Method for preparing terpolymer for carrier of olefin polymerization catalyst

A technology of carrier and styrene, which is applied in the field of terpolymer preparation, can solve the problems of uncontrollable particle specific surface area and average pore size, unfavorable loading of metallocene catalysts, small particle size of polymer particles, etc., to achieve uniform size, The effect of low inorganic ash content and narrow dispersion

Active Publication Date: 2015-04-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses a two-step swelling method to prepare monodisperse porous microspheres. The preparation method is relatively complicated and the prepared polymer particles have a small particle size. The specific surface area and average pore size of the particles are uncontrollable, which is not conducive to the loading of metallocene catalysts.

Method used

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  • Method for preparing terpolymer for carrier of olefin polymerization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of organic porous support: In a 250ml glass reactor, add 150ml ethanol and 15ml deionized water, then add 6ml (about 5.6g) styrene, 8ml55% (about 7.5g) divinylbenzene and 5ml methacrylic acid Hydroxyethyl ester (about 5.0g), styrene and divinylbenzene are used to remove the polymerization inhibitor with 10% NaOH solution before use, and then washed with deionized water for 3 times before use, and hydroxyethyl methacrylate is used in neutral The alumina chromatographic column was used after removing the polymerization inhibitor. Stir at room temperature for 5 minutes, then add 2% polyvinyl alcohol (polymerization degree: 1750) by monomer mass, stir for 1 hour at 45°C to dissolve the polyvinyl alcohol stabilizer, then add 10ml DNBP, and 1.5% monomer mass AIBN, heated up to 70°C, reacted for 3 hours, then raised the temperature to 80°C, reacted for 5 hours, stirred at 600 rpm, washed 3 times with ethanol, dried to obtain a porous organic carrier.

Embodiment 2

[0019] Preparation of organic porous support: In a 250ml glass reactor, add 108ml ethanol and 12ml deionized water, then add 3ml (about 2.7g) styrene, 4ml55% (about 3.7g) divinylbenzene and 2ml methacrylic acid Hydroxyethyl ester (about 2.0g), styrene and divinylbenzene use 10% NaOH solution to remove the polymerization inhibitor before use, and then use it after washing 3 times with deionized water. Use neutral hydroxyethyl methacrylate The alumina chromatographic column was used after removing the polymerization inhibitor. Stir at room temperature for 5 minutes, then add 2% polyvinyl alcohol (polymerization degree: 1750) of monomer mass, stir for 1 hour at 45°C, dissolve the polyvinyl alcohol stabilizer, then add 4ml DNBP, and 1.5% monomer mass of AIBN, heated up to 70°C, reacted for 3 hours, then raised the temperature to 80°C, reacted for 5 hours, stirred at 600 rpm, washed 3 times with ethanol, dried to obtain a porous organic carrier.

Embodiment 3

[0021] The preparation of the organic porous carrier in Example 3 is the same as in Example 2 except that the amount of porogen used is different, and the preparation steps are the same as the amount of other reagents. In Example 3, 7ml DNBP was added instead of 4ml DNBP.

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Abstract

The invention relates to a method for preparing a carrier of an olefin polymerization catalyst. The carrier is a terpolymer polymerized by divinyl benzene, styrene and hydroxyethyl methylacrylate. The carrier is prepared by a dispersion polymerization method, the reaction monomers divinyl benzene, styrene and hydroxyethyl methylacrylate are sequentially added into a dispersion liquid, the particle shape of the terpolymer carrier is controlled by adding a stabilizing agent, and the pore diameter of the terpolymer carrier is adjusted by adding a pore-foaming agent. The terpolymer carrier prepared by the method is monodisperse porous microsphere, the particle size and pore diameter of the carrier are controllable, loading of a metallocene catalyst system is facilitated, and the formed catalyst has a relatively high activity.

Description

technical field [0001] The invention relates to a preparation method of a terpolymer used for olefin polymerization catalyst carrier. technical background [0002] At present, the vast majority of commercial olefin polymerization catalysts use supported catalysts, and the catalysts usually use inorganic substances to support the catalyst. Patents CN98126385, CN1174549, and CN1356343 report that inorganic substances such as magnesium chloride, silicon dioxide, aluminum oxide, magnesium carbonate, etc. are used as carriers to prepare supported Ziegler-Natta and metallocene catalysts, but these inorganic carriers will affect the performance of polyolefins after being introduced into polymers . In recent years, due to the unique properties of organic polymer carriers with porous structures, such as high activity and good copolymerization performance, especially the prepared polymer products have low inorganic ash content, etc., they are increasingly attracting attention from in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/02C08F10/00C08F212/36C08F212/08C08F220/28C08F2/00C08J9/28
Inventor 王雄徐人威朱博超韩晓昱刘义郝萍姚培洪贾军纪任峰吴江王丹丹许云波巨娟侠高冬梅
Owner PETROCHINA CO LTD
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