Catalyst component for olefin polymerization, catalyst, and use thereof

Patent metadata

Field	Value
Publication number	US-2016115257-A1
Application number	US-201414892533-A
Country	US
Kind code	A1
Filing date	May 21, 2014
Priority date	May 21, 2013
Publication date	Apr 28, 2016
Grant date	—

Abstract

The present disclosure provides a solid catalyst component for olefin polymerization, comprising magnesium, titanium, a halogen, and an electron donor, wherein the electron donor is at least one selected from the group consisting of diol diester compounds as shown in Formula (I). The catalyst according to the present disclosure has significantly improved polymerization activity, hydrogen response, and stereoselectivity. According to the present disclosure, when the catalyst system containing a diol diester compound as shown in Formula (I) of the present disclosure is used in olefin polymerization, the catalyst shows good comprehensive performance, including high catalytic activity. In particular, in the presence of highly concentrated hydrogen, the catalyst has an improved hydrogen response and/or isotacticity of the polymers obtained can be significantly improved. The catalyst of the present disclosure is beneficial for obtaining polymers with a high melt index and high isotacticity, and for development of polymers of different grades.

First claim

1 . (canceled)

2 . (canceled)

3 . (canceled)

4 . A catalyst component for olefin polymerization, comprising magnesium, titanium, a halogen, and an electron donor, wherein the electron donor is at least one selected from the group consisting of diol diester compounds, wherein the diol diester compounds are one or more selected from the group consisting of
2,4-hexanediol-bis(4-ethyl benzoate), 2,4-hexanediol-bis(4-n-propyl benzoate), 2,4-hexanediol-bis(4-n-butyl benzoate), 2,4-hexanediol-bis(4-iso-butyl benzoate), 2,4-hexanediol-bis(4-tert-butyl benzoate), 2,4-hexanediol-bis(4-hexyl benzoate), 3-methyl-2,4-hexanediol-bis(4-ethyl benzoate), 3-methyl-2,4-hexanediol-bis(4-n-propyl benzoate), 3-methyl-2,4-hexanediol-bis(4-n-butyl benzoate), 3-methyl-2,4-hexanediol-bis(4-iso-butyl benzoate), 3-methyl-2,4-hexanediol-bis(4-tert-butyl benzoate), 3-methyl-2,4-hexanediol-bis(4-hexyl benzoate), 3-ethyl-2,4-hexanediol-bis(4-ethyl benzoate), 3-ethyl-2,4-hexanediol-bis(4-n-propyl benzoate), 3-ethyl-2,4-hexanediol-bis(4-n-butyl benzoate), 3-ethyl-2,4-hexanediol-bis(4-iso-butyl benzoate), 3-ethyl-2,4-hexanediol-bis(4-tert-butyl benzoate), 3-ethyl-2,4-hexanediol-bis(4-hexyl benzoate), 3,5-heptanediol-bis(4-n-propyl benzoate), 3,5-heptanediol-bis(4-iso-propyl benzoate), 3,5-heptanediol-bis(4-iso-butyl benzoate), 3,5-heptanediol-bis(4-tert-butyl benzoate), 3,5-heptanediol-bis(4-pentyl benzoate), 3,5-heptanediol-bis(4-hexyl benzoate), 3,5-heptanediol-cinnamic acid-4-ethyl benzoate, 4-methyl-3,5-heptanediol-bis(4-ethyl benzoate), 4-methyl-3,5-heptanediol-bis(4-n-propyl benzoate), 4-methyl-3,5-heptanediol-bis(4-iso-propyl benzoate), 4-methyl-3,5-heptanediol-bis(4-n-butyl benzoate), 4-methyl-3,5-heptanediol-bis(4-iso-butyl benzoate), 4-methyl-3,5-heptanediol-bis(4-tert-butyl benzoate), 4-methyl-3,5-heptanediol-bis(4-pentyl benzoate), 4-methyl-3,5-heptanediol-bis(4-hexyl benzoate), 4-methyl-3,5-heptanediol-cinnamic acid-4-ethyl benzoate, 4-ethyl-3,5-heptanediol-bis(4-ethyl benzoate), 4-ethyl-3,5-heptanediol-bis(4-n-propyl benzoate), 4-ethyl-3,5-heptanediol-bis(4-iso-propyl benzoate), 4-ethyl-3,5-heptanediol-bis(4-n-butyl benzoate), 4-ethyl-3,5-heptanediol-bis(4-iso-butyl benzoate), 4-ethyl-3,5-heptanediol-bis(4-tert-butyl benzoate), 4-ethyl-3,5-heptanediol-bis(4-pentyl benzoate), 4-ethyl-3,5-heptanediol-bis(4-hexyl benzoate), 4-ethyl-3,5-heptanediol-cinnamic acid-4-ethyl benzoate, 4-n-propyl-3,5-heptanediol-bis(4-tert-butyl benzoate), 4-n-butyl-3,5-heptanediol-bis(4-tert-butyl benzoate), 4,4-dimethyl-3,5-heptanediol-bis(4-tert-butyl benzoate), 4-methyl-4-ethyl-3,5-heptanediol-bis(4-tert-butyl benzoate), 4-methyl-4-n-propyl-3,5-heptanediol-bis(4-tert-butyl benzoate), 3-methyl-2,4-heptanediol-bis(4-n-propyl benzoate), 3-methyl-2,4-heptanediol-bis(4-iso-propyl benzoate), 4-methyl-3,5-octanediol-bis(4-tert-butyl benzoate), 4-ethyl-3,5-octanediol-bis(4-tert-butyl benzoate), 4-n-propyl-3,5-octanediol-bis(4-tert-butyl benzoate), 4-n-butyl-3,5-octanediol-bis(4-tert-butyl benzoate), 4,4-dimethyl-3,5-octanediol-bis(4-tert-butyl benzoate), 4,4-diethyl-3,5-octanediol-bis(4-n-propyl benzoate), 4,4-di-n-propyl-3,5-octanediol-bis(4-tert-butyl benzoate), 4-methyl-4-ethyl-3,5-octanediol-bis(4-tert-butyl benzoate), 4,6-nonanediol-bis(4-ethyl benzoate), 4,6-nonanediol-bis(4-n-propyl benzoate), 4,6-nonanediol-bis(4-n-butyl benzoate), 4,6-nonanediol-bis(4-iso-butyl benzoate), 4,6-nonanediol-bis(4-tert-butyl benzoate), 4,6-nonanediol-bis(4-hexyl benzoate), 4,6-nonanediol-cinnamic acid-4-ethyl benzoate, 5-methyl-4,6-nonanediol-bis(4-ethyl benzoate), 5-methyl-4,6-nonanediol-bis(4-n-propyl benzoate), 5-methyl-4,6-nonanediol-bis(4-n-butyl benzoate), 5-methyl-4,6-nonanediol-bis(4-iso-butyl benzoate), 5-methyl-4,6-nonanediol-bis(4-tert-butyl benzoate), 5-methyl-4,6-nonanediol-bis(4-hexyl benzoate), 5-ethyl-4,6-nonanediol-bis(4-ethyl benzoate), 5-ethyl-4,6-nonanediol-bis(4-n-propyl benzoate), 5-ethyl-4,6-nonanediol-bis(4-n-butyl benzoate), 5-ethyl-4,6-nonanediol-bis(4-iso-butyl benzoate), 5-ethyl-4,6-nonanediol-bis(4-tert-butyl benzoate), 5-ethyl-4,6-nonanediol-bis(4-hexyl benzoate), 5-n-propyl-4,6-nonanediol-bis(4-tert-butyl benzoate), 5-n-butyl-4,6-nonanediol-bis(4-n-butyl benzoate), 5,5-dimethyl-4,6-nonanediol-bis(4-tert-butyl benzoate), 5,5-diethyl-4,6-nonanediol-bis(4-hexyl benzoate), 5,5-di-n-propyl-4,6-nonanediol-bis(4-pentyl benzoate), and 5,5-dibutyl-4,6-nonanediol-bis(4-tert-butyl benzoate).

5 . The catalyst component according to claim 4 , wherein the catalyst component is prepared by reacting magnesium compounds, titanium compounds, and the diol diester compounds as shown in Formula (I).

6 . The catalyst component according to claim 5 , wherein the magnesium compounds are selected from the group consisting of magnesium dihalides, alkoxy magnesium compounds, alkyl magnesium compounds, hydrates or alcoholates of magnesium dihalides, and derivatives of magnesium dihalides with halogen atoms thereof being substituted by alkoxy groups or halogenated alkoxy groups, preferably magnesium dihalides and alcoholates thereof; and
wherein the titanium compounds have a general formula of TiX m (OR 1 ) 4-m , with R 1 being a C 1 to C 20 hydrocarbyl group, X a halogen, and 1≦m≦4, preferably being titanium tetrachloride.

7 . The catalyst component according to claim 5 , wherein based on one mol of the magnesium compounds, the dosage of the titanium compounds is in the range from 0.5 mol to 150 mol, and that of the diol diester compounds as shown in Formula (I) in the range from 0.01 mol to 5 mol, preferably from 0.02 mol to 2 mol, and more preferably from 0.02 mol to 4 mol.

8 . A catalyst for olefin polymerization, comprising the following components: component a): the catalyst component according to claim 4 ; and
component b): alkylaluminum compounds.

9 . The catalyst according to claim 8 , further comprising component c): an external electron donor, which is selected from the group consisting of organosilicon compounds, ethers, and esters.

10 . The catalyst according to claim 8 , wherein the molar ratio of component a) to component b) based on the molar ratio of titanium to aluminum is in the range from 1:5 to 1:1,000, and/or the molar ratio of component c) to component a) is in the range from 0:1 to 500:1.

11 . A prepolymerization catalyst for olefin polymerization, comprising the catalyst according to claim 8 , and a prepolymer generated by prepolymerization between said catalyst and olefins, with the prepolymerization multiples thereof being 0.1 g to 1,000 g of olefin polymers per g of the catalyst component.

12 . A method for olefin polymerization, wherein the olefin polymerization is performed in the presence of the catalyst component according to claim 4 .

13 . The method according to claim 12 , wherein the olefins have a general formula of CH 2 ═CHR, with R being hydrogen or a C 1 to C 12 alkyl or aryl group, preferably selected from propylene and ethylene.

14 . The catalyst component according to claim 6 , wherein based on one mol of the magnesium compounds, the dosage of the titanium compounds is in the range from 0.5 mol to 150 mol, and that of the diol diester compounds as shown in Formula (I) in the range from 0.01 mol to 5 mol, preferably from 0.02 mol to 2 mol, and more preferably from 0.02 mol to 4 mol.

15 . The catalyst according to claim 9 , wherein the molar ratio of component a) to component b) based on the molar ratio of titanium to aluminum is in the range from 1:5 to 1:1,000, and/or the molar rat

Assignees

• China Petroleum & Chemical
• Beijing Res Inst Chem Ind

Inventors

• Li Changxiu
• Gao Mingzhi
• Liu Haitao
• Chen Jianhua
• Ma Jing
• Ma Jixing
• Cai Xiaoxia
• Wang Jun
• Zhang Xiaofan
• Hu Jianjun

Classifications

• C08F10/06 Primary

  Propene · CPC title

• C08F10/00 Primary

  Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond · CPC title

• C08F4/643 Primary

  Component covered by group C08F4/64 with a metal or compound covered by group C08F4/44 other than an organo-aluminium compound {(C08F4/64003 - C08F4/64196 take precedence)} · CPC title

• C08F4/651

  Pretreating with non-metals or metal-free compounds · CPC title

• C08F4/658

  with metals or metal-containing compounds, not provided for in a single group of groups C08F4/653 - C08F4/657 · CPC title