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Catalyst for propane dehydrogenation and preparation method thereof, and method for preparing propylene from propane through dehydrogenation

A propane dehydrogenation and catalyst technology, applied in catalyst activation/preparation, catalyst, molecular sieve catalyst, etc., can solve the problems of low selectivity of propane dehydrogenation active propylene, small pore size and pore volume, unstable mesoporous structure, etc. Achieve the effect of low preparation cost, simple preparation process and easy control of conditions

Active Publication Date: 2019-02-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the disadvantages of small pore size and pore volume of mesoporous material carriers and unstable mesoporous structure in the prior art, which further lead to low propane dehydrogenation activity, low propylene selectivity and poor stability

Method used

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  • Catalyst for propane dehydrogenation and preparation method thereof, and method for preparing propylene from propane through dehydrogenation
  • Catalyst for propane dehydrogenation and preparation method thereof, and method for preparing propylene from propane through dehydrogenation
  • Catalyst for propane dehydrogenation and preparation method thereof, and method for preparing propylene from propane through dehydrogenation

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Embodiment approach

[0043] The present invention has no particular limitation on the conditions of the mixing and contacting, for example, the conditions of the mixing and contacting may include: a temperature of 25-60° C., a time of 10-72 hours, and a pH value of 1-7. 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.

[0044] In the present invention, the crystallization conditions are not particularly limited. For example, the crystallization conditions may include: a temperature of 30-150°C, preferably 90-150°C; a time of 10-72h, preferably 10 -40h. According to a preferred embodiment, the crystallization is carried out by hydrothermal crystallization.

[0045] In the present invention, in the above-mentioned process of preparing the hexagonal mesoporous material, the process of obtaining the raw powder of the hexagonal mesoporous material ...

Embodiment 1

[0057] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0058] (1) Preparation of carrier

[0059] 2g (1.4×10 -4mol) template agent F108, 5.24g (0.03mol) of K 2 SO 4 Stir with 60g of hydrochloric acid solution with a normality of 2 (2N) at 38°C until F108 is completely dissolved;

[0060] Add 4.2g (0.02mol) of tetraethyl orthosilicate to the above solution, stir at 38°C for 15min, and stand at 38°C for 24h;

[0061] Then it was transferred to an agate-lined reactor, crystallized at 100°C for 24 hours, then filtered and washed 4 times with deionized water, and then suction filtered to obtain the raw powder cake of hexagonal mesoporous materials;

[0062] The 30g hexagonal mesoporous material raw powder filter cake obtained by the above-mentioned suction filtration is put into a 100ml ball mill jar, wherein, the material of the ball mill jar is polytetrafluoroethylene, the material of the ball mill is agate, the diameter o...

Embodiment 2

[0091] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0092] (1) Preparation of carrier

[0093] 1.46g (1×10 -4 mol) template agent F108, 6.96g (0.04mol) of K 2 SO 4 Stir with 60g of hydrochloric acid solution with a normality of 2 (2N) at 38°C until F108 is completely dissolved;

[0094] Add 3.1g (0.015mol) of tetraethyl orthosilicate to the above solution, stir at 38°C for 15min, and stand at 38°C for 24h;

[0095] Then transfer it to an agate-lined reaction kettle, crystallize at 120°C for 30h, then filter and wash 4 times with deionized water, and then suction filter to obtain the original powder cake of hexagonal mesoporous material;

[0096] The 30g hexagonal mesoporous material raw powder filter cake obtained by the above-mentioned suction filtration is put into a 100ml ball mill jar, wherein, the material of the ball mill jar is polytetrafluoroethylene, the material of the ball mill is agate, the diameter of th...

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Abstract

The invention discloses a catalyst for propane dehydrogenation and a preparation method thereof, and a method for preparing propylene from propane through dehydrogenation, belonging to the field of catalysts. The catalyst for propane dehydrogenation comprises a carrier, and further comprises a component Pt, a component Sn and a component Na loaded on the carrier, wherein the carrier is a hexagonalporous material; the hexagonal porous material has a cubic cage pore channel structure; the crystal structure of the hexagonal porous material has a centered cubic Im3m structure; the hexagonal porous material has an average pore size of 4-15 nm, a specific surface area of 550-650 m<2> / g, a pore volume of 0.5-1.5 mL / g and an average particle size of 30-50 [mu]m. The propane dehydrogenation catalyst shows good catalytic performance, high propane conversion rate, high propylene selectivity and good catalyst stability when applied to preparation of propylene through propane dehydrogenation.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a propane dehydrogenation catalyst, a preparation method thereof and a method for preparing propylene from propane dehydrogenation. 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 for propylene in the chemical industry. Therefore, increasing the production of propylene has become a hot research topic. Among them, propane dehydrogenation to propylene is a major technology for increasing propylene production. For more t...

Claims

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Application Information

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IPC IPC(8): B01J29/03B01J35/02B01J35/10B01J37/02C07C5/333C07C11/06
CPCC07C5/3337B01J29/0308B01J29/0325B01J37/0201C07C2523/04C07C2523/14C07C2523/42C07C2529/03B01J2229/18B01J35/394B01J35/50B01J35/617B01J35/638B01J35/647C07C11/06Y02P20/52
Inventor 亢宇刘红梅张明森
Owner CHINA PETROLEUM & CHEM CORP
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