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Spherical double-mesoporous-structure composite material, supported polyethylene catalyst, and preparation methods therefor

A composite material and double mesoporous technology, applied in the field of supported polyethylene catalysts, can solve the problems of low ethylene polymerization activity, poor thermal and hydrothermal stability, collapse of pore walls, etc., and achieve high catalytic activity and mesoporous structure. Stable, unbreakable effect

Active Publication Date: 2017-12-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason for the low ethylene polymerization activity of the mesoporous material MCM-41 after loading the catalyst is that the thermal and hydrothermal stability of the pore wall structure of MCM-41 is poor, and the pore wall partially collapses during the loading process, which affects the loading. effect, so that it affects the catalytic activity

Method used

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  • Spherical double-mesoporous-structure composite material, supported polyethylene catalyst, and preparation methods therefor
  • Spherical double-mesoporous-structure composite material, supported polyethylene catalyst, and preparation methods therefor
  • Spherical double-mesoporous-structure composite material, supported polyethylene catalyst, and preparation methods therefor

Examples

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preparation example Construction

[0048] In step (1), "providing a mesoporous molecular sieve material with a hollow spherical structure" can be directly weighing or selecting a product of a mesoporous molecular sieve material with a hollow spherical structure, or preparing a mesoporous molecular sieve with a hollow spherical structure Material. The preparation method of the mesoporous molecular sieve material with a hollow spherical 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 hollow spherical structure according to the above method, and then filtering the obtained The cake is dry.

[0049] In step (2), the process of preparing a filter cake of a mesoporous molecular sieve material having a three-dimensional cubic cage structure may include: in an acidic aqueous solution, in the presence of potassium sulfate, contacting a template agent with a silicon source, and The mi...

Embodiment 1

[0094] This example is used to illustrate the spherical double mesoporous structure composite material and supported catalyst of the present invention and their preparation methods.

[0095] (1) Preparation of spherical double mesoporous structure composites

[0096] Add 1g (0.00017mol) of template agent P123 and 1.69g (0.037mol) of ethanol into 28mL of acetic acid and sodium acetate buffer solution with pH = 4.4, stir at 15°C until the template agent is completely dissolved, and add 6g (0.05mol) of three Add methylpentane to the above solution, stir at 15°C for 8h, then add 2.13g (0.014mol) tetramethoxysilane to the above solution, stir at 15°C for 20h, then transfer the solution to the agate lining After crystallization in an oven at 60°C for 24 hours in a reaction kettle, filter and wash with deionized water for 4 times, and then suction filter to obtain a filter cake A1 of mesoporous molecular sieve material with a hollow spherical structure.

[0097] 1.46g (0.0001mol) te...

Embodiment 2

[0119] This example is used to illustrate the spherical double mesoporous structure composite material and supported catalyst of the present invention and their preparation methods.

[0120] (1) Preparation of spherical double mesoporous structure composites

[0121] Add 1g (0.00017mol) template agent P123 and 1.4g (0.03mol) ethanol to 28mL of acetic acid and sodium acetate buffer solution with pH = 4.4, stir at 10°C until the template agent is completely dissolved, add 4.56g (0.04mol) Add trimethylpentane to the above solution, stir at 10°C for 8h, then add 1.83g (0.012mol) tetramethoxysilane to the above solution, stir at 10°C for 30h, then transfer the solution into agate In a lined reactor, after crystallization in an oven at 80°C for 20 hours, filter and wash with deionized water for 6 times, and then suction filter to obtain filter cake A2 of mesoporous molecular sieve material with a hollow spherical structure.

[0122] 1.46g (0.0001mol) template agent F108, 6.96g (0.0...

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Abstract

The invention relates to the field of catalysts, and particularly relates to: a spherical double-mesoporous-structure composite material, a preparation method of the spherical double-mesoporous-structure composite material, the spherical double-mesoporous-structure composite material produced through the method, a supported polyethylene catalyst, a preparation method of the supported polyethylene catalyst, and the supported polyethylene catalyst produced through the method. The spherical double-mesoporous-structure composite material contains a mesoporous molecular sieve material having a hollow-spherical structure, a mesoporous molecular sieve material having a three-dimensional cube-cage-shaped structure, and silica gel. The spherical double-mesoporous-structure composite material has stable mesoporous structure and can maintain an order mesoporous structure even after supporting an active component. In addition, the supported polyethylene catalyst produced therewith has high catalytic activity when being used for catalyzing an ethylene polymerization reaction.

Description

technical field [0001] The present invention relates to the field of catalysts, in particular to a spherical double mesoporous structure composite material, a preparation method of the spherical double mesoporous structure composite material, a spherical double mesoporous structure composite material prepared by the method, a supported polymer An ethylene catalyst, a preparation method of the supported polyethylene catalyst, and a supported polyethylene catalyst prepared by the method. Background technique [0002] Since Mobile’s synthetic mesoporous materials with highly ordered pores have been synthesized in 1992, due to their high specific surface area, regular pore structure and narrow pore size distribution, mesoporous materials have been widely used in the fields of catalysis, separation, and medicine. Great attention. In 1998, Zhao Dongyuan and others synthesized a new type of material - mesoporous material SBA-15, which has highly ordered pore size (6-30nm), large p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/02C08F4/645C08F110/02
CPCC08F4/02C08F4/645C08F110/02
Inventor 亢宇张明森
Owner CHINA PETROLEUM & CHEM CORP
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