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Application of catalyst component in olefin polymerization

A technology of olefin polymerization and catalyst, which is applied in the field of catalysis in olefin polymerization in a high temperature state, and can solve problems such as high temperature polymerization activity and polymer isotacticity need to be further improved, and polymerization process is complicated

Active Publication Date: 2015-06-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst mainly realizes the high-temperature polymerization of propylene by introducing a mixture of aluminoxane and alkylaluminum as a cocatalyst during the polymerization process, so the polymerization process is complicated, and its high-temperature polymerization activity and polymer isotacticity need to be further improved
[0006] Chinese patent CN1621421A also discloses a method for preparing a catalyst. This catalyst also realizes the high-temperature polymerization of propylene by introducing a mixture of aluminoxane and alkylaluminum as a cocatalyst during the polymerization process. Therefore, the polymerization process is also complicated and new catalysts need to be introduced The problem of components, and high temperature polymerization activity and polymer isotacticity need to be further improved

Method used

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  • Application of catalyst component in olefin polymerization
  • Application of catalyst component in olefin polymerization
  • Application of catalyst component in olefin polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Preparation of solid component a1:

[0070] Take 10 grams of the alkoxymagnesium carrier prepared in the preliminary example, 50 mL of toluene, and 2.5 mL of di-n-butyl phthalate to prepare a suspension; 40mL and 60mL of titanium tetrachloride, then add the prepared suspension into the kettle, raise the temperature to 80°C, keep the temperature for 1 hour, then continue to raise the temperature to 115°C, and press filter the liquid (mother liquor) after keeping the temperature for 2 hours. Then add 120mL of toluene and 30mL of titanium tetrachloride to the mixed solution and raise the temperature to 110°C and stir for 1 hour (titanium treatment). This is done 3 times, and the liquid is filtered off. The obtained solid is washed 4 times with 120mL of n-hexane at 50°C. Remove the liquid and dry to obtain the solid component a1 of the present invention. The titanium content in the obtained solid component a1 was 2.4 wt%.

[0071] Preparation of olefin polymerization cata...

Embodiment 2

[0079] The preparation method of solid component a1 and olefin polymerization catalyst component A1 is the same as in Example 1; according to the polymerization method of Example 1, only the polymerization temperature is changed from 95°C to 110°C for polymerization.

Embodiment 3

[0081] The preparation method of solid component a1 and olefin polymerization catalyst component A1 is the same as in Example 1; according to the preparation method of polyolefin in Example 1, only the external electron donor cyclohexylmethyldimethoxysilane (CHMMS) is replaced by Diisobutyldimethoxysilane (DIBMS) for polymerization.

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Abstract

The invention provides an application of a catalyst component A in olefin polymerization, the catalyst component is obtained by contacting a solid component a containing magnesium, titanium, halogen and an internal donor component with an organosilicon compound b containing a Si-H functional group; the magnesium in the solid component a comes from a raw material alkoxy magnesium, and the temperature of the Catalytic olefin polymerization performed by the catalyst component A is 80-130 DEG C. The prepared olefin polymerization catalyst component and the olefin polymerization catalyst have high polymerization activity during high temperature polymerization and good high-degree stereospecific capacity, the obtained polymer has high stacking density and high melt index (the catalyst has good hydrogen regulating sensitivity), and the application of the invention has good industrial application value. HsiR<1>nR<2>3-n.

Description

technical field [0001] The invention relates to the application of a catalyst component in olefin polymerization, especially its catalytic application in olefin polymerization in a high temperature state. Background technique [0002] Increasing the temperature of olefin polymerization can make the Ziggler-Natta catalyst more sensitive to molecular weight regulator hydrogen, which is very beneficial to the production of polypropylene products with high melt index. At the same time, with the increase of the polymerization reaction temperature, the stereoregularity of the produced polypropylene is further improved, which is very beneficial to the production of high rigidity propylene homopolymer products and high rigidity-toughness balance performance propylene copolymer products. Therefore, the quality of polypropylene products can be improved by increasing the polymerization reaction temperature, such as the polymerization method described in patent CN1939938, which can achi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/646C08F4/656
Inventor 周奇龙谭忠徐秀东严立安宋维玮李凤奎于金华尹姗姗张锐
Owner CHINA PETROLEUM & CHEM CORP