Catalyst component used for ethylene polymerization reaction, catalyst and preparation method thereof

A technology of ethylene polymerization and catalyst, which is applied in the field of catalyst components, and can solve problems such as complex preparation methods, deposition, adhesion of carriers or catalyst particles, etc.

Active Publication Date: 2015-10-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of the above-mentioned patent is relatively complicated, and phase separation between the magnesium chloride and the polymer phase is easy to occur, which in turn causes adhesion between the carrier or catalyst particles
This kind of adhesion will not only cause the fluidity of the carrier or catalyst particles to deteriorate, but also cause the particles of the powder obtained from the polymerization to become coarser.
Coarser powders may pool in the lines and cause blockages

Method used

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  • Catalyst component used for ethylene polymerization reaction, catalyst and preparation method thereof
  • Catalyst component used for ethylene polymerization reaction, catalyst and preparation method thereof
  • Catalyst component used for ethylene polymerization reaction, catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Preparation of catalyst components

[0048] In the reactor fully replaced by high-purity nitrogen, add 6.0g spherical carrier MgCl in sequence 2 2.6C 2 h 5 OH, 120ml hexane, cooled down to -10°C with stirring, added dropwise 50ml triethylaluminum hexane solution (triethylaluminum: 1.2M) and 1ml n-octyl acetate, 0.5ml methyl acrylate, 5mg tert-butyl base hydroperoxide, then the temperature was raised to 60° 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 120ml of hexane, cool the system to 0°C, slowly add 8ml of titanium tetrachloride 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 he...

Embodiment 2

[0054] (1) Preparation of catalyst components

[0055] In the reactor fully replaced by high-purity nitrogen, add 5.0g spherical carrier MgCl in sequence 2 3.0C 2 h 5 OH, 130ml hexane, cooled down to -5°C with stirring, added dropwise 45ml triethylaluminum hexane solution (triethylaluminum: 1.0M) and 1ml ethyl acetate, 0.5ml methyl methacrylate, 5mg over The di-tert-butyl group was oxidized, then the temperature was raised to 50° C., and the reaction was maintained for 2 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 120ml of hexane, cool the system to 0°C, slowly add 6ml of titanium tetrachloride 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 ...

Embodiment 3

[0058] (1) Preparation of catalyst components

[0059] In the reactor fully replaced by high-purity nitrogen, add 4.0g spherical carrier MgCl in sequence 2 2.6C 2 h 5 OH, 100ml hexane, cooled down to -10°C with stirring, added dropwise 30ml triethylaluminum hexane solution (triethylaluminum: 1.2M) and 0.5ml ethyl benzoate, 0.5ml butyl acrylate, 5mg over Diisopropyl dicarbonate was oxidized, then the temperature was raised to 50 °C and the reaction was maintained for 2 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 100ml of hexane, cool the system to 0°C, slowly add 6ml of titanium tetrachloride 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 twi...

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Abstract

The invention discloses a catalyst component used for an ethylene polymerization reaction, a preparation method thereof and a catalyst prepared therefrom. The catalyst component comprises a magnesium alcohol adduct, a titanium compound, acrylate and a derivative thereof, an organic aluminum compound, a monoester compound and a free radical initiator. The catalyst is high in mechanical strength and hydrogen regulation sensitivity and is not liable to break during polymerization. A prepared polyethylene powder material is high in stacking density, is very concentrated in particle size distribution and is less in contents of thick powder and fine powder.

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 a catalyst component for ethylene polymerization containing two types of electron donors, a method for preparing the catalyst component, and a catalyst thereof. Background technique [0002] During the development of Ziegler-Natta catalysts, electron donors have been found to significantly improve the performance of catalysts and polymer powders, so they have gradually become a research hotspot in this field. The key requirements for the Ziegler-Natta type ethylene polymerization catalyst prepared by magnesium chloride alcoholate carrier are: the catalyst has high hydrogen adjustment sensitivity, and the obtained polymer powder has high bulk density. In order to obtain the effect, internal electron donors such as alcohols, ethers, esters and amines are usually added t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/02C08F4/649C08F4/646C08F4/52C08F4/02
Inventor 黄庭周俊领黄文氢杨岭李秉毅寇鹏马永华
Owner CHINA PETROLEUM & CHEM CORP
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