Olefin polymerization catalyst, and preparation method and application thereof

A technology of olefin polymerization and catalyst, which is applied in the field of olefin polymerization catalyst and its preparation, which can solve the problems of poor particle shape, high apparent density, and rareness, and achieve the effect of low content and improved particle shape

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this 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 particle shape is not very good
[0004] CN1453298A discloses a class of glycol ester compounds containing special structures as electron donors. The use of such electron donors can not only improve the activity of the catalyst, but also significantly broaden the molecular weight distribution of the resulting propylene polymer. The synthesis and purification process of the compound is complicated, which makes the catalyst production cost higher
[0005] At present, there are few reports on the application of organic alcohol ethers in Z-N catalysts, especially for improving catalyst activity and hydrogen tuning performance.

Method used

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  • Olefin polymerization catalyst, and preparation method and application thereof
  • Olefin polymerization catalyst, and preparation method and application thereof
  • Olefin polymerization catalyst, and preparation method and application thereof

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 0.5 milliliters of ethylene glycol monoethyl ether were added successively. Under the condition of 60°C, react for 1 hour, add 1.4 g of phthalic anhydride and 30 ml of toluene, continue the reaction for one hour, cool to -28°C, add 56 ml of titanium tetrachloride dropwise (dropping speed 1 ml / min ), gradually raised the temperature to 85°C (the heating rate was 5°C / min), added 1.1 ml of di-n-butyl phthalate (DNBP) at 80°C, kept the temperature for one hour, filtered, washed the solid with toluene twice, and then Add 48 ml of titanium tetrachloride and 72 ml of toluene, filter at 110° C. for 0.5 hour, repeat this step twice, wash the obtained solid with hexane for 5 times, and dry it in vacuum to obtain an olefin polymerization catalyst.

Embodiment 2

[0054] The preparation method was consistent with that of Example 1, except that the amount of ethylene glycol monoethyl ether was 1.0 mL.

Embodiment 3

[0056] The preparation method was consistent with that of Example 1, except that the amount of ethylene glycol monoethyl ether was 0.3 mL.

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Abstract

The invention discloses an olefin polymerization catalyst. The catalyst comprises a magnesium compound, an organic alcohol ether compound, an organophosphorus compound, an organic epoxy compound, a precipitation aid, an internal electron donor and a titanium compound. The catalyst has the advantages of high activity in olefin polymerization reactions, good hydrogen sensitivity, granule shape improvement and few polymer fine powder.

Description

technical field [0001] The invention relates to a catalyst for olefin polymerization and its preparation method and application, in particular to a catalyst for olefin polymerization modified by an organic alcohol ether compound and its preparation method and application. 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, and the apparent density is low, which increases difficulties for 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-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F10/00C08F4/649C08F4/654C08F4/651
Inventor 洪挺郭正阳雷世龙任春红王迎刘萃莲王宇付梅艳
Owner CHINA PETROLEUM & CHEM CORP
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