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Isobutane dehydrogenation catalyst using spherical double-mesoporous zeolite composite material as carrier, preparation method and applications thereof

A dehydrogenation catalyst and composite material technology, applied in the field of catalysts, can solve the problems of uneven dispersion of noble metal active components, poor catalytic activity and stability, etc., and achieve the effects of reducing the risk of carbon deposition, good catalytic performance and improving selectivity

Inactive Publication Date: 2020-01-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 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 using spherical double-mesoporous zeolite composite material as carrier, preparation method and applications thereof
  • Isobutane dehydrogenation catalyst using spherical double-mesoporous zeolite composite material as carrier, preparation method and applications thereof
  • Isobutane dehydrogenation catalyst using spherical double-mesoporous zeolite composite material as carrier, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0084] (1) Preparation of carrier

[0085]Add 1g (0.0002mol) of triblock copolymer surfactant P123 and 1.69g (0.037mol) of ethanol to 28ml of acetic acid and sodium acetate buffer solution with a pH value of 4, and stir at 15°C until P123 is completely dissolved. Add 6g (0.053mol) trimethylpentane to the obtained solution afterwards, stir at 15°C for 8h, then add 2.13g (0.014mol) tetramethoxysilane to it, at 15°C, the pH value is 4.5 Stirred under conditions for 20h, then transferred the obtained solution to a polytetrafluoroethylene-lined reactor, crystallized at 60°C for 24h, then filtered and washed 4 times with deionized water, and then suction filtered to obtain a one-dimensional Mesoporous molecular sieve material filter cake A1 with hexagonal single-pore distribution structure;

[0086] Concentration is that the water glass of 15% by weight and the sulfuric a...

Embodiment 2

[0108] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0109] (1) Preparation of carrier

[0110] Add 1g (0.0002mol) of triblock copolymer surfactant P123 and 1.84g (0.04mol) of ethanol to 28ml of acetic acid and sodium acetate buffer solution with a pH value of 5, and stir at 15°C until P123 is completely dissolved. Then add 9.12g (0.08mol) trimethylpentane to the resulting solution, stir at 15°C for 8h, then add 3.04g (0.02mol) tetramethoxysilane to it, at 25°C, pH value is 5.5 Stirring for 15h under the condition of , then transferring the obtained solution to a polytetrafluoroethylene-lined reactor, crystallizing at 100°C for 10h, then filtering and washing with deionized water for 4 times, and then suction filtering to obtain a Mesoporous molecular sieve material filter cake A2 with single-dimensional hexagonal channel distribution structure;

[0111] Concentration is that the water glass of 15% by weight and the s...

Embodiment 3

[0121] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0122] (1) Preparation of carrier

[0123] Add 1g (0.0002mol) of triblock copolymer surfactant P123 and 2.76g (0.06mol) of ethanol to 28ml of acetic acid and sodium acetate buffer solution with a pH value of 3, and stir at 15°C until P123 is completely dissolved. Then add 5.7g (0.05mol) trimethylpentane to the resulting solution, stir at 15°C for 8h, then add 2.13g (0.014mol) tetramethoxysilane, at 40°C, pH value is 3.5 Stirring for 10 h under the condition of , then transferring the obtained solution to a polytetrafluoroethylene-lined reactor, crystallizing at 40 ° C for 40 h, then filtering and washing with deionized water for 4 times, and then suction filtering to obtain a Mesoporous molecular sieve material filter cake A3 with a single-pore distribution structure of six-dimensional hexagonal channels;

[0124]The concentration is that the water glass of 15% by w...

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Abstract

The invention relates to the field of catalysts, and discloses a method for preparing an isobutane dehydrogenation catalyst, the isobutane dehydrogenation catalyst prepared by the method, and a methodfor preparing isobutene through dehydrogenation of isobutane. The method for preparing the isobutane dehydrogenation catalyst comprises: (a) preparing a mesoporous material filter cake with a one-dimensional hexagonal structure; (b) preparing a silica gel filter cake; (c) mixing the mesoporous material filter cake, the silica gel filter cake and zeolite, carrying out ball milling, pulping the solid powder obtained after ball milling with water, carrying out spray drying, and removing the template agent in the obtained product to obtain a spherical double-mesoporous zeolite composite materialcarrier; and (d) carrying out dipping treatment on the spherical double-mesoporous zeolite composite material carrier obtained in the step (c) in a solution containing a Pt component precursor and a Zn component precursor, and then sequentially carrying out solvent removal treatment, drying and roasting. The obtained isobutane dehydrogenation catalyst of the invention has good 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 Applications(China)
IPC IPC(8): B01J29/03B01J35/00B01J35/02B01J35/10B01J37/02C07C11/09C07C5/333
CPCB01J29/0325B01J37/0201C07C5/3337B01J2229/18C07C2529/03B01J35/394B01J35/40B01J35/635B01J35/638B01J35/647B01J35/615C07C11/09
Inventor 亢宇刘红梅薛琳
Owner CHINA PETROLEUM & CHEM CORP
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