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Catalyst, preparation method and application for ethylene polymerization

An ethylene polymerization and catalyst technology, applied in the application field of olefin polymerization, can solve the problems of poor particle shape and distribution, low polymer apparent density, etc., and achieve the effect of good hydrogen adjustment sensitivity and high activity

Active Publication Date: 2011-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the catalyst uses alcohols and alkane solvents with large polar differences to dissolve the magnesium halide, the magnesium halide cannot be completely dissolved to form a homogeneous solution, but only a fine colloidal suspension or a swollen halogenated halide. Magnesium slurry
This brings some disadvantages related to the layered crystallization characteristics of magnesium halide to the prepared catalyst, such as: the prepared polymer has low apparent density, poor particle shape and distribution, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: After high-purity N 2 In the fully replaced reactor, add 4.0g of anhydrous MgCl successively 2 , 50mL toluene, 2.0mL epichlorohydrin, 3.0mL tributyl phosphate, heat up to 50°C with stirring, and maintain it for 15 minutes, add 6.0mL ethanol, continue the reaction for 15 minutes, and cool the solution to -5~0°C , then drop 30mL of titanium tetrachloride into it, then add 5ml of a mixture of tellurium tetrachloride and ethanol to raise the temperature of the solution to 80°C, filter, wash with hexane four times, and dry in vacuum to obtain a solid catalyst.

[0038] A mixed solution of tellurium tetrachloride and ethanol was prepared by adding 1.56 g of tellurium tetrachloride to 8ML ethanol, stirring at 0°C for 2 hours, stopping the stirring, and standing at room temperature for use.

Embodiment 2

[0039] Embodiment 2 is the same as embodiment 1, only change the mixed solution of adding tellurium tetrachloride and ethanol into 3ML.

Embodiment 3

[0040] Example 3 is the same as Example 1, except that the mixed solution of tellurium tetrachloride and ethanol is changed to 1ML. And the mixture of tellurium tetrachloride and ethanol was prepared by adding 3 grams of tellurium tetrachloride into 3ML ethanol, stirring at 0° C. for 2 hours, stopping the stirring, and standing at room temperature for use.

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PUM

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Abstract

The invention relates to a catalyst used for vinyl polymerization. In the invention, a tellurium compound is added in a synthesis process of the catalyst. A solid catalyst compound can be obtained by using the solid catalyst compound prepared by the method without adding a separation assistant. The catalyst has the characteristics of high activity and hydrogen regulation sensitivity.

Description

technical field [0001] The present invention relates to a catalyst component for ethylene polymerization, its preparation method, and its application in olefin polymerization. Background technique [0002] The traditional Z-N catalyst started from the classic titanium-aluminum catalyst, and has progressed to the stage of being activated by compounds such as magnesium chloride and modified by various other organic compounds; and has developed from simply improving the catalytic activity to improving polymer products by adjusting the catalyst performance. [0003] Since the 1970s, companies such as Mitsui Petrochemical Industry Co., Ltd. of Japan have successfully developed a variety of Ti-Mg high-efficiency carrier catalysts with magnesium chloride as the carrier, which has enabled the rapid development of the world's slurry production of polyolefin industry. [0004] In the method of ethylene polymerization and copolymerization disclosed in Japanese Patent JP49-51378, the c...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/649C08F4/648C08F4/654C08F4/651
Inventor 孙怡菁马冬黄庭杰王丽莎
Owner CHINA PETROLEUM & CHEM CORP
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