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Isobutane dehydrogenation catalyst and preparation method thereof, and method for producing 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 the effect of easy control of conditions

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

Examples

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Effect test

Embodiment 1

[0075] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0076] (1) Preparation of carrier

[0077] Hexadecyltrimethylammonium bromide and tetraethyl orthosilicate are added into the ammonia solution with a concentration of 25% by weight, wherein the addition of ethyl orthosilicate is 1g, and according to the molar feed ratio, ethyl orthosilicate Ester: cetyltrimethylammonium bromide: ammonia water (25%): deionized water = 1: 0.37: 2.8: 142, stirred at 80°C until dissolved, suction filtered the solution and obtained mesoporous material Cake, washing the filter cake to a pH of 7 to obtain a mesoporous molecular sieve filter cake A1 with a two-dimensional hexagonal pore structure;

[0078] Concentration is 15% by weight of water glass and concentration of 12% by weight of sulfuric acid solution and n-butanol, and according to water glass: sulfuric acid: n-butanol weight ratio = 5: 1: 1 fully reacted at 30 ℃ for 1.5h, The pH...

Embodiment 2

[0105] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0106] (1) Preparation of carrier

[0107] Hexadecyltrimethylammonium bromide and tetraethyl orthosilicate are added into the ammonia solution with a concentration of 25% by weight, wherein the addition of ethyl orthosilicate is 1g, and according to the molar feed ratio, ethyl orthosilicate Ester: cetyltrimethylammonium bromide: ammonia water (25%): deionized water = 1: 0.5: 3.5: 150, stirred at 80°C until dissolved, suction filtered the solution to obtain a mesoporous material filter Cake, washing the filter cake to a pH of 7 to obtain a mesoporous molecular sieve filter cake A2 with a two-dimensional hexagonal pore structure;

[0108] Concentration is 15% by weight of water glass and concentration of 12% by weight of sulfuric acid solution and n-butanol, and according to water glass: sulfuric acid: n-butanol weight ratio = 6: 1: 1 to fully react at 60 ℃ for 1h, use...

Embodiment 3

[0118] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0119] (1) Preparation of carrier

[0120] Hexadecyltrimethylammonium bromide and tetraethyl orthosilicate are added into the ammonia solution with a concentration of 25% by weight, wherein the addition of ethyl orthosilicate is 1g, and according to the molar feed ratio, ethyl orthosilicate Ester: Hexadecyltrimethylammonium bromide: Ammonia water (25%): Deionized water = 1:0.4:3:130, stirred at 60°C until dissolved, suction filtered the solution and obtained mesoporous material filter Cake, washing the filter cake to a pH of 7 to obtain a mesoporous molecular sieve filter cake A3 with a two-dimensional hexagonal pore structure;

[0121] Concentration is that the water glass of 15% by weight and the concentration of 12% by weight of sulfuric acid solution and n-butanol, and by water glass: sulfuric acid: n-butanol weight ratio=3:1:1 fully react at 10 ℃ for 5h, use Su...

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Abstract

The invention relates to the field of catalysts, and discloses 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. The method for preparing the isobutane dehydrogenation catalyst comprises: (a) preparing a mesoporous molecular sieve filter cake; (b) preparing a silica gel filter cake; (c) mixing the mesoporous molecular sieve filter cake and silica gel filter cake at high temperature Ball milling is carried out in an aluminum ceramic tank, and the solid powder obtained after ball milling is slurried with water and then spray-dried, and then the template agent in the obtained product is removed to obtain a spherical double-hole aluminum-containing silica gel mesoporous molecular sieve composite material carrier (d) impregnating the aforementioned spherical double-hole aluminum-containing silica gel mesoporous molecular sieve composite carrier in a solution containing a Pt component precursor and a Zn component precursor, followed by solvent removal, drying and calcination. The obtained isobutane dehydrogenation catalyst has good compressive strength, 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): B01J29/03B01J35/10C07C5/333C07C11/09
CPCB01J29/0325C07C5/3337C07C2529/03B01J35/615B01J35/635B01J35/643B01J35/647C07C11/09
Inventor 亢宇刘红梅刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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