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Terpolymer preparation method for olefin polymerization catalyst carrier

A carrier, styrene technology, applied in the field of terpolymer preparation, can solve the problems of uncontrollable particle specific surface area and average pore size, unfavorable for metallocene catalyst loading, small particle size of polymer particles, etc. Low inorganic ash content and narrow dispersion effect

Active Publication Date: 2016-09-07
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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  • Terpolymer preparation method for olefin polymerization catalyst carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of organic porous carrier: In a 250ml glass reactor, add 150ml ethanol and 15ml deionized water, then add 6ml (about 5.6g) styrene, 8ml 55% (about 7.5g) divinylbenzene and 5ml methyl Hydroxyethyl acrylate (about 5.0g), styrene and divinylbenzene, use 10% NaOH solution to remove the polymerization inhibitor before use, and then wash with deionized water for 3 times before use. Hydroxyethyl methacrylate is in use Use after removing the polymerization inhibitor on the silica column. Stir at room temperature for 5 minutes, then add 2% monomer quality polyvinyl alcohol (polymerization degree is 1750) at 45℃, stir for 1 hour, dissolve the polyvinyl alcohol stabilizer, and then add 10ml DNBP and 1.5% monomer quality The AIBN was heated to 70°C and reacted for 3 hours, and then the temperature was raised to 80°C. After 5 hours of reaction, the stirring speed was 600 rpm, washed with ethanol 3 times, and dried to obtain a porous organic carrier.

Embodiment 2

[0019] Preparation of organic porous carrier: In a 250ml glass reactor, add 108ml ethanol and 12ml deionized water, then add 3ml (about 2.7g) styrene, 4ml 55% (about 3.7g) divinylbenzene and 2ml methyl Hydroxyethyl acrylate (approximately 2.0g), 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. Hydroxyethyl methacrylate is in use Use after removing the polymerization inhibitor on the silica column. At room temperature

[0020] Stir for 5min, then add 2% monomer quality polyvinyl alcohol (polymerization degree is 1750) at 45℃, stir for 1h, dissolve the polyvinyl alcohol stabilizer, then add 4ml DNBP, and 1.5% monomer quality AIBN, The temperature was raised to 70°C and reacted for 3 hours, and then the temperature was raised to 80°C. After 5 hours of reaction, the stirring speed was 600 rpm, washed with ethanol for 3 times, and dried to obtain a porous organic ...

Embodiment 3

[0022] The preparation of the organic porous carrier in Example 3 is the same as that in Example 2, except that the porogen is used in a different dosage, and the preparation steps are the same as the dosage of other reagents. In Example 3, 7ml DNBP is 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 method for preparing a terpolymer used as a support for an olefin polymerization catalyst. Background technique [0002] At present, most commercial olefin polymerization catalysts use supported catalysts, and the catalysts usually use inorganic substances to support the catalyst. US patents US4,808,561, US5,026,797, US5,763,543, US5,661,098, US6,455,647, US4540679, China Patent CN98126385, CN1174549, CN1356343 report the preparation of supported Ziegler-Natta and metallocene catalysts with inorganic substances such as magnesium chloride, silica, alumina, magnesium carbonate, etc. as carriers, but the introduction of these inorganic carriers into polymers will affect the performance of polyolefins . In recent years, due to the unique properties of organic polymer carriers containing porous structures, such as high activity and good copolymerization properties, especially the low inorganic ash content of the prepared polymer produ...

Claims

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Application Information

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Patent Type & Authority Patents(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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