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Catalyst component applied to vinyl polymerization reaction and catalyst thereof

An ethylene polymerization and catalyst technology, applied in the field of catalyst components, can solve the problems of high catalyst cost, increased processing difficulty, unexplained hydrogen modulation sensitivity of compound electron donors, etc.

Active Publication Date: 2012-12-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The related patent CN1699433 of the spherical catalyst applied to the polymerization of propylene uses titanium tetrachloride as the dealcoholization agent, and the esters used are compound electron donors of monoesters and diesters. Although the activity of the catalyst is significantly improved, the author does not Explain the effect of recombined electron donors on the sensitivity of hydrogen modulation; in addition, this patent is only applicable to propylene polymerization
In this patent, due to the use of a large amount of titanium tetrachloride for treatment, the catalyst cost is high and the obtained titanium-containing waste liquid is more, which increases the difficulty of post-treatment of the production process

Method used

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  • Catalyst component applied to vinyl polymerization reaction and catalyst thereof
  • Catalyst component applied to vinyl polymerization reaction and catalyst thereof
  • Catalyst component applied to vinyl polymerization reaction and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of catalyst components

[0046] In the reactor fully replaced by high-purity nitrogen, add 6.0g spherical carrier MgCl in sequence 2 2.6C 2 h 5 OH, 150ml of hexane, cooled down to -10°C with stirring, added dropwise 30ml of tri-n-hexylaluminum in hexane (tri-n-hexylaluminum: 1.2M), 1ml of n-octyl acetate, 8ml of benzenesulfonyl chloride, and then heated to 50 °C and maintain the reaction for 3 hours. Stirring was stopped and the mixture was left standing, the suspension was quickly separated into layers, the supernatant was sucked off, and the precipitate was washed twice with hexane at room temperature. Add 150ml of hexane, cool the system to 0°C, slowly add 4ml of titanium tetrachloride and 0.5ml of tetrabutoxytitanium dropwise, then raise the temperature to 60°C, and react for 2 hours. Stop stirring, let it stand, the suspension will be layered quickly, and the supernatant will be pumped out. After the precipitate is washed twice with hexane, it w...

Embodiment 2

[0054] (1) Preparation of catalyst components

[0055] In the reactor fully replaced by high-purity nitrogen, add 6.0g spherical carrier MgCl in sequence 2 2.6C 2 h 5 OH, 150ml hexane, cooled down to 0°C with stirring, added dropwise 20ml triethylaluminum hexane solution (triethylaluminum: 1.2M), 1ml n-octyl acetate and 10ml benzenesulfonyl chloride, then heated to 50°C , and maintain the reaction for 3 hours. Stirring was stopped and the mixture was left standing, the suspension was quickly separated into layers, the supernatant was sucked off, and the precipitate was washed twice with hexane at room temperature. Add 150ml of hexane, cool the system to 0°C, slowly add 4ml of titanium tetrachloride and 0.3ml of tetrabutoxytitanium dropwise, then raise the temperature to 60°C, and react for 2 hours. Stop stirring, let it stand, the suspension will be layered quickly, and the supernatant will be pumped out. After the precipitate is washed twice with hexane, it will be transf...

Embodiment 3

[0060] (1) Preparation of catalyst components

[0061] In the reactor fully replaced by high-purity nitrogen, add 36.0g spherical carrier MgCl in sequence 2 2.6C 2 h 5 OH, 750ml of hexane, cooled down to -10°C with stirring, added dropwise 200ml of triethylaluminum in hexane (triethylaluminum: 1.2M), 5ml of n-octyl acrylate, and 15ml of n-butyl benzenesulfonate, The temperature was then raised to 50 °C and the reaction was maintained for 3 hours. Stirring was stopped and the mixture was left standing, the suspension was quickly separated into layers, the supernatant was sucked off, and the precipitate was washed twice with hexane at room temperature. Add 800ml of hexane, cool the system to 0°C, slowly add 30ml of titanium tetrachloride and 3ml of tetraethoxy silicon dropwise, then raise the temperature to 60°C, and react for 2 hours. Stop stirring, let it stand, the suspension will be layered quickly, and the supernatant will be pumped out. After the precipitate is washed ...

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Abstract

The invention relates to a catalyst component applied to a vinyl polymerization reaction, a preparation method of the catalyst component and a catalyst thereof. The catalyst component comprises a magnesium-alcohol compound, a titanium compound, an alkoxy compound, an organic aluminum compound, a long-carbon-chain monoester compound and a sulfuryl-containing compound. The catalyst has proper activity and very high hydrogen regulation sensitivity; and the piling density of obtained polymer powder is high, and the molecular weight distribution is wide.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization, a preparation method of the catalyst component and a catalyst thereof. More specifically, it relates to an ethylene polymerization catalyst with high hydrogen modulation sensitivity, which can be used to prepare polymers with high bulk density and wide molecular weight distribution. Background technique [0002] During the development of Ziegler-Natta catalysts, electron donors have always been a hot topic in catalyst research due to their ability to significantly improve catalyst performance and polymer stereoselectivity. A key requirement for the Z-N type ethylene polymerization catalyst prepared on the magnesium chloride alcoholate support is that the catalyst has high hydrogen tuning sensitivity and the obtained polymer has high bulk density. In order to obtain the above effects, internal electron donors such as ethers, esters and amines are usually added to the cat...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/645C08F4/649C08F4/646C08F4/658
Inventor 李秉毅杨岭周俊领黄庭寇鹏马永华
Owner CHINA PETROLEUM & CHEM CORP
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