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Preparation method of organic vehicle olefin polymerization catalyst

A technology of olefin polymerization and organic carrier, which is applied in the field of organic carrier preparation, can solve the problems of large particle size and distribution, and achieve the effects of uniform particle size, easy filtration, and increased yield

Active Publication Date: 2015-04-22
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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  • Preparation method of organic vehicle olefin polymerization catalyst
  • Preparation method of organic vehicle olefin polymerization catalyst
  • Preparation method of organic vehicle olefin polymerization catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment provides a method for preparing an organic carrier for an olefin polymerization catalyst, comprising the following steps:

[0036] In a 250mL glass reactor, add 108mL ethanol and 12mL deionized water;

[0037] Add 3.8g divinylbenzene (55wt%) and 2.4g hydroxyethyl methacrylate reaction monomer, stir at room temperature for 5min;

[0038] Add iron ferric oxide nanoparticles (particle size: 20nm) accounting for 5% of the total mass of the reaction monomers and polyvinyl alcohol (the degree of polymerization is 1788) accounting for 2% of the total mass of the reaction monomers, and stir for 1 hour at 50° C. Vinyl alcohol stabilizer dissolved;

[0039] Add AIBN accounting for 2% of the total mass of the reaction monomer, raise the temperature to 70°C, react for 3 hours, raise the temperature to 80°C, and react for 5 hours, the stirring speed is 360 rpm, using ethanol / water (1:1) Mixed solvent washes 3 times, uses 400 order 316 stainless steel filter net multi...

Embodiment 2

[0042] This embodiment provides a method for preparing an organic carrier for an olefin polymerization catalyst, comprising the following steps:

[0043] In a 250mL glass reactor, add 126mL ethanol and 14mL deionized water;

[0044] Add 4.6g divinylbenzene (55wt%) and 3.1g hydroxyethyl methacrylate (98wt%) reaction monomer, and stir at room temperature for 5min;

[0045] Add iron ferric oxide nanoparticles (20nm in particle size) accounting for 3% of the total mass of the reaction monomers and polyvinyl alcohol (1788 degree of polymerization) accounting for 2% of the total mass of the reaction monomers, stir at 50° C. for 1 h, and polymerize Vinyl alcohol stabilizer dissolved;

[0046] Add AIBN accounting for 2% of the total mass of the reaction monomer, raise the temperature to 70°C, react for 3 hours, then raise the temperature to 80°C, react for 5 hours, stir at 360 rpm, wash 3 times with ethanol, and dry 5.0 g of gray porous organic carrier A2-1 containing ferric oxide w...

Embodiment 3

[0049] This embodiment provides a method for preparing an organic carrier for an olefin polymerization catalyst, the steps of which are basically the same as those in Example 2, except that the amount of ferric iron tetroxide nanoparticles becomes 1.5% of the total mass of the reaction monomers, 4.0 g of porous organic carrier containing ferric oxide was prepared as A3-1.

[0050] Take 2.8g of the dried A3-1 carrier, use 20mL of 36.5% concentrated hydrochloric acid and 100mL of alcohol / water system acid solvent (mass ratio 1:1), wash at 70°C for 2h, the solution turns from gray black to yellow, filter Finally, wash 0.5h with a small amount of above-mentioned acid solvent, then wash 3 times with the solvent of alcohol / water (mass ratio 1:1) system, obtain 2.4g white porous P (DVB-co-HEMA) organic carrier A3 after filtering and drying -2.

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Abstract

The invention relates to a preparation method of an organic vehicle olefin polymerization catalyst. The preparation method of the organic vehicle olefin polymerization catalyst comprises the following steps: mixing alcohol with water, thus obtaining a dispersion liquid; adding a reactive monomer into the dispersion liquid, thus obtaining mixed solution; adding a stabilizer, metal oxide particles and a free radical initiator into the mixed solution, heating to 60-85 DEG C, stirring while reacting for 3-12 hours to obtain a reaction product, washing the obtained reaction product, and drying, thus obtaining a copolymer containing metallic oxide, wherein metal in the metal oxide is one or combination of more than one of metal ions in families VIII, IB, IIB and IIA; and removing metallic oxide in the copolymer containing metallic oxide, washing and drying, thus obtaining the organic vehicle olefin polymerization catalyst. The preparation method of the organic vehicle olefin polymerization catalyst has the advantages that the form and the specific surface area of an organic vehicle can be regulated, and thus the organic vehicle can be separated out from a system relatively easily, solid particles can be filtered out relatively easily, the yield of a reaction monomer is increased, and the organic vehicle with the narrow particle size distribution is obtained.

Description

technical field [0001] The invention relates to a method for preparing an organic carrier, in particular to a method for preparing an organic carrier for an olefin polymerization catalyst. Background technique [0002] At present, the vast majority of commercial olefin polymerization catalysts use supported catalysts, and the catalysts usually use inorganic substances to carry out catalyst loading. For example, magnesium chloride, silica, alumina, 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 academia. focus on. [0003]...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/02C08F220/28C08F212/36C08F212/08C08F212/14C08F212/12C08F2/44C08K3/22C08F2/20C08J9/28
Inventor 王雄徐人威朱博超韩晓昱贾军纪姚培洪
Owner PETROCHINA CO LTD
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