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Spherical 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 problems such as poor thermal stability and hydrothermal stability, low ethylene polymerization activity, and affect the loading effect, so as to achieve stable mesoporous structure, improve fluidity, Apply handy effects

Active Publication Date: 2018-05-11
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

[0033]The present invention also provides a preparation method of the spherical mesoporous composite material, which comprises the following steps:

[0034] (1) providing a mesoporous molecular sieve material having a one-dimensional hollow spherical channel structure or preparing a filter cake of the mesoporous molecular sieve material having a one-dimensional hollow spherical channel structure as component a;

[0035] (2) providing silica gel or a filter cake for preparing silica gel as component b;

[0036] (3) mixing the component a and the component b and performing the first ball milling, mixing the obtained first ball milling slurry with water to make a slurry, and then performing the second ball milling to obtain the second ball milling slurry, and The second ball mill slurry is spray-dried and then screened by cyclone separation technology;

[0037] Wherein, the above steps make the spherical mesoporous composite material have an average particle size of 21-29 micron...

Embodiment approach

[0047] The present invention has no particular limitation on the conditions of the first mixed contact. For example, the conditions of the first mixed contact generally include: the temperature may be 10-60° C., preferably 10-20° C.; the time may be 10-72° C. hours, preferably 10-30 hours; pH value can be 1-7, preferably 3-6. In order to be more conducive to the uniform mixing of various substances, according to a preferred embodiment of the present invention, the first mixing and contacting is performed under stirring conditions.

[0048] In the present invention, the crystallization conditions include: the temperature can be 30-150°C, preferably 40-80°C; the time can be 10-72 hours, preferably 20-30 hours. According to a preferred embodiment, the crystallization is carried out by hydrothermal crystallization.

[0049] In step (1), in the above-mentioned process of preparing the filter cake of the mesoporous molecular sieve material with one-dimensional hollow spherical pore...

Embodiment 1

[0086] This example is used to illustrate the spherical mesoporous composite material and the supported catalyst of the present invention and the preparation method thereof

[0087] (1) Preparation of spherical mesoporous composites

[0088] Add 1 g (0.00017 mol) of template agent P123 and 1.69 g (0.037 mol) of ethanol to 28 mL of pH=4.4 acetic acid and sodium acetate buffer solution, stir at 15°C until the template agent is completely dissolved, add 6 g (0.05 mol) of trisodium Methylpentane was added to the above solution, and after stirring at 15 °C for 8 hours, 2.13 g (0.014 mol) of tetramethoxysilane was added to the above solution. After stirring at 15 °C for 20 hours, the solution was transferred to the agate lining After being crystallized in an oven at 60 °C for 24 hours, the reaction kettle was filtered and washed with deionized water for 4 times, and then suction filtered to obtain a filter cake A1 of mesoporous molecular sieve material with a one-dimensional hollow ...

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Abstract

The invention relates to the field of mesoporous materials, and discloses a spherical mesoporous composite material and a supported catalyst and a preparation method thereof. The spherical mesoporouscomposite material comprises a mesoporous molecular sieve material with a one-dimensional hollow spherical pore structure, and the spherical mesoporous composite material has an average particle sizeof 21 to 29 microns, a specific surface area of 100-650 m<2> / g, and a pore volume of 0.5-1.8 ml / g, and the pore diameter is in trimodal distribution. The spherical mesoporous composite material provided by the invention has the advantages of stable mesoporous structure and uniform particle size distribution, the spherical mesoporous composite material as a catalyst carrier is high in strength andnot easily broken, and the supported polyethylene catalyst prepared from the spherical mesoporous composite material has high catalytic activity when catalyzing ethylene polymerization. A polyethyleneproduct which has a low bulk density and a low melt index and is not easily broken can be obtained.

Description

technical field [0001] The invention relates to the field of mesoporous materials, in particular to a spherical mesoporous composite material, a preparation method of the spherical mesoporous composite material, a spherical mesoporous composite material prepared by the method, a supported catalyst, a supported The preparation method of the catalyst, and the supported catalyst prepared by the method. Background technique [0002] Since 1992, Mobile company synthesized regular mesoporous materials with highly ordered channels. Due to their high specific surface area, regular channel structure and narrow pore size distribution, the application of mesoporous materials in catalysis, separation, medicine and other fields has been obtained. great attention. In 1998, Zhao Dongyuan et al. synthesized a new type of material - mesoporous material SBA-15, which has a highly ordered pore size (6-30nm) and a large pore volume (1.0cm). 3 / g), thicker pore walls (4-6 nm), retained high me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/02C08F10/02C08F110/02C08F4/643
CPCC08F10/02C08F110/02C08F4/02C08F4/025C08F4/643C08F2500/18C08F2500/12Y02P20/52
Inventor 亢宇张明森吕新平
Owner CHINA PETROLEUM & CHEM CORP
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