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Isobutane dehydrogenation catalyst, preparation method thereof and method for preparing isobutene through isobutane dehydrogenation

A dehydrogenation catalyst, isobutane technology, applied in catalyst activation/preparation, catalyst, molecular sieve catalyst, etc., can solve problems such as poor catalytic activity and stability, uneven dispersion of precious metal active components, and achieve conditions that are easy to control and reduce The risk of carbon deposition and the effect of reducing carbon deposition

Active Publication Date: 2019-11-26
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, preparation method thereof and method for preparing isobutene through isobutane dehydrogenation
  • Isobutane dehydrogenation catalyst, preparation method thereof and method for preparing isobutene through isobutane dehydrogenation
  • Isobutane dehydrogenation catalyst, preparation method thereof and method for preparing isobutene through isobutane dehydrogenation

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Embodiment approach

[0038] Preferably, in step (a), the mixing and contacting conditions include: a temperature of 25-60°C, and a time of 0.1-48h. 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 carrier

[0075] Add 1.5g (0.004mol) of template agent CTAB (cetyltrimethylammonium bromide) and 1.5ml (0.002mol) of polyethylene glycol octylphenyl ether (Triton-X100) to 37 In the solution of weight % hydrochloric acid (29.6g) and water (75g), stir until CTAB dissolves completely at 40 ℃; Then add 4.6g industrial sodium silicate in the above-mentioned solution, stir at 40 ℃ for 15 minutes, then The obtained solution was transferred to a polytetrafluoroethylene-lined reactor, 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 original powder of the mesoporous material ; Calcining the raw powder of the mesoporous material at 600° C. for 24 hours to remove the template agent to obtain spherical mesoporous molecular sieve material C1.

[0076] (2) Prepar...

Embodiment 2

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

[0098] (1) Preparation of carrier

[0099] Add 0.75g (0.002mol) of template agent CTAB (cetyltrimethylammonium bromide) and 3ml (0.004mol) of polyethylene glycol octylphenyl ether (Triton-X100) to 37 wt. % hydrochloric acid (29.6g) and water (75g) solution, stirred at 40 ° C until CTAB was completely dissolved; then added 4.35 g of industrial sodium silicate to the above solution, stirred 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 original powder of the mesoporous material; The raw powder of the mesoporous material was calcined at 600° C. for 24 hours to remove the template agent to obtain spherical mesoporous molecular sieve material C2.

[0100]...

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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 through isobutane dehydrogenation. The preparation method of the isobutane dehydrogenation catalyst comprises the following steps: (a) subjecting a template agent, a nonionic surfactant, an acid agent and industrial sodium silicateto be mixed and in contact under a solution condition to obtain a solution A; (b) crystallizing the solution A, and then sequentially conducting washing and drying to obtain mesoporous material raw powder; (c) carrying out template agent removal treatment on the mesoporous material raw powder to obtain a spherical mesoporous molecular sieve material carrier; and (d) carrying out thermal activationtreatment on the spherical mesoporous molecular sieve material carrier obtained in the step (c), then carrying out dipping treatment in a solution containing a Pt component precursor and a Zn component precursor, and then sequentially carrying out solvent removal treatment, drying and roasting. According to the method, the isobutane dehydrogenation catalyst with high catalytic activity can be synthesized by using a low-cost silicon source.

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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IPC IPC(8): B01J29/03B01J35/00B01J35/02B01J35/10B01J37/02C07C11/09C07C5/333
CPCB01J29/0325B01J37/0201C07C5/3337B01J2229/18C07C2529/03B01J35/394B01J35/618B01J35/40B01J35/635B01J35/643C07C11/09
Inventor 亢宇刘红梅刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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