Olefin polymerization catalyst and preparation method thereof

A technology for olefin polymerization and catalyst, which is applied in the field of catalyst and catalyst preparation, and can solve the problems of low copolymerization ability of comonomers and the like

Active Publication Date: 2010-12-08
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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  • Olefin polymerization catalyst and preparation method thereof

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Experimental program
Comparison scheme
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, add 0.5g of trimethylsilanol, 3.5ml of triethoxy Isopropoxysilane, after reacting for 1 hour, keep the temperature at -10°C for 1 hour, 0°C for 1 hour, and 20°C for 1 hour, add 5ml of hexane, heat up to 60°C, add 10ml of hexane, react for 2 hours, stop stirring , leave 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;

[0038] 2) Copolymerization of ethylene: After ...

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, add 0.5g of triethylsilanol, 2g of tetraethoxy Silane, after reacting for 1 hour, raise the temperature to 60°C, 3ml hexane, react for 2 hours, stop stirring, let the suspension stand, separate layers, extract the supernatant, wash twice with toluene, twice with hexane, blow dry with nitrogen , to obtain the 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 compone...

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 homogeneous solution at 60°C, keep the temperature constant for 1 hour; then cool down to -25°C, add 50ml of titanium tetrachloride dropwise, add 1.5g of trinonylsilanol, 3g of diethoxyiso Propoxy tert-butylsilane, after reacting for 1 hour, keep the temperature at -10°C for 1 hour, 0°C for 1 hour, 20°C for 1 hour, heat up to 60°C for 2 hours, stop stirring, let the suspension stand, separate layers, pump Remove 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 autocla...

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Abstract

The invention relates to an olefin polymerization catalyst and a preparation method thereof. A main catalyst consists of a carrier, a transition metal halide, an organic alcohol compound, an organo-siloxane compound and organic silanol according to a molar ratio of 1:(0.01-20):(0.1-6):(0.01-5):(0.01-5). The molar ratio of the transition metal halide in the main catalyst to a cocatalyst is 1:(30-500); the organic silanol is one or a mixture of two or more of compounds with a general formula of HO-SiR1R2R3; and the carrier is an inorganic oxide carrier, a halide carrier or a polymer carrier. The catalyst has the advantages of good spherical grain shape, high activity, high polymer molecular weight, wide distribution of polymer molecular weight, and suitability for a slurry process, gas-phase polymerization technology or combined polymerization technology; and the preparation method has the advantages of simpleness, low equipment requirement and small environmental pollution.

Description

technical field [0001] The invention relates to a catalyst for ethylene polymerization or propylene polymerization or copolymerization and a preparation method 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 polyethylene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/6592C08F4/646C08F4/68C08F4/02C08F10/02C08F10/06
Inventor 义建军黄启谷王健袁苑冯雯婷豆秀丽张利仁李志飞李红明刘志军
Owner PETROCHINA CO LTD
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