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Catalyst for ethylene polymerization and components thereof

A technology of ethylene polymerization and catalyst, which is applied in the direction of chemical recovery, etc., can solve the problems of unsatisfactory hydrogen adjustment sensitivity, etc., and achieve the effect of good comprehensive performance, narrow polymer particle size distribution, and high catalytic activity

Active Publication Date: 2008-10-01
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 for ethylene polymerization and components thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of catalyst components: in the reactor fully replaced by high-purity nitrogen, add 4.0g magnesium dichloride, toluene 60ml, epichlorohydrin 2.0ml, tributyl phosphate 6.0ml, ethanol 3.4ml successively, The temperature was raised to 65° C. under stirring, and when the solid was completely dissolved to form a uniform solution, 5.5 ml of 2-ethylhexanol was added dropwise (the molar ratio of ethanol to 2-ethylhexanol was 1.4:1.0).

[0046] React at 65°C for 1 hour. The system was cooled to -5°C, 60ml of titanium tetrachloride was slowly added dropwise, and then 3ml of tetraethoxysilane was added to react for 0.5 hours. Slowly heat up to 85°C and react for 2 hours. Stop stirring, let it stand, the suspension will be layered quickly, the upper layer will be removed, the solid will be washed with hexane, and then dried with high-purity nitrogen to obtain solid catalyst solid particles with good fluidity and narrow particle size distribution. The catalyst compo...

Embodiment 2

[0050] (1) The synthesis of catalyst is the same as in Example 1. Just change the consumption of 2-ethylhexanol from 5.5ml to 7.7ml (the molar ratio of ethanol to 2-ethylhexanol is 1.4:1.4).

[0051] (2) Ethylene polymerization is with embodiment 1. The catalyst composition and polymerization results are shown in Table 1.

Embodiment 3

[0053] (1) The synthesis of catalyst is the same as in Example 2. Just change the amount of 2-ethylhexanol to 3.3ml (the molar ratio of ethanol to 2-ethylhexanol is 1.4:0.6).

[0054] (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 that is used in ethane homopolymerization or copolymerization of ethane with other alpha-alkene and a preparation method thereof, wherein, the catalyst component comprises a magnesium complex substance, at least a titanium compound, at least an organic alcoholic compound with carbon atom number more than 5 and at least a reaction product of an organic silicon compound; the magnesium complex substance is prepared by dissolving a magnesium compound in a system of organic epoxy compounds and organic phosphorous compounds. The catalyst of the invention has the advantages of relatively high catalytic activity, relatively good hydrogen modulation sensibility, polymer with narrow particle diameter distribution, polymer with high stacking density, etc., and is extremely applicable to slurry polymerization technique of ethane.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization or copolymerization, a method for preparing the catalyst component and a catalyst for the catalyst component. 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 finer polymer parti...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/645
CPCY02P20/584
Inventor 郭子方陈伟周俊领王洪涛杨红旭李瑞霞张韬毅徐世媛王丽莎
Owner CHINA PETROLEUM & CHEM CORP
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