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Non-noble metal propane dehydrogenation catalyst taking rod-like mesoporous molecular sieve as carrier, preparation method and applications thereof

A dehydrogenation catalyst, mesoporous molecular sieve technology, applied in molecular sieve catalyst, including molecular sieve catalyst, catalyst activation/preparation and other directions, can solve the problems of high preparation cost, environmental pollution, etc., and achieve high selectivity, high alkane conversion rate, good The effect of catalytic performance

Inactive Publication Date: 2020-05-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 rod-like mesoporous molecular sieve as carrier, preparation method and applications thereof
  • Non-noble metal propane dehydrogenation catalyst taking rod-like mesoporous molecular sieve as carrier, preparation method and applications thereof
  • Non-noble metal propane dehydrogenation catalyst taking rod-like mesoporous molecular sieve as carrier, preparation method and applications thereof

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Embodiment approach

[0032] Preferably, in step (a), the conditions of the mixed contact include: a temperature of 25-60° C., a time of more than 25 min, and a pH of 1-6. 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.

[0033] In the present invention, the amount of the templating agent and the silicon source can be varied within a wide range, for example, the molar ratio of the templating agent and the amount of the silicon source can be 1:10-90; preferably 1:1: 50-75.

[0034] In the present invention, the silicon source can be various silicon sources conventionally used in the field, preferably the silicon source is ethyl orthosilicate, methyl orthosilicate, propyl orthosilicate, sodium orthosilicate and At least one of the silica sols, more preferably ethyl orthosilicate.

[0035] According to a preferred embodiment of the present inven...

Embodiment 1

[0068] This example is used to illustrate the non-precious metal-based propane dehydrogenation catalyst and its preparation method.

[0069] (1) Preparation of rod-shaped mesoporous molecular sieve carrier

[0070] 4g (0.0007mol) of template P123 was added to a solution containing 37% by weight of hydrochloric acid (16.4mL) and water (128mL), and stirred at 40°C until P123 was completely dissolved; then 8.86g (0.042mol) of ortho-silicon was added. Ethyl acetate was added to the above solution, stirred at 40°C for 24h, then the resulting solution was transferred to a Teflon-lined reaction kettle, crystallized at 150°C for 24h, followed by filtration and deionized water. Wash 4 times, then perform suction filtration and drying to obtain raw mesoporous material powder; wash the raw mesoporous material powder with ethanol for 24 h under reflux conditions to remove the template agent to obtain rod-shaped mesoporous molecular sieve carrier C1.

[0071] (2) Preparation of non-precio...

Embodiment 2

[0083] This example is used to illustrate the non-precious metal-based propane dehydrogenation catalyst and its preparation method.

[0084] (1) Preparation of rod-shaped mesoporous molecular sieve carrier

[0085] 4g (0.0007mol) of template P123 was added to a solution containing 37% by weight of hydrochloric acid (16.4mL) and water (128mL), and stirred at 40°C until P123 was completely dissolved; then 10.9g (0.0525mol) of ortho-silicon was added. Ethyl acetate was added to the above solution, stirred at 40°C for 24h, then the resulting solution was transferred to a Teflon-lined reaction kettle, crystallized at 180°C for 20h, followed by filtration and deionized water. Wash 4 times, then perform suction filtration and drying to obtain the raw mesoporous material powder; wash the raw mesoporous material powder with ethanol for 24 h under reflux conditions to remove the template agent to obtain rod-shaped mesoporous molecular sieve C2.

[0086] (2) Preparation of non-precious ...

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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 applications thereof. The method comprises the following steps: (a) in the presence of a template agent, carrying out mixing contacting on a silicon source and an acid agent, and sequentially crystallizing, filtering and drying the mixture obtained after mixing contacting to obtain mesoporous material raw powder; (b) carrying out template agent removal treatment on the mesoporous material raw powder to obtain a rod-like mesoporous molecular sieve carrier;and (c) carrying out dipping treatment on the rod-like mesoporous molecular sieve carrier in a solution containing an active non-noble metal component precursor, and then sequentially carrying out solvent removal treatment, drying and roasting. The obtained non-noble metal propane dehydrogenation catalyst has good dehydrogenation activity, good selectivity and good stability.

Description

technical field [0001] The present 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 rod-shaped mesoporous molecular sieve, a non-precious metal-based propane dehydrogenation catalyst prepared by the method, and the non-precious metal-based propane dehydrogenation catalyst. Application of propane dehydrogenation catalyst in propane dehydrogenation to propylene. Background technique [0002] Propylene is the basic raw material of petrochemical industry and is mainly used to produce polypropylene, acrylonitrile, acetone, propylene oxide, acrylic acid and butanol. Half of the propylene supply comes from refinery by-products, and about 45% comes from steam cracking, with a small amount of other alternative technologies. In recent years, the demand for propylene has increased year by year, and traditional propylene production has been unable to meet the demand for p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/04B01J35/10B01J37/08C07C11/06C07C5/333
CPCB01J29/044B01J29/041B01J37/0018C07C5/3335C07C2529/04B01J2229/186B01J35/638B01J35/635B01J35/615B01J35/647C07C11/06Y02P20/52
Inventor 亢宇刘红梅刘东兵
Owner CHINA PETROLEUM & CHEM CORP
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