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Spherical mesoporous composite material and supported catalyst and preparation method thereof

A composite material and mesoporous technology, applied in the field of mesoporous materials, can solve the problems of affecting catalytic activity, poor thermal stability and hydrothermal stability, and low ethylene polymerization activity

Active Publication Date: 2020-10-23
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 mesoporous composite material and supported catalyst and preparation method thereof
  • Spherical mesoporous composite material and supported catalyst and preparation method thereof
  • Spherical mesoporous composite material and supported catalyst and preparation method thereof

Examples

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preparation example Construction

[0034] The present invention also provides a kind of preparation method of spherical mesoporous composite material, and this method comprises the following steps:

[0035] (1) providing mesoporous molecular sieve material or preparing a filter cake of mesoporous molecular sieve material as component a;

[0036] (2) providing silica gel or preparing a filter cake of silica gel as component b;

[0037](3) The component a and the component b are mixed and first ball milled, the obtained first ball mill slurry is mixed with water for slurrying, then the second ball mill is carried out to obtain the second ball mill slurry, and After the second ball mill slurry is spray-dried, it is screened by cyclone separation technology;

[0038] Wherein, the above steps make the spherical mesoporous composite material have an average particle diameter of 20-30 microns, a specific surface area of ​​100-300 square meters per gram, a pore volume of 0.5-1.8 milliliters per gram, and a bimodal dis...

Embodiment approach

[0049] According to a preferred embodiment of the present invention, the process of the first mixed contact includes: (1) cetyltrimethylammonium bromide (CTAB), polyethylene glycol octylphenyl ether (Trilar General X-100) and hydrochloric acid at 25-60°C until dissolved; (2) Stir the solution obtained in step (1) and silicate at 25-60°C for 10-72 hours, and let stand for 10-72 hours Hour.

[0050] In the present invention, the conditions for the crystallization are not particularly limited, and may be selected conventionally in the art. For example, the crystallization conditions include: the temperature may be 25-60° C., preferably 30-50° C.; the time may be 10-40 hours, preferably 15-35 hours. According to a preferred embodiment, the crystallization is carried out by hydrothermal crystallization.

[0051] In the present invention, in the above-mentioned process of preparing the filter cake of the mesoporous molecular sieve material, the process of obtaining the filter cake...

Embodiment 1

[0088] This example is used to illustrate the spherical mesoporous composite material and supported catalyst of the present invention and its preparation method

[0089] (1) Preparation of spherical mesoporous composites

[0090] 1.5 grams of CTAB (cetyltrimethylammonium bromide) and 1.5 ml of polyethylene glycol octylphenyl ether (Triton-X100) were added to 29.6 grams of 37% by weight of concentrated hydrochloric acid and 75 grams of In hydrochloric acid composed of water, mix and stir at 40°C until CTAB is completely dissolved; then add 4.35 grams of tetraethyl orthosilicate to the above solution, and stir for 15 hours at 40°C with a mechanical stirring rate of 340r / min , standing at 40° C. for 24 hours; the resulting solution was transferred to a polytetrafluoroethylene-lined reactor, crystallized at 50° C. for 24 hours, filtered and washed to obtain a mesoporous material filter cake A1.

[0091] The water glass with a concentration of 15% by weight and the sulfuric acid s...

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Abstract

The invention discloses a spherical mesoporous composite material, and a supported catalyst and a preparation method thereof, belonging to the field of mesoporous materials. The spherical mesoporous composite material has an average particle size of 20-30 micrometers, a specific surface area of 100-300 square meters / gram and a pore volume of 0.5-1.8 ml / gram; and the pore diameters of the spherical mesoporous composite material are in the form of bimodal distribution, and the most probable pore diameters corresponding to double peaks are 1-10 nm and 20-55 nm, respectively. The spherical mesoporous composite material provided by the invention has a stable mesoporous structure and uniform particle size distribution, and is high in strength and not prone to breakage as a catalyst; and the supported polyethylene catalyst prepared from the same has high catalytic activity when used for catalysis of ethylene polymerization, and polyethylene products which have low bulk density and a low melt index and are not prone to breakage are broken can be obtained.

Description

technical field [0001] The present invention relates to the field of mesoporous materials, in particular to a spherical mesoporous composite material, a method for preparing the spherical mesoporous composite material, a spherical mesoporous composite material prepared by the method, a supported catalyst, a loaded A method for preparing a type 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 mechanical strength and good...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F110/02C08F4/02C08F4/645
CPCC08F10/02C08F110/02C08F4/02C08F4/025C08F4/645C08F2500/18C08F2500/12Y02P20/52
Inventor 亢宇张明森吕新平
Owner CHINA PETROLEUM & CHEM CORP
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