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Non-noble metal isobutane dehydrogenation catalyst taking eggshell-shaped mesoporous material as carrier, preparation method and application thereof

A dehydrogenation catalyst and non-precious metal technology, applied in catalyst activation/preparation, physical/chemical process catalysts, hydrocarbons, etc., can solve the problems of high production cost, environmental pollution, etc., and achieve high selectivity and high alkane conversion rate , the effect of good catalytic performance

Inactive 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

[0007] The purpose of the present invention is to provide a non-precious metal isobutane dehydrogenation catalyst and its preparation method and application in order to overcome the defects of high preparation cost and easy to cause environmental pollution of non-precious metal isobutane dehydrogenation catalysts in the prior art , the dehydrogenation catalyst of the present invention can achieve better dehydrogenation activity, selectivity and stability without using precious metals and metal components with serious pollution

Method used

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  • Non-noble metal isobutane dehydrogenation catalyst taking eggshell-shaped mesoporous material as carrier, preparation method and application thereof
  • Non-noble metal isobutane dehydrogenation catalyst taking eggshell-shaped mesoporous material as carrier, preparation method and application thereof
  • Non-noble metal isobutane dehydrogenation catalyst taking eggshell-shaped mesoporous material as carrier, preparation method and application thereof

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Embodiment approach

[0036] According to the present invention, in the step (a), the mixing and contacting conditions include: temperature 10-60° C., time 0.2-100 h, pH 1-6; the pH value can be formed by adding hydrochloric acid, for example. 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.

[0037]According to the present invention, in step (a), the solution condition may be an aqueous solution condition. Preferably, in order to facilitate the dissolving of the template agent, a buffer solution of acetic acid and sodium acetate with a pH value of 1-6 can be used to form a solution condition, and for example alcohol reagents (such as methanol, ethanol, n-propanol, etc.) , isopropanol, etc.).

[0038] Preferably, the amount weight ratio of the templating agent, the trimethylpentane and the tetramethoxysilane is 1:(1.2-20):(0.1-15); more prefera...

Embodiment 1

[0084] This example is used to illustrate the non-noble metal-based isobutane dehydrogenation catalyst and its preparation method.

[0085] (1) Preparation of eggshell-like mesoporous material carrier

[0086] Add 1.0 g of three-stage copolymer polyethylene glycol-polyglycerol-polyethylene glycol P123 and 1.69 g of ethanol to 28 mL of a buffer solution of acetic acid and sodium acetate with a pH value of 4.4, and stir at 15 °C until poly Ethylene glycol-polyglycerol-polyethylene glycol P123 is completely dissolved; then 6g of trimethylpentane is added to the above solution, and after stirring for 8 hours at 15°C, 2.13 g of tetramethoxysilane is added to the above solution , after stirring at 15°C for 20h, the solution was transferred to a polytetrafluoroethylene-lined reactor, crystallized at 60°C for 24h, and then filtered, washed, and dried to obtain the raw eggshell-like mesoporous material powder. The eggshell-shaped mesoporous material raw powder was calcined in a muffle...

Embodiment 2

[0101] This example is used to illustrate the non-noble metal-based isobutane dehydrogenation catalyst and its preparation method.

[0102] (1) Preparation of eggshell-like mesoporous material carrier

[0103] Add 1.0 g of three-stage copolymer polyethylene glycol-polyglycerol-polyethylene glycol P123 and 1.84 g of ethanol to 28 mL of a buffer solution of acetic acid and sodium acetate with a pH value of 5, and stir at 40 °C until poly Ethylene glycol-polyglycerol-polyethylene glycol is completely dissolved; then 9.12g of trimethylpentane is added to the above solution, and after stirring at 40°C for 6h, 3.04g of tetramethoxysilane is added to the above solution , after stirring at 40°C for 15h, the solution was transferred to a polytetrafluoroethylene-lined reactor, crystallized at 100°C for 10h, and then filtered, washed, and dried to obtain the raw eggshell-like mesoporous material powder. The eggshell-shaped mesoporous material raw powder was calcined in a muffle furnace ...

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Abstract

The invention relates to the field of catalysts, and discloses a non-noble metal isobutane dehydrogenation catalyst, a preparation method and application thereof. The method for preparing the non-noble metal isobutane dehydrogenation catalyst comprises the following steps: (a) providing eggshell-shaped mesoporous material raw powder; (b) carrying out template agent removing treatment on the eggshell-shaped mesoporous material raw powder to obtain an eggshell-shaped mesoporous material carrier; (c) under an ultrasonic condition, loading a first active non-noble metal component and a second active non-noble metal component on the eggshell-shaped mesoporous material carrier to obtain an initial non-noble metal isobutane dehydrogenation catalyst; and (d) vulcanizing the initial non-noble metalisobutane dehydrogenation catalyst by using a sulfur-containing gas. The obtained non-noble metal isobutane dehydrogenation catalyst has good dehydrogenation activity, good selectivity and good stability.

Description

technical field [0001] The present invention relates to the field of catalysts, in particular to a method for preparing a non-precious metal-based isobutane dehydrogenation catalyst whose carrier is an eggshell-like mesoporous material and a non-precious metal-based isobutane dehydrogenation catalyst prepared by the method. And the application of the non-noble metal-based isobutane dehydrogenation catalyst in the production of isobutene from isobutane dehydrogenation. 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 cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043B01J27/04B01J37/34B01J37/08B01J37/20B01J35/10C07C5/333C07C11/09
CPCB01J27/043B01J27/04B01J37/343B01J37/0018B01J37/20C07C5/3332B01J35/638B01J35/635B01J35/615C07C11/09
Inventor 刘红梅亢宇刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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