Catalyst for olefin polymerization or copolymerization at high temperature

A technology for olefin polymerization and copolymerization, which is applied in the field of catalysts and can solve the problems of complex catalyst preparation and poor control.

Inactive Publication Date: 2007-01-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of the catalyst i

Method used

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  • Catalyst for olefin polymerization or copolymerization at high temperature
  • Catalyst for olefin polymerization or copolymerization at high temperature
  • Catalyst for olefin polymerization or copolymerization at high temperature

Examples

Experimental program
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Embodiment 1

[0032] The preparation of catalyst component A:

[0033] In the high-purity N 2 In the fully replaced reactor, sequentially add 0.05mol anhydrous MgCl 2 , 75ml of toluene, 0.1mol of epichlorohydrin, 0.03mol of tributyl phosphate, heated to 50°C with stirring, and maintained for 2 hours, the solids were completely dissolved, added 0.008mol of phthalic anhydride, and maintained for 1 hour. The solution was cooled to -25°C, 55ml of titanium tetrachloride was added dropwise within 1 hour, and then the temperature was slowly raised to 80°C. During the heating process, solids were gradually precipitated. Add 0.0125 mol of diisobutyl phthalate, maintain at 80° C. for 1 hour, filter and wash twice with 100 ml of toluene to obtain a brownish yellow solid precipitate. Add 60ml of toluene and 40ml of titanium tetrachloride, process at 90°C for two hours, filter, repeat the above operation once more, wash with toluene once after filtration, wash with hexane four times, and dry in vacuo ...

Embodiment 2

[0039] The preparation of catalyst component A and cocatalyst MMAO: with embodiment 1.

[0040] High temperature polymerization of propylene: add 30mg of catalyst component A, catalyst component B 0.32mmol of MMAO and 0.32mmol of Et 3 Al, the CHMMS of catalyst component C 0.032mmol, all the other are with embodiment 1. 6.4 g of polypropylene was obtained with an isotacticity of 95%. The polymerization results are shown in Table 1.

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Abstract

The catalyst for olefin polymerization or copolymerization at high temperature consists of three components, including component A, component B and component C. The component A is solid prepared through dissolving magnesium chloride in organic epoxy compound or organic phosphorus compound to form solution, mixing the solution with titanium tetrahalide and separating assistant to separate soli, and treating with electron donor and titanium tetrahalide. The component B is mixture of aluminoxane and alkyl aluminum compound. The component C is organic silane. At polymerization temperature higher than 90 deg.c, the catalyst has high stereo selectivity and high activity.

Description

Technical field: [0001] The present invention relates to a catalyst for olefin polymerization or copolymerization, its preparation method and application in olefin polymerization. Background technique: [0002] At present, the propylene polymerization catalysts supporting titanium tetrachloride with magnesium chloride all adopt aluminum alkyl (Et 3 Al, etc.) are co-catalysts, and the propylene polymerization temperature is usually 65-80°C, which can obtain high activity and isotacticity, but increasing the polymerization temperature will lead to a sharp decrease in activity and isotacticity. [0003] The polymerization reaction of propylene will release a lot of heat. In industry, people have been hoping to increase the temperature of the polymerization reaction. One is to make the reaction heat easy to remove, and the other is to improve the reactivity; these can improve the efficiency of the reactor. In addition, when the polymerization temperature is higher, a polymer wi...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/654
Inventor 钟赤锋高明智毛炳权
Owner CHINA PETROLEUM & CHEM CORP
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