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Spherical sepiolite mesoporous composite material and supported catalyst and preparation method thereof

A supported catalyst and composite material technology, applied in the field of mesoporous materials, can solve the problems of poor thermal stability and hydrothermal stability, low ethylene polymerization activity, affecting catalytic activity, etc., achieve stable mesoporous structure, less side reactions, good fluidity

Active Publication Date: 2020-06-09
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 sepiolite mesoporous composite material and supported catalyst and preparation method thereof
  • Spherical sepiolite mesoporous composite material and supported catalyst and preparation method thereof
  • Spherical sepiolite mesoporous composite material and supported catalyst and preparation method thereof

Examples

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preparation example Construction

[0040] In the preparation process of the above-mentioned spherical sepiolite mesoporous composite material, the pore size distribution of the spherical sepiolite mesoporous composite material is controlled to a multimodal distribution mainly by controlling the composition of the mesoporous material filter cake (component a) , and mainly by controlling the molding method (that is, firstly mixing the component a, the component b, sepiolite and the binder uniformly and ball milling, and then the solid powder obtained after the ball milling is slurried with water and then spray-dried) The microscopic morphology of the spherical sepiolite mesoporous composite material is controlled to be spherical.

[0041] According to the present invention, in step (1), the process of preparing the filter cake of the mesoporous molecular sieve material with a cubic cage-like pore structure may include: carrying out a first mixing contact with template agent, potassium sulfate, acid agent and tetra...

Embodiment approach

[0045] In the present invention, the conditions of the first mixed contact include: the temperature may be 10-60°C, preferably 25-60°C; the time may be 10-72 hours, preferably 10-30 hours; the pH value may be 1 -7, preferably 3-6. In order to be more conducive to uniform mixing among the various substances, according to a preferred embodiment of the present invention, the first mixing and contacting is performed under stirring conditions.

[0046] In the present invention, the crystallization conditions include: the temperature may be 30-150° C., preferably 90-150° C.; the time may be 10-72 hours, preferably 10-40 hours. According to a preferred embodiment, the crystallization is carried out by hydrothermal crystallization.

[0047] In the present invention, in the process of preparing the filter cake of the mesoporous molecular sieve material having a cubic cage-like pore structure, the process of obtaining the filter cake by filtering may include: washing after filtering, a...

Embodiment 1

[0082] This example is used to illustrate the spherical sepiolite mesoporous composite material and supported catalyst of the present invention and the preparation method thereof.

[0083] (1) Preparation of spherical sepiolite mesoporous composites

[0084] With 1.46g (0.0001mol) template F108, 5.24g (0.03mol) of K 2 SO 4 Stir with 60g of hydrochloric acid solution with a normality of 2 (2N) at 38°C until F108 is completely dissolved;

[0085] Add 4.2g (0.02mol) of tetraethyl orthosilicate to the above solution, stir at 38°C for 15 minutes, and stand at 38°C for 24 hours;

[0086] Then it was transferred to an agate-lined reaction kettle, crystallized at 100°C for 24 hours, then filtered and washed 4 times with deionized water, and dried to obtain the original powder mesoporous material; the original powder mesoporous material was washed with ethanol Reflux washing at 78° C. for 24 hours, and then suction filtration to obtain filter cake A1 of mesoporous molecular sieve ma...

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Abstract

The invention relates to the field of mesoporous materials and discloses a spherical sepiolite mesoporous composite material and a supported catalyst comprising same. The spherical sepiolite mesoporous composite material includes sepiolite and a mesoporous molecular sieve material which has a cube-cage-shaped pore structure. The composite material has a stable mesoporous structure since the spherical sepiolite mesoporous composite material includes the sepiolite and the mesoporous molecular sieve material in cube-cage-shaped pore structure. By means of the supported catalyst, a polyethylene product, which has low bulk density and melt index and is not liable to break, can be produced.

Description

technical field [0001] The present invention relates to the field of mesoporous materials, in particular to a spherical sepiolite mesoporous composite material, a preparation method of the spherical sepiolite mesoporous composite material, a spherical sepiolite mesoporous composite material prepared by the method, A supported catalyst, a method for preparing the supported catalyst, and a supported 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 pore volume (1.0cm 3 / g), thicker pore wall (4-6nm), high...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/02C08F110/02C08F4/645
CPCC08F10/02C08F110/02C08F4/025C08F4/027C08F4/645C08F2500/18C08F2500/12
Inventor 亢宇张明森
Owner CHINA PETROLEUM & CHEM CORP
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