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

A technology of dehydrogenation catalyst and isobutane, which is applied in the direction of catalyst activation/preparation, catalyst, molecular sieve catalyst, etc., can solve the problems of poor catalytic activity and stability, uneven dispersion of noble metal active components, etc., and achieve high selectivity and low The risk of carbon deposition and the effect of low carbon deposition

Active Publication Date: 2022-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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

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Embodiment approach

[0038] Preferably, in step (a), the conditions of the mixed contact include: a temperature of 25-60° C. and a time of 0.1-48 h. 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 consumption of described templating agent, nonionic surfactant and industrial sodium silicate can change in a wide range, for example described template agent, described nonionic surfactant and described industrial sodium silicate The molar ratio of the amount used is 0.1-0.6:0.1-0.5:1; more preferably, the molar ratio of the template agent, the nonionic surfactant and the industrial sodium silicate is 0.1-0.3:0.1-0.3: 1.

[0040] In the present invention, the industrial sodium silicate refers to the industrial sodium silicate having the parameters specified in GB / T 4209-2008.

[0041] Preferably, in the step (b...

Embodiment 1

[0073] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0074] (1) Preparation of the carrier

[0075] 1.5 g (0.004 mol) of templating agent CTAB (hexadecyl trimethyl ammonium bromide) and 1.5 ml (0.002 mol) of polyethylene glycol octyl phenyl ether (Triton-X100) were added to the solution containing 37 In the solution of wt% hydrochloric acid (29.6g) and water (75g), stir at 40°C until CTAB is completely dissolved; then add 4.6g of industrial sodium silicate to the above solution, stir at 40°C for 15 minutes, and then The obtained solution was transferred to a polytetrafluoroethylene-lined reaction kettle, crystallized at 120°C for 24 hours, then filtered and washed with deionized water for 4 times, then suction filtered and dried to obtain the raw mesoporous material powder ; The mesoporous material raw powder was calcined at 600° C. for 24 h, the template agent was removed, and the spherical mesoporous molecular sieve ...

Embodiment 2

[0097] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0098] (1) Preparation of the carrier

[0099] 0.75 g (0.002 mol) of templating agent CTAB (hexadecyl trimethyl ammonium bromide) and 3 ml (0.004 mol) of polyethylene glycol octyl phenyl ether (Triton-X100) were added to a solution containing 37 wt. % hydrochloric acid (29.6g) and water (75g), stir at 40°C until CTAB is completely dissolved; then add 4.35g of industrial sodium silicate to the above solution, stir at 40°C for 15 minutes, and then The obtained solution was transferred to a polytetrafluoroethylene-lined reaction kettle, crystallized at 100° C. for 24 hours, then filtered and washed with deionized water for 4 times, then suction filtered and dried to obtain the raw mesoporous material powder; The mesoporous material raw powder was calcined at 600° C. for 24 hours to remove the template agent to obtain spherical mesoporous molecular sieve material C2.

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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 preparation method of the isobutane dehydrogenation catalyst comprises the following steps: (a) under solution conditions, mixing and contacting template agent, nonionic surfactant, acid agent and industrial sodium silicate to obtain solution A; (b) mixing The solution A is crystallized, washed and dried in sequence to obtain the raw powder of the mesoporous material; (c) subjecting the raw powder of the mesoporous material to a release agent treatment to obtain a spherical mesoporous molecular sieve material carrier; (d) The spherical mesoporous molecular sieve material carrier obtained in step (c) is subjected to thermal activation treatment, followed by immersion treatment in a solution containing a Pt component precursor and a Zn component precursor, and then solvent removal treatment, drying and calcination are performed sequentially. The method can utilize a low-cost silicon source to synthesize an isobutane dehydrogenation catalyst with high catalytic activity.

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 isobutane dehydrogenation to isobutene. Background technique [0002] Isobutylene is a very important organic chemical raw material, mainly used for 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 sources of isobutene are the by-product C4 fraction from naphtha steam cracking to ethylene unit, the by-product C4 fraction from refinery fluid catalytic cracking (FCC) unit, and the by-product tert-butanol (TAB) from the Halcon process propylene oxide synthesis. ). [0003] In recent years, with the development and utilization of downstream prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03B01J35/00B01J35/02B01J35/10B01J37/02C07C11/09C07C5/333
CPCB01J29/0325B01J35/1028B01J35/1042B01J35/1057B01J35/023B01J35/0066B01J37/0201C07C5/3337B01J2229/18C07C2529/03C07C11/09
Inventor 亢宇刘红梅刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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