Catalyst component and catalyst for olefin polymerization

A technology for olefin polymerization and solid catalyst, which is applied in the field of catalyst components and catalysts, and can solve the problems of difficult industrial application of synthesis processes, low catalyst activity, and low catalytic activity.

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In industrial production, each of these internal electron donors has certain defects in practical applications: for example, the catalytic activity of catalysts using aromatic diester compounds is lower than that of diether compounds; catalysts using diether compounds Although the catalytic activity is high and has good hydrogen tuning sensitivity, the relative molecular mass distribution of the resulting polymer is narrow; although the succinate ester compound of 2,3-dihydrocarbyl has a wide relative molecular mass distribution, there is this inner molecular mass distribution. Problems such as difficulties in the industrial application of the electron donor compound synthesis proce

Method used

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  • Catalyst component and catalyst for olefin polymerization
  • Catalyst component and catalyst for olefin polymerization
  • Catalyst component and catalyst for olefin polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] (1) Preparation of catalyst solid components

[0069] In the high-purity N 2 In the fully replaced glass bottle, add 5.0 g of anhydrous MgCl successively 2 , 140ml of toluene, 8.0ml of epichlorohydrin, and 10.0ml of tributyl phosphate are completely dissolved at 60°C, and 1.4 grams of phthalic anhydride are added respectively, as described in the patent application specification of China Invention Patent Application No. 200910077779.6 Prepare 5mmol of 2,3-diisopropyl-2-cyanodiethyl succinate, cool the solution to -25°C, then drop 50ml of titanium tetrachloride into it, at -25°C Stir for half an hour, add 3.0 g of silica gel (Davison XPO2485, dry at 600°C for 4 hours before using the silica gel), and then slowly raise the temperature to 90°C to obtain a solid precipitate. After filtering, add 70ml of toluene, wash twice, and separate solid. Then use 60ml of toluene and 40ml of titanium tetrachloride to heat up to 100°C for two hours, filter and wash with toluene and h...

Embodiment 2

[0083] (1) The preparation of the solid component of the catalyst is the same as in Example 1, except that 2.5 mmol of diisobutyl phthalate and 2.5 mmol of 2,3-diisopropyl-2-cyanodiethyl succinate are added successively. mmol, instead of diethyl 2,3-diisopropyl-2-cyanosuccinate (5 mmol) added alone.

[0084] (2) The propylene polymerization method is the same as that of Example 1, and the test results are shown in Table 1.

[0085] The performance of table 1 catalyst

[0086]

[0087] It can be seen from the data in the table that the performance of the catalyst is excellent, not only the activity for propylene polymerization is equivalent to that of the existing catalyst containing internal electron donors of diisobutyl phthalate, but also the polymer has good isotacticity and high weight-average molecular weight , a wider molecular weight distribution.

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Abstract

The invention relates to a catalyst component and a catalyst for olefin polymerization and application of the catalyst to olefin homopolymerization and copolymerization. In the invention, an alpha-cyano ester succinate compound containing a specific structure is used as an internal electron donor, a magnesium chloride and silicon dioxide composite carrier is used, and the technical means are matched with each other for use, so that the polymerization activity of the catalyst is also kept while the grain form of the catalyst is improved. The catalyst is used for propylene polymerization; a polymerization product has a high isotactic index and high weight-average molecular weight; and polypropylene with wide molecular weight distribution is obtained. Compared with the conventional 2,3-dialkyl ester succinate compound, the alpha-cyano ester succinate compound has the advantages of high easiness in preparation and high contribution to industrial production.

Description

technical field [0001] The present invention relates to a catalyst component and catalyst for olefin polymerization, and its application in olefin homopolymerization and copolymerization. Background technique [0002] In this field, it is well known that Ziegler-Natta catalyst consists of at least two parts: the active component containing transition metal, also known as the main catalyst, and the transition metal compounds with more practical applications are titanium and vanadium, generally together with carrier magnesium chloride A solid catalyst component is formed; and a metal organic compound containing elements of group 1A to IIIA of the periodic system, also known as a co-catalyst, is mainly an aluminum alkyl or a halide of an aluminum alkyl. In some cases, especially when it is used for propylene polymerization catalysis, a third component is often added to control the isotacticity of the product and improve the polymerization activity. These are usually Lewis base...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/02C08F10/06
Inventor 谢伦嘉凌永泰田宇冯再兴赵思源胡青亢宇
Owner CHINA PETROLEUM & CHEM CORP
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