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Catalyst component for ethylene polymerization and catalyst thereof

An ethylene polymerization and catalyst technology, applied in the field of catalyst components, can solve problems such as unsatisfactory hydrogen adjustment sensitivity, and achieve the effect of less subdivision content and high catalytic activity

Active Publication Date: 2012-02-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrogen tuning sensitivity of the catalyst systems mentioned above is not satisfactory.

Method used

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  • Catalyst component for ethylene polymerization and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of catalyst components: In the reactor fully replaced by high-purity nitrogen, add 4.0g magnesium dichloride (0.042mol), 60ml toluene, 19.2g (0.084mol) tetraethoxytitanium, 6.9ml (0.1176mol) ethanol, 3ml (0.0135mol) tetraethoxysilane, heated up to 70°C for reaction under stirring, and reacted at 70°C for 1 hour after the solid was completely dissolved to form a uniform solution. Cool down to 65°C, slowly add 21ml of 2M monochlorodiethylaluminum heptane solution dropwise, and maintain the reaction at 65°C for 1 hour, then raise the temperature to 90°C and continue the reaction for 1 hour. Cool the system to 30°C, let the solid precipitate, filter the filtrate, and wash the solid twice with 60ml hexane, add 60ml hexane to the solid and stir, slowly add 60ml titanium tetrachloride dropwise, and react at 30°C for 1 hour. Stirring was stopped, and the suspension was left to stand, the suspension was quickly separated into layers, the upper clear layer was rem...

Embodiment 2

[0046] (1) The synthesis of the catalyst component is the same as in Example 1. Only the amount of ethanol was changed from 6.9ml to 4.9ml.

[0047] (2) Ethylene polymerization is with embodiment 1. The catalyst composition and polymerization results are shown in Table 1.

Embodiment 3

[0049] (1) The synthesis of the catalyst component is the same as in Example 2. Just change diethylaluminum chloride to isobutylaluminum dichloride.

[0050] (2) Ethylene polymerization is with embodiment 1. The catalyst composition and polymerization results are shown in Table 1.

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Abstract

The invention relates to a catalyst component for ethylene polymerization, a catalyst and a preparation method thereof, and the catalyst component is obtained by the following reaction steps: (1) performing reaction of a magnesium compound, an organic alcohol compound and at least one organic titanium compound, at least one silicon compound to obtain a reaction product A; (2) allowing the reaction product A to react with at least one organic aluminium compound to obtain a reaction product B; (3) allowing the reaction product B to react with at least one inorganic titanium compound to obtain the final catalyst component. The catalyst of the invention has the advantages of high catalytic activity, good hydrogen response, narrow polymer particle size distribution, and the like, and is quite applicable to the slurry polymerization technology of ethylene, and combined polymerization technology which requires catalysts with high activity.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization, a method for preparing the catalyst component and the catalyst. technical background [0002] As we all know, the catalyst system containing Ti / Mg composite plays a dominant role in the industrial production of polyethylene, and the core of its research is nothing more than the polymerization activity of the catalyst, the particle shape and particle size distribution of the catalyst, the hydrogen adjustment sensitivity and Copolymerization performance and so on. In the slurry polymerization process of ethylene, in addition to requiring the catalyst to have high catalytic activity, it is very important to control the particle size and particle size distribution of the produced ethylene polymer. In the process of ethylene polymerization, especially the slurry polymerization of ethylene, it is easy to produce polymer fine powder, which is easy to generate static electricit...

Claims

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Application Information

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IPC IPC(8): C08F110/02C08F210/02C08F210/16C08F4/646C08F4/654C08F4/655C08F4/656
Inventor 郭子方周俊领杨红旭张韬毅苟清强
Owner CHINA PETROLEUM & CHEM CORP
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