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Catalyst component used for vinyl polymerization and catalyst

An ethylene polymerization and catalyst technology, applied in the field of high-activity catalysts, can solve the problems of narrow polymer particle size distribution, many polymer fine powders, slow catalyst sedimentation and precipitation, etc.

Active Publication Date: 2013-03-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This catalyst system adjusts the magnesium halide dissolution system, but it still has the disadvantages of insensitivity to hydrogen adjustment and a large amount of fine polymer powder
CN1958620A provides a catalyst system suitable for ethylene polymerization and copolymerization, wherein said catalyst components include a magnesium complex, at least one titanium compound, at least one organic alcohol compound and at least one organosilicon compound, The catalyst has the characteristics of high catalytic activity, hydrogen sensitivity and narrow polymer particle size distribution, but all reactants must be strictly dehydrated in the early stage of the preparation process, and the catalyst sedimentation is slow, and the production cycle is long

Method used

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  • Catalyst component used for vinyl polymerization and catalyst
  • Catalyst component used for vinyl polymerization and catalyst
  • Catalyst component used for vinyl polymerization and catalyst

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, 4.0g of magnesium dichloride, 50ml of toluene, 6.0ml of epichlorohydrin, 6.0ml of tributyl borate, 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. The system was cooled to -5°C, 40ml of titanium tetrachloride was slowly added dropwise, and then 3.0ml of γ-(N,N-dimethylaminopropyl)triethoxysilane 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 good fluidity and narrow particle size distribution. The catalyst composition is shown in Table 1.

[0047] (2) Ethylene poly...

Embodiment 2

[0050] (1) The synthesis of catalyst is the same as in Example 1. The consumption of ethanol is changed into 6.9ml, and the consumption of tributyl borate is changed into 7.0ml.

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

Embodiment 3

[0053] (1) The synthesis of catalyst is the same as in Example 2. Just change tributyl borate to trioctyl borate.

[0054] (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 vinyl polymerization, which comprises a component A and a component B, wherein the component A is a solid particle obtained by the steps of dissolving magnesium halide into an organic epoxy compound, an organboron compound and at least one alcohol to form a solution and reacting with titanium tetrahalogen and organosiloxane to separate out; and the component B is alkyl aluminium. The catalyst has the advantages of higher catalytic activity, better hydrogen response, narrow polymer particle size distribution and the like, and has remarkable advantages on the industrial production because the organboron compound does not need removing water.

Description

technical field [0001] The present invention relates to a catalyst component for homopolymerization or copolymerization of ethylene, a preparation method thereof, and a highly active catalyst obtained from the catalyst component. technical background [0002] As we all know, catalyst systems containing Ti / Mg composites play a dominant role in the industrial production of polyolefins, and the core research focuses on the polymerization activity of catalysts, the particle morphology and particle size distribution of catalysts, the sensitivity of catalysts to hydrogen, and the Copolymerization performance and other related fields. Conventional catalysts for olefin polymerization appeared in the 1950s, but due to their low activity, the production process of polyolefins was complicated. With the emergence of magnesium compound-supported catalysts, the catalytic efficiency of the active center of titanium atoms has been greatly improved, so the catalytic activity of the catalyst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/658C08F4/656C08F4/654C08F4/645
Inventor 张韬毅郭子方周俊领王洪涛苟清强杨红旭李瑞霞徐世媛
Owner CHINA PETROLEUM & CHEM CORP
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