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Electron donor catalyst and preparation and application

A technology of electron donors and catalysts, applied in the field of catalysts, can solve the problems of low copolymerization ability of comonomers

Active Publication Date: 2010-11-17
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

We (application number: 200910083230.8) found that after the traditional high-efficiency Ziegler-Natta catalyst is modified with alcohol, the catalyst can effectively catalyze the copolymerization of ethylene and higher Alpha-olefins, but the use of this modified high-efficiency Ziegler-Natta catalyst catalyzes ethylene / When olefins with large steric hindrance are copolymerized, the copolymerization ability of the comonomer is low

Method used

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  • Electron donor catalyst and preparation and application

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Experimental program
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Effect test

Embodiment 1

[0037] 1) Prepare the main catalyst: In the reactor fully replaced by nitrogen, add 4g of magnesium dichloride, 3.5ml of epichlorohydrin, 5.5ml of tributyl phosphate, 75ml of toluene, 10ml of hexane, and 3.2ml of ethanol in sequence, and stir Raise the temperature to 70°C, after the solid is completely dissolved to form a uniform solution, keep the temperature for 1 hour; then cool down to -25°C, add 58ml of titanium tetrachloride dropwise, and add 0.5g of trimethylsilyl tert-butylamine after the dropwise addition, 3.5 ml of triethoxyisopropoxysilane, after 1 hour of reaction, keep the temperature at -10°C for 1 hour, 0°C for 1 hour, and 20°C for 1 hour, add 5ml of hexane, raise the temperature to 60°C, add 10ml of hexane, and react 2h, stop stirring, let the suspension stand, separate layers, extract the supernatant, wash twice with toluene, wash twice with hexane, and blow dry with nitrogen to obtain a main catalyst component with good fluidity and narrow particle size distri...

Embodiment 2

[0040] 1) Prepare the main catalyst: In the reactor fully replaced by nitrogen, add 4g of magnesium dichloride, 7.5ml of epichlorohydrin, 10.5ml of tributyl phosphate, 75ml of toluene, 8ml of hexane, and 6.2ml of ethanol in sequence, and stir Raise the temperature to 60°C, after the solid is completely dissolved to form a uniform solution, keep the temperature for 1 hour; then cool down to -25°C, add 40ml of titanium tetrachloride dropwise, and add 1.5g of triethylsilyl isobutylamine, 2g Tetraethoxysilane, after reacting for 1 hour, heat up to 60°C, 3ml of hexane, react for 2 hours, stop stirring, let the suspension stand, separate layers, extract the supernatant, wash twice with toluene, and wash twice with hexane , blown dry with nitrogen to obtain a main catalyst component with good fluidity and narrow particle size distribution;

[0041] 2) Copolymerization of ethylene: After a 0.5-liter stainless steel autoclave was fully replaced with nitrogen, 20 mg of the main catalyst...

Embodiment 3

[0043] 1) Prepare the main catalyst: In the reactor fully replaced by nitrogen, add 3g of magnesium dichloride, 5ml of epichlorohydrin, 10.5ml of tributyl phosphate, 75ml of toluene, 5.2ml of ethanol, and 3ml of hexane in turn, and heat up under stirring After the solid is completely dissolved to form a uniform solution at 60°C, keep the temperature constant for 1 hour; then cool down to -25°C, add 50ml of titanium tetrachloride dropwise, and add 2.5g of trinonylsilyl-2,6-dimethyl Aniline, 3g of diethoxyisopropoxy tert-butylsilane, after reacting for 1h, keep the temperature at -10°C for 1h, 0°C for 1h, 20°C for 1h, heat up to 60°C for 2h, stop stirring, Stand the suspension, separate layers, extract the supernatant, wash twice with toluene, wash twice with hexane, and blow dry with nitrogen to obtain a main catalyst component with good fluidity and narrow particle size distribution;

[0044] 2) Copolymerization of ethylene: After a 0.5-liter stainless steel autoclave was full...

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Abstract

The invention relates to an electron donor catalyst and preparation and application thereof. A main catalyst consists of carrier, transition metal halide, organic alcohol compound, organic siloxane and organic silicon amine in a molar ratio of 1: (0.01-20): (0.1-6): (0.01-5): (0.01-5); a co-catalyst is an organic aluminum compound; and the molar ratio of the transition metal halide in the main catalyst to the co-catalyst is 1: (30-500). The catalyst has the advantages of high catalytic activity, high polymer molecular weight, wide polymer molecular weight distribution, good copolymerization property of copolymerization monomers, suitability for a slurry packing method, a gas-phase polymerization process or a combined polymerization process, simple preparation method, low equipment requirement and low environmental pollution.

Description

technical field [0001] The invention relates to a catalyst for ethylene polymerization or propylene polymerization or copolymerization and the preparation and application of the catalyst. Background technique [0002] Olefin polymerization catalysts are the core of polyolefin polymerization technology. From the perspective of the development of olefin polymerization catalysts, there are two main aspects: (1) the development of polyolefin resin catalysts that can prepare special or better performance, such as metallocene catalysts (2) For the production of general-purpose polyolefin resins, on the basis of further improving catalyst performance, simplify the catalyst preparation process, reduce catalyst costs, and develop environmentally friendly technologies to improve efficiency ,Increase competitiveness. Before the 1980s, the focus of polyethylene catalyst research was on the pursuit of catalyst efficiency. After nearly 30 years of hard work, the catalytic efficiency of p...

Claims

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Application Information

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IPC IPC(8): C08F210/16C08F210/02C08F110/02C08F4/646C08F4/654C08F4/656C08F4/6592C08F4/52C08F4/68
Inventor 张明革黄启谷义建军刘宏吉曹晶磊李志飞朱百春池亮于现建冯雯婷刘伟娇余颖昊
Owner PETROCHINA CO LTD
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