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Isobutane dehydrogenation catalyst and preparation method thereof and method for preparing isobutene from isobutane dehydrogenation

A dehydrogenation catalyst and isobutane technology, which is applied in the field of isobutane dehydrogenation catalyst and isobutane dehydrogenation to isobutene, can solve the problems of poor catalytic activity and stability, uneven dispersion of precious metal active components, etc., and achieve stability Good performance, reduce the risk of carbon deposition, and inhibit the deactivation effect

Active Publication Date: 2021-11-19
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 kind of method for preparing isobutane dehydrogenation catalyst and by the method The prepared isobutane dehydrogenation catalyst and the method for preparing isobutene from isobutane dehydrogenation, the method provided by the invention is easy to operate, environmentally friendly and low in cost, and the isobutane dehydrogenation catalyst prepared by the method is supported on precious metals When the amount is very low, it can achieve better dehydrogenation activity, selectivity, stability and carbon deposition resistance

Method used

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  • Isobutane dehydrogenation catalyst and preparation method thereof and method for preparing isobutene from isobutane dehydrogenation
  • Isobutane dehydrogenation catalyst and preparation method thereof and method for preparing isobutene from isobutane dehydrogenation
  • Isobutane dehydrogenation catalyst and preparation method thereof and method for preparing isobutene from isobutane dehydrogenation

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

Embodiment 1

[0076] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0077] (1) Preparation of hexagonal mesoporous material carrier

[0078] 2g (1.4×10 -4 mol) template agent F108, 5.24g (0.03mol) of K 2 SO 4 Add 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°C for 24h; then transfer it to an agate-lined reactor, crystallize at 100°C for 24h, then filter and wash 4 times with deionized water, and then suction filter to obtain the raw material with a cubic center Im3m structure. powder; the raw powder having a cubic center of 1m3m structure was calcined in a muffle furnace at 400°C for 10 hours to remove the template agent to obtain the hexagonal mesoporous material carrier A1.

[0079] (2) Preparation of isobutane dehydrogenation catalyst

...

Embodiment 2

[0098] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0099] (1) Preparation of hexagonal mesoporous material carrier

[0100] 1.46g (1×10 -4 mol) template agent F108, 6.96g (0.04mol) 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 3.1g (0.015mol) of tetraethyl orthosilicate to the above solution, stir at 38°C for 15min, Stand still at 38°C for 24h; then transfer it to an agate-lined reactor, crystallize at 120°C for 30h, then filter and wash 4 times with deionized water, and then suction filter to obtain the raw material with a cubic center Im3m structure powder; the raw powder having a cubic center of 1m3m structure was calcined in a muffle furnace at 500°C for 15 hours to remove the template agent to obtain a hexagonal mesoporous material carrier A2.

[0101] (2) Preparation of isobutane dehydrogenation catalyst...

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Abstract

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst, a preparation method thereof and a method for preparing isobutene from isobutane dehydrogenation. The method for preparing the isobutane dehydrogenation catalyst comprises: (a) template agent, potassium sulfate, acid agent and tetraethyl orthosilicate are mixed and contacted, and the obtained mixture is crystallized and filtered to obtain a cubic center of Im3m The original powder of the hexagonal mesoporous material with the structure; (b) carrying out the release template treatment with the original powder of the hexagonal mesoporous material with the cubic center Im3m structure, to obtain the hexagonal mesoporous material carrier; (c) the hexagonal mesoporous material carrier; (c) the hexagonal mesoporous material carrier The porous material carrier is subjected to thermal activation treatment, then impregnated in a solution containing a Pt component precursor and a Zn component precursor, followed by solvent removal treatment, drying and calcination in sequence. The obtained isobutane dehydrogenation catalyst has good dehydrogenation activity and carbon deposition resistance.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a method for preparing an isobutane dehydrogenation catalyst, an isobutane dehydrogenation catalyst prepared by the method and a method for preparing 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 cracking (FCC) unit and the by-product tert-butanol (TAB ). [0003] In recent years, with the development and utilization of isobutene downstream products, the demand for isobutene has been in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/60B01J35/02B01J35/10B01J37/02B01J37/08C07C5/333C07C11/09
CPCB01J23/60B01J35/023B01J35/1023B01J35/1033B01J35/1061B01J37/0205B01J37/0207B01J37/0236B01J37/08C07C5/3337C07C11/09
Inventor 亢宇刘红梅刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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