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Isobutane dehydrogenation catalyst with spherical small-pore mesoporous silica gel composite material as supporter as well as preparation method and application of isobutane dehydrogenation catalyst

A dehydrogenation catalyst and isobutane technology, applied in the direction of carbon compound catalysts, catalysts, catalyst carriers, etc., can solve the problems of uneven dispersion of precious metal active components, poor catalytic activity and stability, and reduce the risk of carbon deposition and conditions Ease of control, enhanced selectivity effects

Inactive Publication Date: 2019-12-27
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 overcome the shortcomings of the existing isobutane dehydrogenation catalyst noble metal active components such as inhomogeneous dispersion, poor catalytic activity and stability, and to provide a carrier of isobutane on a small-pore mesoporous silica gel composite material. Alkane dehydrogenation catalyst and preparation method thereof, isobutane dehydrogenation catalyst prepared by the method and application of the isobutane dehydrogenation catalyst in isobutane dehydrogenation to isobutene, the method provided by the invention is easy to operate and environment-friendly And the cost is low, and the isobutane dehydrogenation catalyst prepared by this method can achieve better dehydrogenation activity, selectivity, stability and carbon deposition resistance under the condition that the precious metal loading is very low

Method used

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  • Isobutane dehydrogenation catalyst with spherical small-pore mesoporous silica gel composite material as supporter as well as preparation method and application of isobutane dehydrogenation catalyst
  • Isobutane dehydrogenation catalyst with spherical small-pore mesoporous silica gel composite material as supporter as well as preparation method and application of isobutane dehydrogenation catalyst
  • Isobutane dehydrogenation catalyst with spherical small-pore mesoporous silica gel composite material as supporter as well as preparation method and application of isobutane dehydrogenation catalyst

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Embodiment approach

[0037] 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.

[0038] In the present invention, the amount of the templating agent, the nonionic surfactant and the silicon source can vary within a wide range, such as the molar ratio of the template agent, the nonionic surfactant and the silicon source. Be (0.1-0.6): (0.1-0.5): 1; More preferably, the molar ratio of template agent, described nonionic surfactant and described silicon source consumption is (0.1-0.3): (0.1-0.3 ):1.

[0039] In the present invention, the silicon source can be various silicon sources conventionally used in the art, preferably the silicon source is ethyl orthosilicate, methyl orthosilicate, propyl orthosilicate, sodium orthosilicate ...

Embodiment 1

[0088] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0089] (1) Preparation of carrier

[0090] 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 a solution of weight % hydrochloric acid (29.6g) and water (75g), stir at 40°C until CTAB is completely dissolved; then add 4.35g (0.02mol) ethyl orthosilicate to the above solution, at 40°C After stirring for 15 minutes, the obtained solution was transferred to a polytetrafluoroethylene-lined reactor, crystallized at 120° C. for 24 h, then filtered and washed 4 times with deionized water, then suction filtered and dried to obtain Raw powder of mesoporous material; calcining the raw powder of mesoporous material at 600°C for 24 hours to remove template agent to obtain spherical mesoporous molecular sieve A1;

[0091] The water glass with a concentration of 15% by we...

Embodiment 2

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

[0111] (1) Preparation of carrier

[0112] 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 4.35g (0.02mol) ethyl orthosilicate to the above solution, stirred at 40°C 15 minutes, then the resulting solution was transferred to a polytetrafluoroethylene-lined reactor, crystallized at 100 ° C for 24 h, then filtered and washed with deionized water for 4 times, then suction filtered and dried to obtain a medium The raw powder of the pore 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 A2;

[0113] The water glass with a concentratio...

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Abstract

The invention relates to the field of catalysts, and discloses an isobutane dehydrogenation catalyst with a spherical small-pore mesoporous silica gel composite material as a supporter, and a preparation method and an application thereof; the method comprises the following steps: (a) preparing a spherical mesoporous molecular sieve; (b) preparing a silica gel filter cake; (c) mixing the sphericalmesoporous molecular sieve filter cake with silica gel, carrying out first ball milling and second ball milling, and carrying out spray drying; and (d) carrying out thermal activation treatment on thesupporter, 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 treatment and roasting treatment. 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 an isobutane dehydrogenation catalyst whose carrier is a small-porous mesoporous silica gel composite material, a preparation method thereof, an isobutane dehydrogenation catalyst prepared by the method, and the isobutane dehydrogenation catalyst Application of hydrogen catalyst in isobutane dehydrogenation to isobutene. 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 ). ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J35/08B01J35/10B01J32/00C07C5/333C07C11/09C01B39/04
CPCB01J29/0325C07C5/3337C01B39/04B01J2229/18C07C2529/03B01J35/51B01J35/638B01J35/643B01J35/635B01J35/633B01J35/69B01J35/647B01J35/615C07C11/09
Inventor 刘红梅亢宇薛琳
Owner CHINA PETROLEUM & CHEM CORP
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