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Catalyst component used for ethylene polymerization reaction and catalyst thereof

A technology for ethylene polymerization and catalyst, which is applied in the field of catalyst components and can solve the problems of reducing the purity of titanium tetrachloride and the like

Active Publication Date: 2011-06-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, we have found that in the industrial production process of the catalyst, since the catalyst has added a lower boiling organosilicon compound such as orthosilicate, it is easy to azeotropically distill together with titanium tetrachloride in the recovery process of catalyst production. Go out, make the titanium tetrachloride purity that recycles use reduce to some extent, therefore, need to provide a kind of new catalyzer to avoid the defective that said catalyzer exists

Method used

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  • Catalyst component used for ethylene polymerization reaction and catalyst thereof
  • Catalyst component used for ethylene polymerization reaction and catalyst thereof
  • Catalyst component used for ethylene polymerization reaction and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Preparation of catalyst components

[0053] In the reactor fully replaced by high-purity nitrogen, 4.0g of magnesium dichloride, 50ml of toluene, 6.0ml of epichlorohydrin, 4.0ml of tributyl phosphate, and 5.6ml of ethanol were sequentially added, and the temperature was raised to 70°C under stirring. After completely dissolving to form a uniform solution, react at 70°C for 1 hour. Cool down to 30°C, add 4.8ml of diethylaluminum chloride with a concentration of 2.2M dropwise, and maintain the reaction at 30°C for 1 hour. The system was cooled to -5°C, 40ml of titanium tetrachloride was slowly added dropwise, and then 3.0ml of hexaethoxydisiloxane was added to react for 1 hour. Slowly heat up to 80°C and react for 2 hours. Stop stirring, let it stand, the suspension will quickly separate into layers, remove the upper clear layer, wash twice with toluene, wash four times with hexane, and blow dry with high-purity nitrogen to obtain a solid catalyst component with goo...

Embodiment 2

[0057] (1) The synthesis of catalyst is the same as in Example 1. The amount of ethanol was changed from 5.6ml to 6.9ml.

[0058] (2) Ethylene polymerization is with embodiment 1. Catalyst composition and polymerization results are shown in Table 1 and Table 2.

Embodiment 3

[0060] (1) The synthesis of catalyst is the same as in Example 2. Only the dosage of diethylaluminum chloride was changed to 3.8ml.

[0061] (2) Ethylene polymerization is with embodiment 1. Catalyst composition and polymerization results are shown in Table 1 and Table 2.

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Abstract

The invention relates to a catalyst component used for ethylene polymerization reaction and a catalyst thereof. The catalyst component contains magnesium composite, titanium compound, organic alcoholic compound and organic silicon compound. The organic silicon compound is selected from at least one of structural formula A, structural formula B and structural formula C. The catalyst production of the invention has simple reclaiming process; and when the catalyst is used for ethylene slurry polymerization, the catalyst has the advantages of high catalytic activity, even grain diameter, narrow grain diameter distribution and better hydrogen regulation sensitivity.

Description

technical field [0001] The 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 containing an organosilicon compound having a special structure, a method for preparing the catalyst component and a 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....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/646C08F10/02
Inventor 张韬毅郭子方周俊领杨红旭李瑞霞徐世媛
Owner CHINA PETROLEUM & CHEM CORP
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