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Spherical small particle size mesoporous composite material and supported catalyst and preparation method thereof

A composite material and small particle size 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, improve fluidity, Apply handy effects

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 small particle size mesoporous composite material and supported catalyst and preparation method thereof
  • Spherical small particle size mesoporous composite material and supported catalyst and preparation method thereof
  • Spherical small particle size mesoporous composite material and supported catalyst and preparation method thereof

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Embodiment approach

[0028] According to a preferred embodiment of the present invention, the average particle diameter of the spherical small-diameter mesoporous composite material is 22-28 microns, the specific surface area is 250-350 square meters per gram, and the pore volume is 1.0-1.5 milliliters / gram. grams, the pore size is bimodal, and the most probable pore sizes corresponding to the bimodal are 5-10 nanometers and 20-35 nanometers;

[0029] According to a more preferred embodiment of the present invention, the average particle diameter of the spherical small particle mesoporous composite material is 23-27 microns, the specific surface area is 300-340 square meters per gram, and the pore volume is 1.1-1.4 ml / g, the pore size distribution is bimodal, and the most probable pore sizes corresponding to the bimodal are 6-9 nanometers and 25-35 nanometers respectively.

[0030] In the present invention, the average particle diameter of the spherical small particle diameter mesoporous composit...

Embodiment 1

[0087] This example is used to illustrate the spherical small particle size mesoporous composite material and supported catalyst of the present invention and the preparation method thereof.

[0088] (1) Preparation of spherical small particle size mesoporous composites

[0089] 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;

[0090] 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;

[0091] Then it was transferred to an agate-lined reactor, crystallized at 100°C for 24 hours, then filtered and washed 4 times with deionized water, and then suction filtered to obtain a mesoporous molecular sieve material with a three-dimensional cubic cage-like channel structure. Filter cake A1.

[0092] The water glass with a concentration of 15% by weight and the sulfuric acid s...

Embodiment 2

[0107] This example is used to illustrate the spherical small particle size mesoporous composite material and supported catalyst of the present invention and the preparation method thereof.

[0108] (1) Preparation of spherical small particle size mesoporous composites

[0109] With 1.46g (0.0001mol) template F108, 6.96g (0.04mol) 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;

[0110] Add 3.1g (0.015mol) of tetraethyl orthosilicate to the above solution, stir at 45°C for 15min, and stand at 45°C for 30 hours;

[0111] Then it was transferred to an agate-lined reactor, crystallized at 120°C for 30 hours, then filtered and washed 4 times with deionized water, and then suction filtered to obtain a mesoporous molecular sieve material with a three-dimensional cubic cage-like channel structure. Filter cake A2.

[0112] A concentration of 20% by weight of water glass and a concentration of 12% by wei...

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Abstract

The invention relates to the field of mesoporous materials, and discloses a spherical small-size mesoporous composite material, a supported catalyst, and preparation methods of the spherical small-size mesoporous composite material and the supported catalyst. The spherical small-size mesoporous composite material contains a mesoporous molecular sieve material having a three-dimensional cubic cage-like pore channel structure, and has the average particle size of 15-30 [mu]m, the specific surface area of 200-650 m<2> / g, and the pore volume of 0.5-1.5 ml / g, wherein the pore sizes are distributedin a bimodal manner. According to the present invention, the spherical small-size mesoporous composite material has characteristics of stable mesoporous structure and uniform particle size distribution, and can provide the advantages of high strength and breaking resistance in the application as the catalyst carrier; and with the application of the supported polyethylene catalyst prepared from thespherical small-size mesoporous composite material in the catalysis of ethylene polymerization reactions, the high catalytic activity can be provided, and the polyethylene products with characteristics of low bulk density, low melt index and breaking resistance can be obtained.

Description

technical field [0001] The present invention relates to the field of mesoporous materials, in particular to a spherical small particle diameter mesoporous composite material, a method for preparing a spherical small particle diameter mesoporous composite material, and a spherical small particle diameter 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/02C08F4/645C08F4/02
CPCC08F4/025C08F4/645C08F110/02
Inventor 亢宇张明森吕新平
Owner CHINA PETROLEUM & CHEM CORP
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