailed description of the various.

-13-14 DETAILED DESCRIPTION OF THE EMBODIMENTS

Preferred else will be explained in details in the following description. Although preferred expiry of the present disclosure is described in the following description, it should be understood that the present disclosure can be implemented in various manners and should not be limited to elaborated.

Measuring Method

Measurement of xylene soluble substance (XS): Xylene soluble substance is measured according to GB / T24282-2009 standard.

Measurement of a content or Lewis base compounds (including compound A and compound B) is as follows. A content of Lewis base compounds in the catalyst is measured by using a water 600E high performance liquid chromatograph. First, a pretreatment is performed using an ethyl acetate - dilute hydrochloric acid solution system so as to extract the Lewis base compounds. 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. Calculation is performed so as to obtain a percentage of content of the Lewis base compounds in the sample.

Propylene Polymerization

32.5 mmol or AIEt ₃ and 0.01 mmol or methyl cyclohexyl dimethoxy silicane (CHMMS) were placed in a stainless reactor having a volume of 5 L and replaced with a propylene gas, and then 10 mg of a solid catalyst component prepared according to the following examples and comparative examples and 1.2 L or hydrogen gas were added. Into the resulting mixture was introduced 2.3 L of liquid propylene. The resulting mixture was heated to 70 ° C and maintained at 70 ° C for 1 hour. Then, cooling and pressure releasing were performed, so that a PP powder could be obtained. See Table 1 for specific data.

Examples 1-10 and Comparative Examples 1-4

Preparation of Catalyst Component

5.0 g or magnesium chloride, 98 mL or methylbenzene, 4.2 mL or epoxy chloropropane, and 13.0

-14-15mL of tributyl phosphate (TBP) were placed in a reactor with sufficient high-purity nitrogen. Under stirring, the resulting mixture was heated to 50 ° C and kept at this temperature for 2.5 hours. After a complete dissolution of the solid, a certain amount of compound A was added to the obtained solution. The solution was kept for 1 hour. Then, the solution was cooled to a temperature below -25 ° C. 47 mL of TiCl ₄ was added dropwise to the solution within 1 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 obtained mixture was kept for 1 hour at 80 ° C. Then, the resulting mixture was filtered, and after that the obtained mixture was washed twice using 70 mL of methylbenzene or solid precipitate. A solution of 40 mL of TiCl _{4/10-methylbenzene} 60mL was added to the solid obtained precipitate.The mixture was heated to 110 ° C, maintained for 1 hour, and filtered; and same operations were repeated for three times. Then the obtained mixture was washed twice with hexane at 70 ° C, and washed twice with hexane at room temperature, respectively, so as to obtain a (solid) catalyst component. See Table 1 for specific components and dosage or compound A and compound B.

Table 1

Number Compound A Compound B Activity KgPP / gcat / hr XS % A / B mol / mol (A + B) / Mg mol / mol Example 1 diethyl di-n-butyl malonate 2,4-pentanediol di-n-propyl benzoate 92.3 1.5 0.8 0.13 Example 2 diethyl di-n-butyl malonate 2,4-pentanediol dibenzoate 80.3 2.3 0.5 0.08 Example3 diethyl di-n-butyl malonate 3,5-heptanediol dibenzoate 74.7 2.5 1.4 0.20 Example4 diethyl diallyl malonate 3,5-heptanediol dibenzoate 79.0 1.9 0.9 0.14 Example5 diethyl diisobutyl 3,5-heptanediol 73.4 2.5 1.0 0.09

-15-16-

malonate dibenzoate Example6 diethyl di-n-butyl malonate 3,5-heptanediol dibenzoate 69.6 2.8 0.4 0.05 Example7 diethyl diisobutyl malonate 3,5-heptanediol dibenzoate 70.5 2.9 1.0 0.05 Example 8 diethyl diisobutyl malonate 3,5-heptanediol dibenzoate 68.7 2.3 1.0 0.14 Example 9 diethyl diisobutyl malonate 3,5-heptanediol dibenzoate 67.8 2.5 0.5 0.09 Example 10 diethyl di-n-butyl malonate 4-ethyl-3,5-heptane diol dibenzoate 65.1 2.7 0.7 0.10 Comparative Example 1 diethyl diisobutyl malonate 3,5-heptanediol dibenzoate 39.2 2.0 1.0 0.28 Comparative Example 2 diethyl diisobutyl malonate 3,5-heptanediol dibenzoate 35.4 3.5 1.0 0.02 Comparative Example 3 diethyl diisobutyl malonate 3,5-heptanediol dibenzoate 53.7 2.7 0.05 0.09 Comparative Example 4 diethyl diisobutyl malonate 3,5-heptanediol dibenzoate 38.2 2.9 0.3 0.015 Comparative Example 5 diethyl diisobutyl malonate 3,5-heptanediol dibenzoate 32.1 2.6 2.3 0.21

In Table 1, A / B represents a molar ratio or compound A to compound B, and (A + B) / Mg

-16-17represents a molar ratio or a total amount of compound A and compound B to magnesium.

It can be seen from data in Table 1 that a catalyst having high activity is obtained by controlling the molar ratio of the total content of the malonate compound and another internal electron donor 5 compound to magnesium in the catalyst component in the specific range, a catalyst having a higher activity can be obtained. Furthermore, by controlling the molar ratio of the malonate compound to the other internal electron donor compound in the catalyst component in the specific range, the activity of the catalyst can be improved as well. In addition, the ploymer obtained by using the catalyst component or the according to catalyst does not contain a phthalate compound.

It should be noted that the above are provided only for illustrating the present disclosure, rather than restricting the present disclosure. Amendments can be made to the present disclosure based on the disclosure of the claims and within the scope and spirit of the present disclosure. While the above descriptions about the present disclosure involve particular methods, 15 materials, and implementing examples, it does not mean that the present disclosure is limited to the presently disclosed examples. On the contrary, the present disclosure can be extended to other methods and applications having the same functions as those of the present disclosure.

-1718

Claims (2)

Conclusions A catalyst component for olefin polymerization comprising magnesium, titanium, halogen, a Lewis base compound A as shown in formula (I) and another Lewis base compound B, wherein a molar ratio of a total amount of compound A and compound B to magnesium in is in the range of (0.03-0.20): 1, COOR _a COOR _b where R _a and R _b , which may be identical to each other or different from each other, are selected from a group consisting of substituted or unsubstituted C ₁ -C ₂₀ alkyl, substituted or unsubstituted C ₂ -C ₂₀ alkenyl, substituted or unsubstituted C ₃ -C ₂₀ cycloalkyl, substituted or unsubstituted C ₆ -C ₂₀ aryl, substituted or unsubstituted C ₇ -C ₂₀ alkaryl, substituted or unsubstituted C ₇ -C ₂₀ aralkyl, or substituted or unsubstituted C ₁₀ -C ₂₀ . polycyclic aromatic groups, preferably selected from a group consisting of substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C ₅ -C _g cycloalkyl, substituted or unsubstituted Ce-Cio aryl, substituted or unsubstituted C ₇ -Cio alkaryl or substituted or unsubstituted C ₇ -C ₀ -a ralkyl, and more preferably selected from a group consisting of substituted or unsubstituted C ₂ -C ₆ -alkyl; R _c and R _d , which may be identical to each other or different from each other, are selected from a group consisting of hydrogen, substituted or unsubstituted C 1 -C ₂₀ alkyl, substituted or unsubstituted C ₂ -C ₂₀ alkenyl, substituted or unsubstituted C ₃ -C ₂₀ cycloalkyl, substituted or unsubstituted C ₆ -C ₂₀ aryl, substituted or unsubstituted C ₇ -C ₂₀ alkaryl, substituted or unsubstituted C ₇ -C ₂₀ aralkyl, or substituted or unsubstituted C ₁₀ -C ₂₀ . polycyclic aromatic groups, preferably selected from a group consisting of substituted or unsubstituted Ci-Ci ₀ alkyl, substituted or unsubstituted C ₂ -C ₀ alkenyl, substituted or unsubstituted C ₅ -C ₀ -cycloalkyl, substituted or unsubstituted Cg-Cio aryl, substituted or unsubstituted C ₇ -C 10 alkaryl, substituted or unsubstituted C ₇ -C ₁₀ aralkyl, or substituted or unsubstituted C ₁₀ -C ₁₅ polycyclic aromatic groups, more preferably selected from a group consisting of substituted or unsubstituted C ₂ -C ₅ alkyl, substituted or unsubstituted C ₃ -C ₆ alkenyl, substituted or unsubstituted C ₆ -C ₈ aryl, or substituted or unsubstituted C ₇ -C ₁₀ alkyl aralkyl; and R _c and R _d may optionally be connected to each other to form a ring. A catalyst component according to claim 1, wherein a molar ratio of compound A to compound B (0.21-2.0): 1, preferably (0.3-1.6): 1, more preferably (0.4 -1.5): 1 and most preferably (0.5-1.4): 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. A catalyst component according to claim 1 or 2, wherein the molar ratio of the total amount of compound A and compound B to magnesium (0.03-0.17): 1 and preferably (0.040.14): 1, such as 0, 03: 1, 0.04: 1, 0.05: 1, 0.06: 1, 0.07: 1, 0.08: 1, 0.09: 1, 0.10: 1, 0.11: 1, 0.12: 1, 0.13: 1, 0.14: 1, 0.15: 1, 0.16: 1, 0.17: 1, 0.18: 1, 0.19: 1 or 0.20: 1. The catalyst component of any one of claims 1 to 3, wherein compound B is at least one compound selected from a group consisting of ether compounds, monocarboxylic acid ester compounds and dicarboxylic acid ester compounds; wherein preferably compound B is at least one compound selected from a group consisting of 1,3-dieteric compounds, polyol (polyphenol) ester compounds, and succinic ester compounds. The catalyst component of claim 4, wherein compound B is at least one compound as shown in formula (II): O o R ₁ -C 0 M - OCR _{2 (| i)} , wherein R 1 and R ₂ , which are identical to each other or different from each other, are selected from a group consisting of substituted or unsubstituted C 1 -C ₂₀ alkyl, substituted or unsubstituted C ₂ -C ₂₀ alkenyl, substituted or unsubstituted C ₃ -C ₂₀ cycloalkyl, substituted or unsubstituted C ₆ -C ₂₀ aryl, substituted or unsubstituted C ₇ -C ₂₀ alkaryl, substituted or unsubstituted C ₇ -C ₂₀ aralkyl, or substituted or unsubstituted C ₁₀ -C ₂₀ polycyclic aromatic groups; and M is a divalent linking group, which is preferably selected from a group consisting of C ₁ -C ₂₀ alkylene, C ₃ -C ₂₀ cycloalkylene, C ₆ -C ₂₀ arylene and a combination thereof and the alkylene, cycloalkylene and / or arylene is optionally substituted with C 1 -C ₂₀ alkyl and the substituent is optionally bonded to form one ring or a plurality of rings and wherein a carbon atom and / or a hydrogen atom in M is optionally substituted by nitrogen, oxygen, sulfur, silicon, phosphorus or a halogen atom. The catalyst component of claim 5, wherein M is a divalent linking group as shown in formula (III), formula (IV), formula (V), formula (VI) or formula (VII); (III) (IV) (V) (VI) (VII) in formula (III) R ' ₃ -Rs / which are identical to each other or different from each other, are selected from a group consisting of hydrogen, halogen, substituted or unsubstituted C ₁ -C ₂₀ alkyl, substituted or unsubstituted C ₂ -C ₂₀ alkenyl, substituted or unsubstituted C ₃ -C ₂₀ cycloalkyl, substituted or unsubstituted C ₆ -C ₂ D-aryl, substituted or unsubstituted C ₇ -C ₂₀ alkaryl , substituted or unsubstituted C ₇ -C ₂₀ aralkyl, substituted or unsubstituted C ₁₀ -C ₂₀ polycyclic aromatic groups or substituted or unsubstituted C 1 -C ₂₀ ester and R ₇ and R ₇ optionally on a ring or a plurality of rings are bound; in formula (IV) R 1, R ⁴ , which are identical to each other or different from each other, are selected from a group consisting of hydrogen, halogen, substituted or unsubstituted C 1 -C ₂₀ alkyl, substituted or unsubstituted C ₂ -C ₂₀ - alkenyl, substituted or unsubstituted C ₃ -C ₂₀ cycloalkyl, substituted or unsubstituted C ₆ -C ₂₀ aryl, substituted or unsubstituted C ₇ -C ₂₀ alkaryl, substituted or unsubstituted C ₇ -C ₂₀ aralkyl, or substituted or unsubstituted C ₁₀ -C ₁₈ alkyl ₂₀ .polycyclische aromatic groups, and R ⁴ -R ⁴ are bonded to a single ring or multiple rings; and in formula (V), formula (VI) and formula (VII) R ₃ , R ₄ and R _{5 are} independently selected from a group consisting of hydrogen, halogen, substituted or unsubstituted C 1-6 alkyl, substituted or unsubstituted C ₂ -C ₂₀ -alkenyl, substituted or unsubstituted C ₃ -C ₂₀ cycloalkyl, substituted or unsubstituted C ₆ -C ₂₀ aryl, substituted or unsubstituted C ₇ -C ₂₀ alkaryl, substituted or unsubstituted C ₇ -C ₂₀ aralkyl, or substituted or unsubstituted C 10 -polycyclische -C ₂₀ aromatic groups. A catalyst component according to any of claims 1-6, wherein in the catalyst component a content of magnesium, measured as a magnesium element, is 10-25% by weight; a titanium content, measured aistitane element, is 1-7% by weight; a content of compound A is 1-20% by weight; and a content of compound B is 1-20% by weight. A catalyst component according to any of claims 1-7, wherein the catalyst component is prepared by a process comprising the following steps: 1) dissolving a magnesium compound in a system comprising compound A and adding a precipitant to precipitate solids; and 2) treating the solids precipitated in step 1) with a titanium compound and adding compound B during and / or before a process for treating the solids with the titanium compound. The catalyst component of claim 8, wherein the magnesium compound is selected from a group consisting of magnesium dihalide, alkoxy magnesium, 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 alkoxy or haloalkoxy ; and preferably the magnesium compound is selected from a group consisting of magnesium dihalide or alcohol adduct of magnesium dihalide; the titanium compound has a formula TiX _m (OR ') ₄ . _m , wherein R 1 is C 1 -C 20 -hydrocarbyl, X is halogen and 1 <m <4 and wherein the titanium compound is preferably selected from a group consisting of titanium tetrachloride, titanium tetrabromide, titanium tetraiodide, titanium tetrabutoxylate, titanium tetraethoxylate, titanium monochlorotriethoxiethanoate ethoxiethanoate ethoxiethanoate ethoxiethanoate ethoxiethanoate ethoxate and more preferably titanium tetrachloride; and the precipitating agent is selected from metal halide, preferably titanium halide and more preferably titanium tetrachloride. A catalyst for olefin polymerization comprising a reaction product of the following components: a. the catalyst component according to any of claims 1-9; b. an alkylaluminum compound, which is preferably an alkylaluminum compound, represented by the formula AIR _n X ₃ . _n , wherein R is hydrogen or C 1 -C 20 hydrocarbyl, X is halogen and 0 <n <3; and c. optionally an external electron donor component, which is preferably an organosilicon compound, represented by the formula (R ⁵ ) kSi (OR ^s ) 4. _k , where 0 <k <3; R ⁵ is selected from a group consisting of halogen, a hydrogen atom, unsubstituted C 1 -C 20 alkyl or C 1 -C 20 haloalkyl, substituted or unsubstituted C 3 -C 20 cycloalkyl, substituted or unsubstituted C 6 -C 20 aryl or amino; and R ⁶ is unsubstituted Ci-C2O alkyl or Ci-C ₂₀ haloalkyl, substituted or unsubstituted C ₃ -C ₂₀ -cycloalkyl, substituted or unsubstituted C _s -C ₂₀ -aryl or amino. A catalyst according to claim 10, wherein a molar ratio of component a and component b, measured as titanium to aluminum, is in a range of 1: (5-1000), preferably 1: (25100); and a molar ratio of component c and component a, measured as external Electron donor to titanium, in the range of (0-500): 1, preferably (25-100): 1. A prepolymerization catalyst for olefin polymerization comprising a prepolymer obtained by a prepolymerization of the catalyst component according to any of claims 19 and / or the catalyst according to claim 10 or 11 with olefin and multiple of the prepolymerization in 10 is in the range of 0.1-1000 g of olefin prepolymer / g of catalyst component. A method for olefin polymerization, comprising performing olefin polymerization in the presence of at least one of the catalyst component according to any of claims 1-9, the catalyst according to claim 10 or 11 and the prepolymerization catalyst according to claim 12, Wherein preferably the olefin is represented by the formula CH ₂ = CHR ', wherein R' is hydrogen, substituted or unsubstituted C ₁ -C ₁₂ alkyl or substituted or unsubstituted C ₆ -C 8 aryl and more preferably the olefin ethylene or propylene is.