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A kind of preparation method of modified porous organic carrier

An organic carrier and porosity technology, applied in the field of preparation of modified organic carriers, can solve the problems of large particle size and distribution, and achieve the effects of uniform particle size, simple preparation method and narrow dispersion.

Active Publication Date: 2018-01-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size and distribution of the particles prepared by the suspension polymerization method are large, and the particle size can reach more than 200 μm. Usually, the prepared carrier needs to screen out the particles of 30-100 μm before loading the olefin polymerization catalyst.

Method used

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  • A kind of preparation method of modified porous organic carrier
  • A kind of preparation method of modified porous organic carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Comonomer treatment: Use 10% NaOH solution to remove the polymerization inhibitor before using divinylbenzene, and then wash it with deionized water for 3 times before use; use hydroxyethyl methacrylate, hydroxypropyl methacrylate, etc. Use the neutral alumina chromatographic column after removing the polymerization inhibitor. The comonomers in the following examples are used after treatment without special instructions.

[0024] Preparation of functional organic porous carrier: In a 250ml glass reactor, add 108ml ethanol and 12ml deionized water, then add 3.9g divinylbenzene (Aladdin reagent, 55%) and 2.5g hydroxyethyl methacrylate for polymerization Monomer, stirred at room temperature for 5min, then added 5% of monomer mass of nano-titanium dioxide particles (Aladdin's reagent, 99.8%, 100nm, anatase, hydrophilic), and 2% of monomer mass of polyvinyl alcohol (polymerization degree 1788) at 50°C, stirred for 1 hour, dissolved the polyvinyl alcohol stabilizer, then add...

Embodiment 2

[0026]Preparation of functional organic porous carrier: in a 250ml glass reactor, add 126ml ethanol and 14ml deionized water, then add 4.8g divinylbenzene (Aladdin reagent, 55%) and 3.2g hydroxyethyl methacrylate ( 98%) polymerized monomers, stirred at normal temperature for 5min, then added 3% of the monomer mass of titanium dioxide particles (Aladdin's reagent, 99.8%, 100nm, anatase, hydrophilic), and 2% of the monomer mass of polyethylene Alcohol (polymerization degree: 1788) was stirred at 50°C for 1 hour to dissolve the polyvinyl alcohol stabilizer, then add 2% monomer mass of AIBN, raise the temperature to 70°C, react for 3 hours, then raise the temperature to 80°C, After reacting for 5 hours, the stirring speed was 360 rpm, washed twice with ethanol, then washed three times with hexane, and dried to obtain 4.5 g of porous TiO 2 / P(DVB-co-HEMA) modified carrier A2.

Embodiment 3

[0028] The preparation of the organic porous carrier in Example 3 is the same as in Example 2 except that the titanium dioxide particles are different, the preparation steps and the dosage of other reagents are the same, and 3% titanium dioxide (Aladdin's reagent, 99.8%, 0.2-0.4 μm) is added in Example 3. Prepared 4.6g porous TiO 2 / P(DVB-co-HEMA) modified carrier A3.

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Abstract

The invention relates to a preparation method of modified copolymer of divinyl benzene and hydroxyalkyl methacrylate. The preparation method is characterized in that nano titanium dioxide particles are added into a copolymerization system of divinyl benzene and hydroxyalkyl methacrylate, the particle size of the nano titanium dioxide particles is in a range of 0.01 to 10 [mu]m, the weight ratio of added titanium dioxide particles to total monomers is 0.5-10:100; and a third copolymerization monomer can be added to prepare a polybasic copolymer. The modified copolymer can be used as the carrier of a catalyst for olefin polymerization; the distribution of the particle size of the carrier is narrow; and the specific surface area and particle morphology of the carrier particles can be modulated by the addition amount of titanium dioxide. The yield of solid particles prepared from copolymerization monomers is improved by the addition of hydrophilic titanium dioxide, and the obtained copolymer has good particle morphology.

Description

technical field [0001] The invention relates to a method for preparing an olefin polymerization catalyst carrier, in particular to a method for preparing a modified organic carrier. Background technique [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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/36C08F220/28C08F212/08C08F2/44C08K3/22C08J9/28C08F10/00C08F4/02
Inventor 王雄许云波马艳萍韩晓昱贾慧青刘义陈旭穆蕊娟樊洁刘小燕王涛王春龙笪敏峰白虹姜健
Owner PETROCHINA CO LTD
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