Metallocene catalyst composition and preparation method thereof

A metallocene catalyst and metallocene compound technology, which is applied in the field of olefin polymerization catalysts, can solve the problems of agglomeration, unfavorable catalyst transportation, decreased fluidity, etc., and achieves high catalyst activity, reduces the possibility of carrier aggregation, and improves the effect of morphology.

Active Publication Date: 2016-06-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the cocatalysts and metallocene compounds loaded on the carrier are organic substances, the fluidity of the supported catalyst relative to the carrier itself decreases, and small agglomerates are

Method used

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  • Metallocene catalyst composition and preparation method thereof
  • Metallocene catalyst composition and preparation method thereof
  • Metallocene catalyst composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] (1) Preparation of a carrier loaded with alkyl aluminoxane

[0058] Under nitrogen protection, add 5.0 g of methylalumoxane and 20 mL of toluene to a reaction flask with mechanical stirring, stir to dissolve and keep the temperature at 100 ° C; at the same time, add the above-mentioned treated carrier silica gel 5.0 to another reaction flask g, keep stirring, gradually add silica gel into the methyl aluminoxane solution, rinse the residual silica gel with 20ml of toluene, then continue stirring at constant temperature for 3 hours, finally wash with toluene at 100°C, filter, and dry to obtain the loaded methyl Silica gel support for aluminoxane.

[0059] (2) Preparation of supported metallocene catalyst components

[0060] Under the protection of nitrogen, weigh 100 mg of dimethyl silicon bridged bis(2-methyl-4-phenyl-indenyl) zirconium dichloride and suspend it in 15 mL of n-hexane to make a slurry, keep the temperature to 50 ° C, and then The aforementioned silica ca...

Embodiment 2

[0066] (1) Preparation of a carrier loaded with alkyl aluminoxane

[0067] Under nitrogen protection, add 2.5g of methylaluminoxane and 20mL of toluene to a reaction flask with mechanical stirring, stir to dissolve and keep the temperature at 100°C; at the same time, add the above-mentioned treated carrier silica gel 4.9 to another reaction flask g, keep stirring, gradually add silica gel into the methyl aluminoxane solution, rinse the residual silica gel with 20ml of toluene, then continue stirring at constant temperature for 3 hours, finally wash with toluene at 100°C, filter, and dry to obtain the loaded methyl Silica gel support for aluminoxane.

[0068] (2) Preparation of supported metallocene catalyst components

[0069] Under the protection of nitrogen, weigh 35 mg of dimethylsilyl bridged bis(2-methyl-4-phenyl-indenyl) zirconium dichloride and add it to a reaction flask with mechanical stirring, add 15 mL of n-pentane and stir A slurry was made, and the temperature w...

Embodiment 3

[0075] (1) Preparation of a carrier loaded with alkyl aluminoxane

[0076] Under nitrogen protection, add 4.5 g of methylalumoxane and 20 mL of toluene to a reaction flask with mechanical stirring, stir to dissolve and keep the temperature at 80 ° C; at the same time, add the above-mentioned treated carrier silica gel 5.0 to another reaction flask g, keep stirring, gradually add silica gel to the methylaluminoxane solution, rinse the residual silica gel with 20ml of toluene, then continue to stir at constant temperature for 3 hours, finally wash and filter with toluene at 80°C to obtain the loaded methylaluminoxane alkane silica gel support.

[0077] (2) Preparation of supported metallocene catalyst components

[0078] Under the protection of nitrogen, weigh 110 mg of dimethyl silicon bridged diindenyl zirconium dichloride and add it into a reaction bottle with mechanical stirring, add 15 mL of n-hexane and stir to make a slurry, and at 50 ° C, the above-mentioned undried Th...

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Abstract

The invention relates to a metallocene catalyst composition. The catalyst composition contains a polymer, and alkylaluminoxane and a metallocene compound supported metallocene catalyst component which are supported on a carrier, wherein a weight ratio of the polymer to the supported metallocene catalyst component is 0.1-10:1, and the alkylaluminoxane loading rate and the metallocene compound loading rate are respectively greater than 70wt%. The catalyst can be used for homopolymerization and copolymerization reactions of olefin, the olefin polymerization reaction catalysis activity is high, and a polymer prepared in the invention has good form and few fine powders and is not sticky to kettles. The invention also relates to a preparation method of the metallocene catalyst composition. The method has the advantages of simple process, short production period, efficient preparation of metallocene catalysts under mild reaction conditions, small loss of alkylaluminoxane in the loading process, and production cost reduction.

Description

technical field [0001] The invention belongs to the technical field of olefin polymerization catalysts, and relates to a metallocene catalyst composition and a preparation method thereof. Background technique [0002] The use of metallocene compounds as olefin polymerization catalysts has many advantages, such as uniform distribution of comonomers, low soluble content, and good transparency in the prepared olefin polymers. However, the direct use of such metallocene compounds in olefin polymerization catalysts requires reaction in a homogeneous system, resulting in poor morphology of the prepared polymers, severe sticking of the reactants, and difficulty in handling the reaction products. These problems limit the use of metallocene catalysts in the industry. on the application. [0003] The way to solve the above problems is to load the metallocene catalyst on an inert porous particle carrier, and common carriers include silica gel, magnesium chloride, clay, etc. At presen...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F110/06C08F4/6592C08F4/02
Inventor 范国强胡青郑刚
Owner CHINA PETROLEUM & CHEM CORP
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