Non-noble metal propane dehydrogenation catalyst taking modified spherical doughnut mesoporous material silica gel composite material as carrier, preparation method and application thereof

A dehydrogenation catalyst and non-precious metal technology, applied in metal/metal oxide/metal hydroxide catalyst, carbon compound catalyst, catalyst activation/preparation, etc., can solve the problems of environmental pollution, high preparation cost, etc., and achieve high selectivity , Reduce preparation cost, good catalyst stability

Inactive Publication Date: 2020-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of non-precious metal propane dehydrogenation catalyst and its preparation method and application in order to overcome the defect that the preparation cost of non-noble metal propane dehydrogenation catalyst is relatively high and easy to cause environmental pollution in the prior art. Dehydrogenation catalysts can achieve better dehydrogenation activity, selectivity and stability without using noble metals and heavily polluting metal components

Method used

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  • Non-noble metal propane dehydrogenation catalyst taking modified spherical doughnut mesoporous material silica gel composite material as carrier, preparation method and application thereof
  • Non-noble metal propane dehydrogenation catalyst taking modified spherical doughnut mesoporous material silica gel composite material as carrier, preparation method and application thereof
  • Non-noble metal propane dehydrogenation catalyst taking modified spherical doughnut mesoporous material silica gel composite material as carrier, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0080] This example is used to illustrate the non-noble metal-based propane dehydrogenation catalyst and its preparation method.

[0081] (1) Preparation of spherical donut mesoporous silica gel composites

[0082] Add 2g of triblock copolymer template agent P123 and 15g of N,N-dimethylformamide (DMF) into a solution of 11.2g of 37% hydrochloric acid and 64mL of water, mix and stir until P123 is completely dissolved; then add 4.45g Ethyl orthosilicate was slowly added dropwise to the above solution at a rate of 1 g / min, stirred for 24 hours at a temperature of 40°C with a mechanical stirring rate of 350 r / min, and then the obtained solution was transferred to a polytetrafluoroethylene lining crystallize at 90°C for 24 hours, then filter and wash with deionized water for 4 times until the pH of the donut mesoporous material filter cake is 7, and then suction filter to obtain a two-dimensional hexagonal pore distribution structure Donut mesoporous material filter cake A1;

[0...

Embodiment 2

[0099] This example is used to illustrate the non-noble metal-based propane dehydrogenation catalyst and its preparation method.

[0100] (1) Preparation of spherical donut mesoporous silica gel composites

[0101] Add 2g of triblock copolymer template agent P123 and 17.6g of N,N-dimethylformamide (DMF) to a solution of 11.2g of 37% hydrochloric acid and 64mL of water, mix and stir until P123 is completely dissolved; then add 6.68 Add 1 g of tetraethyl orthosilicate slowly to the above solution dropwise at a rate of 1 g / min, stir for 24 h at a temperature of 40°C with a mechanical stirring rate of 350 r / min, and then transfer the obtained solution into polytetrafluoroethylene In a lined reactor, crystallize at 120°C for 20h, then filter and wash with deionized water 4 times until the pH of the donut mesoporous material filter cake is 7, and then suction filter to obtain a two-dimensional hexagonal pore distribution Structured donut mesoporous material filter cake A2;

[0102...

Embodiment 3

[0115] This example is used to illustrate the non-noble metal-based propane dehydrogenation catalyst and its preparation method.

[0116] (1) Preparation of spherical donut mesoporous silica gel composites

[0117] Add 2g of triblock copolymer template agent P123 and 7.56g of N,N-dimethylformamide (DMF) into a solution of 11.2g of 37% hydrochloric acid and 64mL of water, mix and stir until P123 is completely dissolved; then add 3.6 Add 1 g of tetraethyl orthosilicate slowly to the above solution dropwise at a rate of 1 g / min, stir for 24 h at a temperature of 40°C with a mechanical stirring rate of 350 r / min, and then transfer the obtained solution into polytetrafluoroethylene In a lined reactor, crystallize at 100°C for 22h, then filter and wash with deionized water 4 times until the pH of the bagel mesoporous material filter cake is 7, and then suction filter to obtain a two-dimensional hexagonal pore distribution Structured donut mesoporous material filter cake A3;

[011...

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Abstract

The invention relates to the field of catalysts, and discloses a non-noble metal propane dehydrogenation catalyst, a preparation method and application thereof. The method for preparing the non-noblemetal propane dehydrogenation catalyst comprises the following steps: (a) preparing a doughnut mesoporous material filter cake; (b) preparing a silica gel filter cake; (c) carrying out mixing and ball-milling on the doughnut mesoporous material filter cake and the silica gel filter cake, pulping the solid powder obtained by ball-milling with water, performing spray drying, and removing the template agent in the obtained product to obtain a spherical doughnut mesoporous material silica gel composite material; (d) under an ultrasonic condition, modifying the composite material by using an aqueous solution containing sulfate and / or sulfite to obtain a modified spherical doughnut mesoporous material silica gel composite material carrier; and (e) impregnating and loading an active non-noble metal component on the modified spherical doughnut mesoporous material silica gel composite material carrier. The obtained non-noble metal propane dehydrogenation catalyst has good dehydrogenation activity, good selectivity and good stability.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a method for preparing a non-precious metal-based propane dehydrogenation catalyst whose carrier is a modified spherical donut mesoporous silica gel composite material and a non-precious metal-based propane dehydrogenation catalyst prepared by the method. And the application of the non-noble metal propane dehydrogenation catalyst in propane dehydrogenation to propylene. Background technique [0002] Propylene is the basic raw material of petrochemical industry, mainly used in the production of polypropylene, acrylonitrile, acetone, propylene oxide, acrylic acid and butyl octanol. Half of the supply of propylene comes from refinery by-products, another about 45% comes from steam cracking, and a small amount of other alternative technologies. In recent years, the demand for propylene has been increasing year by year, and the traditional propylene production can no longer meet the demand f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/755B01J23/06B01J32/00B01J35/10B01J37/08B01J37/02C07C11/06C07C5/333
CPCB01J23/745B01J23/755B01J23/06B01J21/08B01J23/002B01J37/0018B01J37/0207C07C5/3332C07C2523/745C07C2523/755C07C2523/06B01J35/617B01J35/638B01J35/635B01J35/615B01J35/647C07C11/06Y02P20/52
Inventor 亢宇刘红梅薛琳
Owner CHINA PETROLEUM & CHEM CORP
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