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Prepn of solid catalyst for olefin polymerization

A solid catalyst and olefin polymerization technology, which is applied in the field of preparing dialkoxymagnesium-supported solid catalysts, and can solve the problems of low polymer bulk density and the like

Active Publication Date: 2006-08-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The polyolefin catalyst with magnesium ethoxide as the carrier has many outstanding advantages (EP 1 209 172 A1, EP1 270 604 A1, EP 1 260 524 A1, EP 1 061 088 A1), such as high activity, high isotacticity, Good hydrogen adjustment performance and good regularity of polymer particles, but there are also disadvantages of low bulk density of produced polymers, for example, the bulk density of polymers obtained in EP 1 270 604 A1 is 0.42-0.44g / cm 3 between

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Basically the same as Comparative Example 1, the difference is that the temperature of the dropwise addition of titanium tetrachloride was lowered to 0° C. to obtain 9.4 g of solid catalyst, and the analyzed titanium content was 2.68 (wt)%.

[0066] Solid catalyst adopts the same polymerization evaluation with comparative example 1, obtains 42145 gram polymers, and catalyst activity is 42145 gram polypropylene / gram catalysts, and polymer bulk density is 0.45g / cm 3 .

Embodiment 2

[0068] Substantially the same as comparative example 1, the difference is that the bulk density is 0.33g / cm 3 Magnesium ethoxide instead has a bulk density of 0.27g / cm 3 Magnesium ethoxide obtained 9.5 grams of solid catalyst, and the analyzed titanium content was 2.57 (wt)%.

[0069] Solid catalyst adopts the same polymerization evaluation as comparative example 1, obtains 40237 gram polymers, and catalyst activity is 40237 gram polypropylene / gram catalysts, and polymer bulk density is 0.45g / cm 3 .

Embodiment 3

[0071] Substantially the same as comparative example 1, the difference is that the bulk density is 0.29g / cm 3 Magnesium ethoxide instead has a bulk density of 0.27g / cm 3 Magnesium ethoxide, and the temperature of the dropwise addition of titanium tetrachloride was reduced to 0° C. to obtain 8.7 grams of solid catalyst, and the analyzed titanium content was 2.43 (wt)%.

[0072] Solid catalyst adopts the same polymerization evaluation as comparative example 1, obtains 45367 gram polymers, and catalyst activity is 45367 gram polypropylene / gram catalysts, and polymer bulk density is 0.46g / cm 3 .

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Abstract

The present invention discloses preparation of solid catalyst for olefin polymerization. The preparation process has lowered contact temperature between the component A of dialkoxy magnesium compound and the component B titanium compound, and high bulk density of the component A or raised dropped amount of the component B to raise the bulk density of the polymer. The catalyst prepared through the improved process has high activity, high isotactic degree and high hydrogenation regulating performance as well as capacity of raising the bulk density of the polymer.

Description

technical field [0001] The invention relates to a method for preparing a solid catalyst in an olefin polymerization catalyst, in particular to improving the bulk density of an olefin polymer through the method for preparing a dialkoxymagnesium carrier type solid catalyst. Background technique [0002] With the continuous development of the polyolefin industry, various types of polyolefin catalysts have emerged, but the widely used high-efficiency carrier catalysts for olefin polymerization mainly use magnesium halide as a carrier and support tetravalent titanium compounds. base aluminum. [0003] For example, the application number is 98813309.1, and the title of the invention is a catalyst component comprising magnesium, titanium, halogen and an electron donor, its preparation method and use. The method includes the following steps: (i) adding an alkoxy moiety The titanium-free magnesium compound (a) is reacted with a halogen-containing compound (b) which can form an elect...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/643
Inventor 李树行兰丽华李翔羽李花路云鹏
Owner CHINA PETROLEUM & CHEM CORP
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