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Catalyst compsns. for olefin polymerization and catalyst thereof

An olefin polymerization and catalyst technology, applied in the field of catalyst components and catalysts, can solve the problems of low activity, wide particle size distribution, low apparent density, etc.

Active Publication Date: 2006-09-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the described silicon / magnesium composite carrier catalyst system, the internal electron donor uses a conventional dibasic aromatic carboxylic acid ester compound, such as di-n-butyl phthalate or di-isooctyl phthalate, etc., and the catalyst When used in olefin polymerization, the activity is low, and the polymer obtained from it has the disadvantages of low apparent density and wide particle size distribution, which is bound to be unfavorable for industrial production.

Method used

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  • Catalyst compsns. for olefin polymerization and catalyst thereof
  • Catalyst compsns. for olefin polymerization and catalyst thereof
  • Catalyst compsns. for olefin polymerization and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] 1. Catalyst synthesis: after high-purity N 2 In the fully replaced glass bottle, add 5.0 g of anhydrous MgCl successively 2 , 120ml of toluene, 8.0ml of epichlorohydrin, and 10.0ml of tributyl phosphate were completely dissolved at 60°C, and the solution was cooled to -25°C, and then 50ml of titanium tetrachloride was dropped into it, at -25°C Stir at low temperature for half an hour, add 3.0 g of silica gel (Davison XPO2485, dry at 600°C for 4 hours before using the silica gel), then slowly raise the temperature to 90°C, add 1.0ml of 9,9-bis(benzylcarboxymethyl)fluorene, It was treated with 40 ml of titanium tetrachloride, filtered, washed twice with toluene and hexane, and dried in vacuo to obtain 10.6 g of a solid catalyst.

[0061] 2. Propylene polymerization: a stainless steel kettle with a volume of 2 liters is heated by N 2 After full replacement, add 11.9 mg of the above solid catalyst, 2.0 mmol of triethylaluminum, 0.1 mmol of cyclohexylmethyldimethoxysilane (C...

Embodiment 2

[0063] 1. Synthesis of catalyst: except that 2,4-pentanediol dibenzoate is used to replace 9,9-bis(benzylcarboxymethyl)fluorene, all the other are the same as in Example 1.

[0064] 2. Polymerization of propylene: same as in Example 1, and the polymerization results are shown in Tables 1 and 2.

Embodiment 3

[0066] 1. Catalyst synthesis: except that 4-methyl-3,5-diheptanol dibenzoate is used to replace 9,9-bis(benzylcarboxymethyl)fluorene, all the other are the same as in Example 1.

[0067] 2. Polymerization of propylene: same as in Example 1, and the polymerization results are shown in Tables 1 and 2.

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Abstract

This invention relates to a catalyst component for alkene polymerization and its catalyst, and magnesium chloride-silica gel composite gel is adopted for this component. By introducing diol ester compounds which have a common formula (I) in the preparation of the catalyst component, the catalytic activity can be promoted. When the catalyst component in this invention is used in propylene polymerization, the obtained polymer has higher apparent density, narrower particle size distribution, high isotacticity, wide molecular weight distribution and outstanding comprehensive properties.

Description

technical field [0001] The present invention relates to a catalyst component and catalyst for olefin polymerization, especially propylene polymerization or copolymerization, and more specifically, to a catalyst component and catalyst using a novel electron donor and a composite carrier. technical background [0002] As we all know, in the synthesis technology of polypropylene, the titanium / magnesium catalyst system is widely used in the synthesis process of isotactic polypropylene due to its high efficiency and high stereospecificity (isotacticity). In the industrial production of polypropylene, there are two main requirements for the catalyst, one is to have a higher activity in the polymerization reaction, and the other is to have a relatively good comprehensive performance of the obtained polymer. The main properties of polypropylene include the isotacticity of the polymer, the molecular weight distribution and the particle shape of the polymer. Among them, the particle ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/06C08F4/649
Inventor 陈伟刘月祥高明智刘海涛谭杨马兆文纪卫民姜涛杨菊秀
Owner CHINA PETROLEUM & CHEM CORP
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