Isobutane dehydrogenation catalyst with supporter being composite material containing silica gel and hexagonal mesoporous material as well as preparation method and application thereof

A technology for dehydrogenation catalysts and mesoporous materials, applied in catalyst activation/preparation, carbon compound catalysts, catalysts, etc., can solve problems such as uneven dispersion of noble metal active components, poor catalytic activity and stability, and reduce the risk of carbon deposition , the conditions are easy to control, and the effect of improving selectivity

Inactive Publication Date: 2019-12-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of the existing isobutane dehydrogenation catalysts, such as uneven dispersion of precious metal active components, poor catalytic activity and stability, and to provide a carrier that is a composite material containing silica gel and hexagonal mesoporous materials. Isobutane dehydrogenation catalyst and preparation method thereof, the isobutane dehydrogenation catalyst prepared by the method and the application of the isobutane dehydrogenation catalyst in isobutane dehydrogenation to isobutene, the method provided by the invention is easy to operate, Environmentally friendly and low cost, and the isobutane dehydrogenation catalyst prepared by this method can achieve better dehydrogenation activity, selectivity, stability and carbon deposition resistance under the condition that the precious metal loading is very low

Method used

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  • Isobutane dehydrogenation catalyst with supporter being composite material containing silica gel and hexagonal mesoporous material as well as preparation method and application thereof
  • Isobutane dehydrogenation catalyst with supporter being composite material containing silica gel and hexagonal mesoporous material as well as preparation method and application thereof
  • Isobutane dehydrogenation catalyst with supporter being composite material containing silica gel and hexagonal mesoporous material as well as preparation method and application thereof

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Embodiment approach

[0040] The present invention has no special limitation on the conditions of the mixing and contacting, for example, the conditions of the mixing and contacting may include: a temperature of 25-60° C., a time of 10-72 hours, and a pH value of 1-7. In order to be more conducive to the uniform mixing of various substances, according to a preferred embodiment of the present invention, the mixing and contacting is carried out under stirring conditions.

[0041] In the present invention, the crystallization conditions are not particularly limited. For example, the crystallization conditions may include: a temperature of 30-150°C, preferably 90-150°C; a time of 10-72h, preferably 10 -40h. According to a preferred embodiment, the crystallization is carried out by hydrothermal crystallization.

[0042] In the present invention, in the above-mentioned process of preparing the hexagonal mesoporous material, the process of obtaining the raw powder of the hexagonal mesoporous material by ...

Embodiment 1

[0083] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0084] (1) Preparation of carrier

[0085] 2g (1.4×10 -4 mol) template agent 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;

[0086] Add 4.2g (0.02mol) of tetraethyl orthosilicate to the above solution, stir at 38°C for 15min, and stand at 38°C for 24h;

[0087] After adding 100 grams of deionized water to dilute, filter, wash and dry, the original powder mesoporous material is obtained;

[0088] Calcining the original powder mesoporous material at 400°C for 10 hours to remove the template agent and obtain the hexagonal mesoporous material;

[0089] The hexagonal mesoporous material was calcined at 400°C for 10 hours under the protection of nitrogen (the first heat activation), the hydroxyl group and residual moisture were removed, and the hexagonal mesoporous ma...

Embodiment 2

[0108] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0109] (1) Preparation of carrier

[0110] 1.46g (1×10 -4 mol) template agent 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;

[0111] Add 3.1g (0.015mol) of tetraethyl orthosilicate to the above solution, stir at 38°C for 15min, and stand at 38°C for 24h;

[0112] After adding 100 grams of deionized water to dilute, filter, wash and dry, the original powder mesoporous material is obtained;

[0113] Calcining the original powder mesoporous material at 400°C for 10 hours to remove the template agent and obtain the hexagonal mesoporous material;

[0114] The hexagonal mesoporous material was calcined at 400°C for 10 hours under the protection of nitrogen (the first heat activation), the hydroxyl group and residual moisture were removed, and the hexagonal mesoporous ...

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Abstract

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst with a supporter being a composite material containing silica gel and hexagonal mesoporous materialas well as a preparation method and application of the isobutane dehydrogenation catalyst. The method comprises the following steps: (a) preparing hexagonal mesoporous material raw powder; (b) preparing a hexagonal mesoporous material; (c) carrying out activation treatment on the hexagonal mesoporous material; and (d) carrying out activation treatment on the supporter, then carrying out impregnation treatment in a solution containing a Pt component precursor and a Zn component precursor, and then sequentially carrying out solvent removal treatment, drying treatment and roasting treatment. According to the method, the isobutane dehydrogenation catalyst with high catalytic activity can be synthesized by using a low-cost silicon source.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to an isobutane dehydrogenation catalyst whose carrier is a composite material containing silica gel and a hexagonal mesoporous material, a preparation method thereof, an isobutane dehydrogenation catalyst prepared by the method, and the isobutane dehydrogenation catalyst Application of butane dehydrogenation catalyst in isobutane dehydrogenation to isobutene. Background technique [0002] Isobutylene is a very important organic chemical raw material, mainly used in the preparation of methyl tert-butyl ether, butyl rubber, methyl ethyl ketone, polyisobutylene, methyl methacrylate, isoprene, tert-butylphenol, tert-butylamine, 1, Various organic raw materials and fine chemicals such as 4-butanediol and ABS resin. The main source of isobutene is the by-product C4 fraction of naphtha steam cracking ethylene unit, the by-product C4 fraction of refinery fluid catalytic cracking (FCC) unit and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/60B01J37/02B01J37/08B01J37/10B01J35/10B01J32/00C07C5/333C07C11/09
CPCB01J23/60B01J37/02B01J37/08B01J37/0018B01J37/10B01J35/1019B01J35/1023B01J35/1028B01J35/1061B01J35/1042B01J35/1047C07C5/3337C07C2523/60C07C11/09
Inventor 亢宇刘红梅刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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