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

A dehydrogenation catalyst and non-precious metal technology, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, heterogeneous catalyst chemical elements, etc., can solve the problems of high preparation cost and environmental pollution, Achieve the effects of high selectivity, high alkane conversion rate and 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 hexagonal mesoporous material as carrier, preparation method and application thereof
  • Non-noble metal isobutane dehydrogenation catalyst taking hexagonal mesoporous material as carrier, preparation method and application thereof
  • Non-noble metal isobutane dehydrogenation catalyst taking hexagonal mesoporous material as carrier, preparation method and application thereof

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Embodiment approach

[0041] 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 10-240 min, 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.

[0042] According to a preferred embodiment of the present invention, the process of mixing and contacting the template agent, potassium sulfate, acid agent and orthosilicate comprises: mixing the template agent triblock copolymer polyoxyethylene-polyoxypropylene-polyoxyethylene F108 Added to the aqueous solution of hydrochloric acid, according to the molar feed ratio, triblock copolymer polyoxyethylene-polyoxypropylene-polyoxyethylene F108:potassium sulfate:water:hydrogen chloride=1:200-400:10000-30000:100-900 , stirred at a tempera...

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 hexagonal mesoporous material carrier

[0086] 2g (1.4×10 -4 mol) template agent F108, 5.24g (0.03mol) of K 2 SO 4Add it to 60g of hydrochloric acid solution with an equivalent concentration of 2 (2N), stir at 38°C until F108 is completely dissolved; add 4.2g (0.02mol) of tetraethyl orthosilicate to the above solution, stir at 38°C for 15min, Stand at 38 ℃ for 24h; then add 100g deionized water to the above mixed solution for dilution, then filter, and wash 4 times with deionized water, then suction filter to obtain the former powder of the hexagonal mesoporous material with a cubic core 1m3m structure; The raw powder with a cube-centered Im3m structure was calcined in a muffle furnace at 400° C. for 12 hours to remove the template agent to obtain the hexagonal mesoporous material A1. Then, the hexagonal mesoporous m...

Embodiment 2

[0102] This example is used to illustrate the non-noble metal-based isobutane dehydrogenation catalyst and its preparation method.

[0103] (1) Preparation of hexagonal mesoporous material carrier

[0104] 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; add 3.1g (0.015mol) of tetraethyl orthosilicate to the above solution, stir at 38°C for 15min, and at 40°C Leave standstill 20h; Then add 100g deionized water dilution in above-mentioned mixed solution, then filter, and wash 4 times with deionized water, then suction filtration obtains the former powder of hexagonal mesoporous material with cubic core 1m3m structure; The above-mentioned obtained The raw powder of the hexagonal mesoporous material with a cubic center Im3m structure was calcined in a muffle furnace at 600° C. for 8 hours to remove the template agent to obtain the hexagonal mes...

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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 hexagonal mesoporous material raw powder; (b) carrying out template agent removal treatment and thermal activation treatment on the mesoporous material raw powder to obtain a hexagonal 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 hexagonal mesoporous material 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 supported by a hexagonal mesoporous material, 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 catalytic crack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J23/06B01J37/20B01J37/34C07C5/333C07C11/09
CPCB01J23/78B01J23/06B01J23/002C07C5/3332B01J2523/00B01J35/617B01J35/635B01J35/647C07C11/09B01J2523/12B01J2523/41B01J2523/842B01J2523/22B01J2523/27B01J2523/13B01J2523/847
Inventor 刘红梅亢宇薛琳
Owner CHINA PETROLEUM & CHEM CORP
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