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Catalyst used for ethylene polymerization or copolymerization and its preparation method

A technology of ethylene polymerization and catalyst, which is applied in the field of catalyst components, can solve the problems of insensitivity to hydrogenation, unfavorable polymers, etc., and achieve the effects of low fine powder content, good hydrogenation sensitivity, and high catalytic activity

Active Publication Date: 2006-03-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the catalyst is used for ethylene polymerization, it still has the disadvantage of insensitivity to hydrogen adjustment, which will be unfavorable for using a catalyst to produce polymers with a wide molecular weight distribution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Catalyst preparation:

[0037] Under the protection of nitrogen, 4.0 grams of magnesium chloride, 120 milliliters of hexane and 0.4 grams of sucrose fatty acid ester were sequentially added to the reaction kettle with a stirrer at a stirring speed of 450 rpm. After two hours of reaction, add 30 ml of diethylaluminum chloride dropwise, maintain 35°C for 2 hours after esterification reaction, raise the temperature to 60°C, add 15 ml of titanium tetrachloride dropwise, and react with titanium for 2 hours to obtain a light yellow slurry ; Filter off the mother liquor, add 100 milliliters of titanium tetrachloride, add 3.0 milliliters of tetraethoxysilane dropwise at 60 ° C, heat up to 120 ° C and keep the temperature for 1 hour, filter the mother liquor, wash with hexane for 4 times, add 150 ml of hexane ml, 5.0 ml of silicon tetrachloride was added dropwise at 60° C., washed with hexane twice after constant temperature for one hour, and dried to obtain a solid catalyst com...

Embodiment 2

[0042] Catalyst preparation:

[0043] Under the protection of nitrogen, 4.0 grams of magnesium chloride, 120 milliliters of hexane and 0.5 milliliters of alkylphenol polyoxyethylene ethers were successively added to the reaction kettle with a stirrer, the stirring speed was 450 rpm, at room temperature, 10 milliliters of ethanol was added dropwise, and the temperature was raised to After two hours of alcohol reaction at 30°C, 33 ml of diethylaluminum chloride was added dropwise, and after the esterification reaction was maintained at 35°C for 2.0 hours, the temperature was raised to 60°C, and 15 ml of titanium tetrachloride was added dropwise for 2 hours to react with titanium tetrachloride to obtain shallow Yellow slurry. Filter off the mother liquor, wash 4 times with organic solvent hexane, add 150 ml of hexane, add dropwise 5.0 ml of silicon tetrachloride at 60 ° C, keep the temperature for one hour, wash with hexane twice, and dry to obtain a solid catalyst component . ...

Embodiment 3

[0046] Catalyst preparation:

[0047] Under the protection of nitrogen, 4.0 grams of magnesium chloride, 120 milliliters of hexane and 0.9 milliliters of 2-hydroxyethyl acrylate were successively added to the reaction kettle with a stirrer, the stirring speed was 450 rpm, at room temperature, 15 milliliters of ethanol was added dropwise, and the temperature was raised to 30 After alcoholization reaction at ℃ for two hours, 45 ml of diethylaluminum chloride (prepared as a hexane solution with a molar concentration of 1.479) was added dropwise. After reacting for 2 hours with milliliter of loaded titanium, a light yellow slurry was obtained. Filter off the mother liquor, wash 4 times with organic solvent hexane, add 150 ml of hexane, add dropwise 10.0 ml of silicon tetrachloride at 60 ° C, keep the temperature for one hour, wash with hexane twice, and dry to obtain a solid catalyst component .

[0048] polymerization

[0049] With embodiment 1, the results are shown in Table ...

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PUM

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Abstract

A catalyst for the polymerizing and copolymerizing of ethene and its preparing process are disclosed. Its active component is composed of Mg compound, the emtrol with 1-12 carbon atoms, at least one unsaturated ester of fatty acid containing one or more hydroxy radicals and / or at least one water-in-oil non-ionic surfactant, organo aluminium compound, or Ti compound, and at one hydrogenating improver. Its advantages are high activity and good granular form.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization or copolymerization and its preparation method. Background technique [0002] Since the 1970s, Japan's Mitsui Petrochemical Industry Co., Ltd. and other companies have successfully developed a variety of Ti-Mg high-efficiency carrier catalysts with magnesium chloride as the carrier, which has enabled the rapid development of the world's slurry production of polyolefin industry. A more representative technology is the method of ethylene polymerization and copolymerization disclosed by Mitsui Oil & Chemical in Japanese Patent JP49-51378. The specific preparation method of the catalyst is: the reaction of magnesium dichloride and ethanol after grinding and pulverizing in a lamp oil medium to form MgCl: 6C 2 h 5 OH alcoholate slurry, and then react with diethylaluminum chloride to remove most of the ethanol, and finally use titanium tetrachloride for titanium loading reacti...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/645
Inventor 王志武谭忠郭正阳寇鹏杨世峰周俊领王宇刘翠莲李凤奎尹珊珊任春红
Owner CHINA PETROLEUM & CHEM CORP
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