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Isobutane dehydrogenation catalyst using chlorite composite material with three-dimensional cubic and hexagonal pore channel structures as carrier, preparation method and applications thereof

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 uneven dispersion of precious metal active components, poor catalytic activity and stability, etc., and achieve reduction Risk of carbon deposition, good catalytic performance, and good product repeatability

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 chlorite composite material with three-dimensional cubic and hexagonal pore channel structures as carrier, preparation method and applications thereof
  • Isobutane dehydrogenation catalyst using chlorite composite material with three-dimensional cubic and hexagonal pore channel structures as carrier, preparation method and applications thereof
  • Isobutane dehydrogenation catalyst using chlorite composite material with three-dimensional cubic and hexagonal pore channel structures as carrier, preparation method and applications thereof

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preparation example Construction

[0050] According to the method for preparing an isobutane dehydrogenation catalyst provided by the present invention, in step (b), the conditions for contacting the water glass with the inorganic acid may include: the temperature may be 10-60°C, preferably 20-40°C; The time can be 1-5 hours, preferably 1.5-3 hours, and the pH value is 2-4. In order to be more conducive to the uniform mixing between the various substances, the contact between the water glass and the inorganic acid is preferably carried out under stirring conditions.

[0051] According to the present invention, the water glass is an aqueous solution of sodium silicate conventional in the art, and its concentration may be 10-50% by weight, preferably 12-30% by weight.

[0052] According to the present invention, the inorganic acid may be one or more of sulfuric acid, nitric acid and hydrochloric acid. The mineral acids can be used in pure form or in the form of their aqueous solutions. The amount of the inorgan...

Embodiment 1

[0086] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0087] (1) Preparation of spherical double mesoporous chlorite composite carrier

[0088] Dissolve 6g (0.001mol) of triblock copolymer surfactant P123 in 10ml of hydrochloric acid aqueous solution with a pH value of 4 and 220ml of deionized aqueous solution, stir for 4h until P123 dissolves to form a transparent solution, and then add it to the transparent solution Add 6g (0.08mol) of n-butanol and stir for 1h, then place it in a water bath at 40°C, slowly add 12.9g (0.062mol) of tetraethyl orthosilicate into the solution, and keep the temperature at about 40°C. Stir for 24 hours at a pH value of 4.5, then hydrothermally treat at 100°C for 24 hours, then filter and wash with deionized water for 4 times, and then suction filter to obtain filter cake A1 of No. 1 mesoporous molecular sieve material with three-dimensional cubic channels ;

[0089]Hexadecyltrimethylammon...

Embodiment 2

[0113] This example is used to illustrate the isobutane dehydrogenation catalyst and its preparation method.

[0114] (1) Preparation of spherical double mesoporous chlorite composite carrier

[0115] Dissolve 6g (0.001mol) of triblock copolymer surfactant P123 in 10ml of hydrochloric acid aqueous solution with a pH value of 4 and 220ml of deionized aqueous solution, stir for 4h until P123 dissolves to form a transparent solution, and then add it to the transparent solution Add 6.7g (0.09mol) n-butanol and stir for 1h, then place it in a water bath at 40°C, slowly add 10.4g (0.05mol) ethyl tetrasilicate to the solution dropwise, and keep the temperature at about 40°C , pH value of 5 under the condition of stirring for 24 hours, then hydrothermal treatment at 90 ° C for 36 hours, followed by filtration and washing with deionized water for 4 times, and then suction filtration to obtain the filter cake of No. 1 mesoporous molecular sieve material with three-dimensional cubic chan...

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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 first mesoporous material filter cake with a three-dimensional cubic pore channel structure and a second mesoporous material filter cake with a two-dimensional hexagonal pore channel structure; (b) preparing a silica gel filter cake; (c) mixing the first mesoporous material filter cake, the second mesoporous material filter cake, the silica gel filter cake and chlorite, and sequentially carrying out ball milling, pulping, drying and templateagent removal to obtain a spherical double-mesoporous chlorite composite material carrier; and (d) carrying out dipping treatment on the obtained spherical double-mesoporous chlorite composite material carrier 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
CPCB01J29/0325B01J37/0201C07C5/3337B01J2229/18C07C2529/03B01J35/394B01J35/40B01J35/638B01J35/647B01J35/615C07C11/09
Inventor 刘红梅亢宇薛琳
Owner CHINA PETROLEUM & CHEM CORP
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