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

A dehydrogenation catalyst and isobutane technology, 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 good catalytic performance

Active Publication Date: 2021-12-21
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

Examples

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Effect test

Embodiment 1

[0077] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0078] (1) Preparation of spherical silica gel mesoporous silica composite material (carrier)

[0079] Add 2g of triblock copolymer template agent P123 and 15g of N,N-dimethylformamide (DMF) into a solution of 11.2g of 37% hydrochloric acid and 64mL of water, mix and stir until P123 is completely dissolved; then add 4.45g Ethyl orthosilicate was slowly added dropwise to the above solution at a rate of 1 g / min, stirred at a temperature of 40 ° C for 1 h at a mechanical stirring rate of 350 r / min, and then kept at a constant temperature, and then 1 g of commercially available ES955 Silica gel (GRACE company) was slowly added dropwise to the above mixture at a rate of 1 g / min, and the reaction was stirred for 40 h, and the resulting product was transferred to a polytetrafluoroethylene-lined reactor for crystallization at 120 ° C for 24 h, followed by Suction filtration ...

Embodiment 2

[0100] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0101] (1) Preparation of spherical silica gel mesoporous silica composite material (carrier)

[0102]Add 2g triblock copolymer template agent P123 and 20g N,N-dimethylformamide (DMF) to a solution of 11.2g 37% hydrochloric acid and 64mL water, mix and stir until P123 is completely dissolved; then add 6.68g Ethyl orthosilicate was slowly added dropwise to the above solution at a rate of 1 g / min, stirred for 1 h at a temperature of 50°C and a mechanical stirring rate of 350 r / min, and then kept at a constant temperature, and then 1.2 g of commercially available ES955 silica gel (GRACE company) was slowly added dropwise to the above-mentioned mixture at a rate of 1 g / min, and stirred for 40 h, and the resulting product was transferred to a polytetrafluoroethylene-lined reactor for crystallization at 150 ° C for 24 h, followed by Carry out suction filtration and wash wi...

Embodiment 3

[0110] This example is used to illustrate the isobutane removal catalyst and its preparation method.

[0111] Add 2g of triblock copolymer template agent P123 and 18g of N,N-dimethylformamide (DMF) to a solution of 11.2g of 37% hydrochloric acid and 64mL of water, mix and stir until P123 is completely dissolved; then add 5.34g Ethyl orthosilicate was slowly added dropwise to the above solution at a rate of 1 g / min, stirred for 1 h at a temperature of 50°C and a mechanical stirring rate of 350 r / min, and then kept at a constant temperature, and then 1.5 g of commercially available ES955 silica gel (GRACE company) was slowly added dropwise to the above-mentioned mixture at a rate of 1 g / min, and stirred for 40 h, and the resulting product was transferred to a polytetrafluoroethylene-lined reactor for crystallization at 30° C. for 72 h, followed by Carry out suction filtration and wash with deionized water 4 times, then carry out centrifugal spray drying at 300° C. at a rotationa...

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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) mixing a template agent, N, N-dimethylformamide and hydrochloric acid until the solids are fully dissolved; (b) mixing the solution obtained in step (a) with silicon (c) the product obtained in step (b) is contacted with silica gel for the second time, and the mixture obtained after the second contact is successively crystallized, filtered, washed and dried to obtain silica gel mesoporous dioxide Silicon composite raw powder; (d) remove the template agent in the product obtained in step (c) to obtain a silica gel mesoporous silica composite material carrier; (e) prepare the silica gel mesoporous silica composite material obtained in step (d) The carrier contains Pt component precursor and Zn component. The isobutane dehydrogenation catalyst prepared by the method has better 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): B01J23/60B01J35/02B01J35/08B01J35/10C07C5/333C07C11/09
CPCB01J23/60B01J35/08B01J23/002B01J35/1023B01J35/1047B01J35/1061B01J35/1042B01J35/023C07C5/3332C07C2523/60C07C11/09
Inventor 亢宇刘红梅刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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