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Method for preparing terpolymer for carrier of olefin polymerization catalyst

A carrier and monomer technology, which is applied in the field of terpolymer preparation, can solve the problems of uncontrollable particle specific surface area and average pore size, unfavorable metallocene catalyst loading, and small particle size of polymer particles, so as 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

[0018] Preparation of organic porous carrier:

[0019] Treatment of reactive monomers: styrene and divinylbenzene are removed with 10% NaOH solution before use, and then washed with deionized water for 3 times before use. Hydroxyethyl methacrylate is chromatographed using neutral alumina The column was used after removing the polymerization inhibitor. Unless otherwise specified below, the reactive monomers are all used after pretreatment.

[0020] In a 250ml glass reactor, add 120ml ethanol and 12ml deionized water, then add 4ml (about 3.8g) styrene and 4ml hydroxyethyl methacrylate (about 4.0g), stir at room temperature for 5min, then add 2% Polyvinyl alcohol (polymerization degree: 1750) in monomer mass, stirred at 45°C for 1 hour, dissolved the polyvinyl alcohol stabilizer, then added 10ml DNBP, and 1.5% monomer mass of AIBN, raised the temperature to 50°C, and reacted 2 hour, then add 4ml (about 3.9g) of divinylbenzene, rise to 70°C, react for 3 hours, and then age at 80...

Embodiment 2

[0022] Preparation of organic porous support: In a 250ml glass reactor, add 108ml of ethanol and 12ml of deionized water, then add 3ml (about 2.7g) of styrene and 2ml of hydroxyethyl methacrylate (about 2.0g). Stir at room temperature for 5 minutes, then add 2% polyvinyl alcohol (polymerization degree: 1750) of the monomer mass, and stir for 1 hour at 45°C to dissolve the polyvinyl alcohol stabilizer, then add 4ml DNBP, and 1.5% monomer mass AIBN, reacted at 50°C for 1 hour, added 3ml of 55% (about 2.8g) divinylbenzene, raised the temperature to 70°C, reacted for 3 hours, then raised the temperature to 80°C, reacted for 5 hours, and the stirring speed was 600 rpm minutes, washed 3 times with ethanol, and dried to obtain a porous organic carrier.

Embodiment 3

[0024] 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 prepared by polymerizing divinyl benzene, styrene and hydroxyethyl methylacrylate. The carrier is prepared by a dispersion polymerization method, styrene and hydroxyethyl methylacrylate monomers are firstly added to react, the particle shape of the terpolymer carrier is controlled by adding a stabilizing agent, the pore diameter of the terpolymer carrier is adjusted by adding a pore-foaming agent, and divinyl benzene is finally added to polymerize. 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, good copolymerization performance, especially the prepared polymer products have low inorganic ash content, etc.), they are increasingly being favored by industry and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/02C08F10/00C08F212/08C08F220/28C08F212/36C08F2/00C08J9/28
Inventor 王雄韩晓昱徐人威朱博超贾军纪姚培洪刘义任峰郝萍吴江葛汉青许云波姜飞姜健
Owner PETROCHINA CO LTD
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