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Non-noble metal isobutane dehydrogenation catalyst taking rod-like mesoporous molecular sieve as carrier, preparation method and applications thereof

A technology of dehydrogenation catalyst and mesoporous molecular sieve, which is applied in the direction of molecular sieve catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc. It can solve the problems of high preparation cost and environmental pollution, and achieve high selectivity and high alkane conversion rate , the effect of good catalytic performance

Inactive Publication Date: 2020-05-12
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 rod-like mesoporous molecular sieve as carrier, preparation method and applications thereof
  • Non-noble metal isobutane dehydrogenation catalyst taking rod-like mesoporous molecular sieve as carrier, preparation method and applications thereof
  • Non-noble metal isobutane dehydrogenation catalyst taking rod-like mesoporous molecular sieve as carrier, preparation method and applications thereof

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Embodiment approach

[0038] Preferably, in step (a), the mixing and contacting conditions include: a temperature of 25-60° C., a time of more than 25 minutes, and a pH of 1-6. 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.

[0039] In the present invention, the amount of the template agent and the silicon source can be changed within a wide range, for example, the molar ratio of the template agent and the amount of the silicon source can be 1:10-90; preferably 1: 50-75.

[0040] In the present invention, the silicon source can be various silicon sources conventionally used in the art, preferably the silicon source is ethyl orthosilicate, methyl orthosilicate, propyl orthosilicate, sodium orthosilicate and At least one of silica sol, more preferably tetraethyl orthosilicate.

[0041] According to a preferred embodiment of the present inventi...

Embodiment 1

[0083] This example is used to illustrate the non-noble metal-based isobutane dehydrogenation catalyst and its preparation method.

[0084] (1) Preparation of rod-shaped mesoporous molecular sieve carrier

[0085] Add 4g (0.0007mol) template agent P123 to a solution containing 37% by weight of hydrochloric acid (16.4mL) and water (128mL), and stir at 40°C until P123 is completely dissolved; then add 8.86g (0.042mol) orthosilicon Ethyl acetate was added to the above solution, stirred at 40°C for 24h, then the resulting solution was transferred to a Teflon-lined reactor, crystallized at 150°C for 24h, followed by filtration and deionized water Washing 4 times, then performing suction filtration and drying to obtain the raw powder of mesoporous material; washing the raw powder of mesoporous material with ethanol under reflux conditions for 24 hours, removing the template agent, and obtaining rod-shaped mesoporous molecular sieve carrier A1.

[0086] (2) Preparation of initial no...

Embodiment 2

[0100] This example is used to illustrate the non-noble metal-based isobutane dehydrogenation catalyst and its preparation method.

[0101] (1) Preparation of rod-shaped mesoporous molecular sieve carrier

[0102] Add 4g (0.0007mol) template agent P123 to a solution containing 37% by weight of hydrochloric acid (16.4mL) and water (128mL), stir at 40°C until P123 is completely dissolved; then add 10.9g (0.0525mol) orthosilicon Ethyl acetate was added to the above solution, stirred at 40°C for 24h, then the resulting solution was transferred to a polytetrafluoroethylene-lined reactor, crystallized at 180°C for 20h, followed by filtration and deionized water Washing 4 times, then performing suction filtration and drying to obtain the raw powder of mesoporous material; washing the raw powder of mesoporous material with ethanol under reflux conditions for 24 hours to remove the template agent to obtain rod-shaped mesoporous molecular sieve A2.

[0103] (2) Preparation of non-preci...

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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 applications thereof. The method comprises the following steps: (a) providing mesoporous material raw powder; (b) carrying out template agent removal treatment on the mesoporous material raw powder to obtain a rod-like mesoporous molecular sieve carrier; (c)under an ultrasonic condition, loading a first active non-noble metal component and a second active non-noble metal component on the rod-like mesoporous molecular sieve carrier to obtain an initial non-noble metal isobutane dehydrogenation catalyst; and (d) vulcanizing the initial non-noble metal isobutane 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 a rod-shaped mesoporous molecular sieve, a non-precious metal-based isobutane dehydrogenation catalyst prepared by the method, and the obtained The application of the non-precious metal-based isobutane dehydrogenation catalyst in isobutane dehydrogenation to isobutene is described. 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 cat...

Claims

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Application Information

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IPC IPC(8): B01J29/04B01J35/10B01J37/02B01J37/20C07C5/333C07C11/09
CPCB01J29/044B01J29/041C07C5/3335B01J37/0018B01J37/0201B01J37/20B01J2229/18B01J35/635B01J35/638B01J35/647B01J35/615C07C11/09
Inventor 刘红梅亢宇薛琳
Owner CHINA PETROLEUM & CHEM CORP
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