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 long production cycle, slow catalyst sedimentation and precipitation, and many polymer fine powders.

Active Publication Date: 2011-04-20
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

[0043] (1) Preparation of catalyst components

[0044]In the reactor fully replaced by high-purity nitrogen, 5.0g of diethoxymagnesium and 80ml of toluene were successively added to the reactor at room temperature, and stirring was started, then 4.0ml of boron trichloride was added to react for 2.0hr, and then cyclic 6.0ml of oxychloropropane and 3.6ml of ethanol were heated to 70°C under stirring, and reacted at 70°C for 1 hour when the solid was completely dissolved to form a uniform solution. The system was cooled to -15°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 good fluidity and narrow particle size ...

Embodiment 2

[0048] (1) The synthesis of catalyst is the same as in Example 1. The amount of ethanol was changed from 3.6ml to 4.9ml.

[0049] (2) Ethylene polymerization is with embodiment 1. Catalyst composition and polymerization results are shown in Table 1 and Table 2.

Embodiment 3

[0051] (1) Preparation of catalyst components: In a reactor fully replaced by high-purity nitrogen, 5.0 g of diethoxymagnesium, 80 ml of toluene, and 80 ml of toluene were successively added to the reactor at room temperature, and then 4.0 ml of trichloro Boronization was reacted for 2.0 hours, then 6.0ml of epichlorohydrin and 3.6ml of ethanol were added, and the temperature was raised to 70°C under stirring. When the solid was completely dissolved and a uniform solution was formed, the reaction was carried out at 70°C for 1 hour. The system was cooled to -15°C, and 40ml of titanium tetrachloride was slowly added dropwise, followed by 4.5ml of 1,1,3,3-tetraethoxy-divinyldisiloxane, and reacted 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 ...

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Abstract

The invention provides a catalyst component used for vinyl polymerization. The catalyst component comprises the following components: a magnesium composite, a titanium compound and an organosilicon compound, wherein the magnesium composite is a product prepared by dissolving alkoxy magnesium in a solvent system containing an organic epoxy compound, boron trihalide and at least one kind of organicalcohol; the titanium compound has the general formula of Ti(OR)aXb, wherein R refers to aliphatic hydrocarbon group or aryl group with 1 to 14 carbon atoms, X refers to halogen, a is 0, 1 or 2, b isan integer from 1 to 4, and a+b=3 or 4; and the organosilicon compound has at least one structural formula of a structural formula a, a structural formula b and a structural formula C.

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 Applications(China)
IPC IPC(8): C08F4/654C08F4/651C08F10/02
Inventor 张韬毅郭子方周俊领王洪涛苟清强杨红旭徐世媛王丽莎
Owner CHINA PETROLEUM & CHEM CORP
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