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Olefin polymerization catalyst, preparation method of olefin polymerization catalyst and olefin polymerization method

A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization catalyst and its preparation, and can solve the problems of high apparent density, poor sensitivity to hydrogen adjustment, low catalyst activity, etc.

Active Publication Date: 2016-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the catalyst system is used for propylene polymerization, the obtained polymer has high isotacticity and high apparent density, but the catalyst activity is not high and the sensitivity to hydrogen adjustment is poor

Method used

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  • Olefin polymerization catalyst, preparation method of olefin polymerization catalyst and olefin polymerization method
  • Olefin polymerization catalyst, preparation method of olefin polymerization catalyst and olefin polymerization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In the normal-pressure reaction kettle repeatedly replaced by high-purity nitrogen, 4.8 grams of anhydrous magnesium chloride, 70 milliliters of toluene, 4.0 milliliters of epichlorohydrin, 12.5 milliliters of tributyl phosphate and 2 milliliters of tetraethoxysilane were added successively. The reaction was carried out at 60° C. for 1 hour. Then 1.4 grams of phthalic anhydride and 30 milliliters of toluene were added to continue the reaction for one hour, then the temperature was lowered to -28° C., and 56 milliliters of titanium tetrachloride was added dropwise at a rate of 1 milliliter / min. Then, the temperature was gradually raised to 85° C. at a heating rate of 5° C. / min, 2 ml of 3-ethoxy-1-propanol was added, and the temperature was kept constant for one hour. Filter and wash the solid twice with toluene. Then add 48 milliliters of titanium tetrachloride and 72 milliliters of toluene, filter at 110° C. for 0.5 hours, repeat this step twice, and then wash the resu...

Embodiment 2

[0054] The preparation method was the same as in Example 1, except that the amount of 3-ethoxy-1-propanol was 1.0 mL. Wherein by weight, the titanium content is 1.9%, the total ester content is 8.1%, the silicon content is 0.20%, the magnesium content is 18.0%, the chlorine content is 51.1%, and the phosphorus content is 0.1%.

Embodiment 3

[0056] The preparation method is the same as in Example 1, except that the amount of 3-ethoxy-1-propanol is 3 mL. Wherein by weight, the titanium content is 2.3%, the total ester content is 12.2%, the silicon content is 0.18%, the magnesium content is 18.1%, the chlorine content is 50.0%, and the phosphorus content is 0.1%.

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Abstract

The invention relates to an olefin polymerization catalyst. The olefin polymerization catalyst is prepared from A, a magnesium compound, B, a titanium compound, C, an organophosphorus compound, D, an organic epoxy compound, E, an organosilicon compound and F, an organic alcohol ether compound. At least one of the magnesium compound and the titanium compound is a halogen-containing compound. The olefin polymerization catalyst does not contain a phthalic acid ester compound. The invention also provides a preparation method of the olefin polymerization catalyst and an olefin polymerization method using the olefin polymerization catalyst. The olefin polymerization catalyst is used for olefin polymerization and has good hydrogen regulation sensibility. A polymer prepared through the olefin polymerization catalyst contains less fine powder and has high bulk density.

Description

technical field [0001] The invention relates to an olefin polymerization catalyst, a preparation method thereof and an olefin polymerization method. Background technique [0002] Conventional methods for preparing highly active supported catalysts are generally co-grinding, grinding and impregnating, spraying carrier forming and high-speed stirring carrier forming, etc. The main disadvantage of the catalyst obtained by the grinding method is that the particle shape of the obtained catalyst is not good and the particle size distribution is wide, so the obtained polymer particle shape is not good, there are many fine powders, the apparent density is low, and it is difficult to increase the production device, and the catalytic activity is low. The directional ability is not ideal; the catalyst prepared by the spray carrier forming method and the high-speed stirring carrier forming method has greatly improved the particle shape of the catalyst, but the equipment and process of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F10/02C08F10/06C08F4/658C08F4/656C08F4/654C08F4/651C08F4/646
Inventor 洪挺郭正阳雷世龙王迎刘萃莲王宇
Owner CHINA PETROLEUM & CHEM CORP
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