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A kind of supported polyethylene catalyst component and its preparation method and supported polyethylene catalyst and application

A technology of catalyst and polyethylene, which is applied in the field of supported polyethylene catalysts and can solve the problems of low catalytic efficiency

Active Publication Date: 2018-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to provide a new supported polyethylene catalyst component and its preparation method in order to overcome the low catalytic efficiency of the supported catalyst made of mesoporous molecular sieve material in the prior art in the process of ethylene polymerization

Method used

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  • A kind of supported polyethylene catalyst component and its preparation method and supported polyethylene catalyst and application
  • A kind of supported polyethylene catalyst component and its preparation method and supported polyethylene catalyst and application
  • A kind of supported polyethylene catalyst component and its preparation method and supported polyethylene catalyst and application

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preparation example Construction

[0058] In step (1), "providing a mesoporous molecular sieve material with a hexagonal pore structure" can be directly weighing or selecting a product of a mesoporous molecular sieve material with a hexagonal pore structure, or preparing a mesoporous molecular sieve with a hexagonal pore structure Material. The preparation method of the mesoporous molecular sieve material with a hexagonal pore structure can be implemented according to a conventional method, for example, the preparation method can include: preparing a filter cake of a mesoporous molecular sieve material with a hexagonal pore structure according to the above method, and then filtering the obtained The cake is dried and the templating agent is removed from the dried product. The conditions for removing the template agent may include: a temperature of 300-600° C. and a time of 10-80 hours.

[0059] In step (2), the process of preparing the filter cake of silica gel may include: contacting water glass with inorgani...

Embodiment 1

[0084] This example is used to illustrate the supported polyethylene catalyst component of the present invention and its preparation method.

[0085] (1) Preparation of spherical composite carrier

[0086] Add 1.0g (0.0002mol) of triblock copolymer surfactant P123 and 2.76g (0.06mol) of ethanol to 28ml of acetic acid and sodium acetate buffer with a pH value of 4, and stir at 15°C until P123 is completely dissolved , then add 6g (0.053mol) trimethylpentane to the resulting solution, stir at 15°C for 8h, then add 2.13g (0.014mol) tetramethoxysilane, at 15°C, pH value is 4.5 Stirring for 20h under the conditions, and then transfer the obtained solution to a polytetrafluoroethylene-lined reaction kettle, crystallize at 60°C for 24h, then filter and wash 4 times with deionized water, and then suction filter to obtain a hexagonal Filter cake A1 of mesoporous molecular sieve material with pore structure.

[0087] Concentration is that the water glass of 15% by weight and the sulfu...

Embodiment 2

[0107] This example is used to illustrate the supported polyethylene catalyst component of the present invention and its preparation method.

[0108] (1) Preparation of spherical composite carrier

[0109] Add 1.0g (0.0002mol) triblock copolymer surfactant P123 and 1.84g (0.04mol) ethanol to 28ml buffer solution of acetic acid and sodium acetate with a pH value of 5, and stir at 15°C until P123 is completely Dissolve, then add 9.12g (0.08mol) trimethylpentane to the resulting solution, stir at 15°C for 8h, then add 3.04g (0.02mol) tetramethoxysilane, at 25°C, pH Stirred under the condition of 5.5 for 15h, then transferred the obtained solution to a polytetrafluoroethylene-lined reactor, crystallized at 100°C for 20h, then filtered and washed 4 times with deionized water, and then suction filtered to obtain Filter cake A2 of mesoporous molecular sieve material with hexagonal pore structure.

[0110] Concentration is that the water glass of 15% by weight and the sulfuric acid ...

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Abstract

The invention discloses a supported polyethylene catalyst component, a preparation method thereof, a supported polyethylene catalyst and its application. The supported polyethylene catalyst component comprises a spherical composite carrier and magnesium salts and titanium salts loaded on the spherical composite carrier, wherein the spherical composite carrier contains mesoporous molecular sieve materials with a hexagonal pore structure and silica gel, the The average particle size of the spherical composite carrier is 30-60 microns, the specific surface area is 200-650 square meters per gram, the pore volume is 0.5-1.5 milliliters per gram, the pore size is bimodal, and the bimodal corresponds to the first most probable Pore ​​diameter and second most probable pore diameter, the first most probable pore diameter is 1-10 nanometers, and the second most probable pore diameter is 10-40 nanometers. The supported catalyst provided by the invention has higher catalytic efficiency in the process of catalyzing ethylene polymerization.

Description

technical field [0001] The present invention relates to a supported polyethylene catalyst component, a preparation method of the supported polyethylene catalyst component, a supported polyethylene catalyst component prepared by the method, a supported polyethylene catalyst comprising the catalyst component, And the application of the catalyst in ethylene polymerization. Background technique [0002] Mesoporous molecular sieve materials have the advantages of ordered pores, adjustable pore size, large specific surface area and pore volume, and are good catalysts and carrier materials. In recent years, heterogeneous catalysts such as solid acids and heteropolyacids prepared by using mesoporous molecular sieve materials as templates not only have high catalytic activity for ethylene polymerization, but also have fewer side reactions and simpler post-treatment. [0003] The development and application of polyethylene catalysts is another major breakthrough in the field of olefi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/02C08F4/646
Inventor 亢宇张明森王洪涛
Owner CHINA PETROLEUM & CHEM CORP
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