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Propane dehydrogenation catalyst, preparation method thereof and method using propane dehydrogenation to prepare propylene

A propane dehydrogenation and catalyst technology, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of poor catalytic activity and unfavorable Storage, transportation, subsequent processing and application, poor fluidity and other issues, to achieve good structural stability, good mechanical strength, and appropriate pore size

Inactive Publication Date: 2019-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the poor fluidity and easy agglomeration of the existing rod-shaped ordered mesoporous materials used as propane dehydrogenation catalyst supports, which is not conducive to its storage, transportation, subsequent processing and application, and thus leads to The supported propane dehydrogenation catalyst carrier prepared by the supported propane dehydrogenation catalyst has defects such as poor catalytic activity, and provides a propane dehydrogenation catalyst and its preparation method and a method for propane dehydrogenation to propylene

Method used

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  • Propane dehydrogenation catalyst, preparation method thereof and method using propane dehydrogenation to prepare propylene
  • Propane dehydrogenation catalyst, preparation method thereof and method using propane dehydrogenation to prepare propylene
  • Propane dehydrogenation catalyst, preparation method thereof and method using propane dehydrogenation to prepare propylene

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Embodiment approach

[0039] Preferably, in the step (a), the conditions of the contact include: the temperature is 10-60° C., the time is more than 25 minutes, and the pH is 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.

[0040] In the present invention, the amount of the template agent and the silicon source can be changed within a wide range, for example, the molar ratio of the template agent and the amount of the silicon source can be 1:200-300; preferably 1: 225-275.

[0041] In the present invention, the silicon source can be various silicon sources conventionally used in the art, preferably the silicon source is ethyl orthosilicate, methyl orthosilicate, propyl orthosilicate, sodium orthosilicate and At least one of silica sol, more preferably tetraethyl orthosilicate.

[0042] According to the present invention, the conditions ...

Embodiment 1

[0055] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0056] (1) Preparation of carrier

[0057] Add 2g of template agent F127 to a solution containing 37% by weight of hydrochloric acid (2.9g) and water (56g), stir at 40°C until F127 is completely dissolved; then add 8.2g (0.04mol) of tetraethyl orthosilicate into the above solution, stirred at 40°C for 45min, then transferred the resulting solution to a polytetrafluoroethylene-lined reactor, crystallized at 100°C for 24h, then filtered and washed 4 times with deionized water, Then carry out suction filtration and drying to obtain the raw powder of the mesoporous material; wash the raw powder of the mesoporous material with ethanol under reflux conditions for 24 hours, remove the template agent, and obtain spherical mesoporous silica C1.

[0058] (2) Preparation of propane dehydrogenation catalyst

[0059] 0.08g H 2 PtCl 6 ·6H 2 O, 0.207g SnCl 4 ·5H 2 O and 0.185g ...

Embodiment 2

[0076] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0077] (1) Preparation of carrier

[0078] Add 2g of template agent F127 to a solution containing 37% by weight of hydrochloric acid (2.9g) and water (56g), stir at 40°C until F127 is completely dissolved; then add 9.09g (0.044mol) ethyl orthosilicate into the above solution, stirred at 60°C for 20h, then transferred the resulting solution to a polytetrafluoroethylene-lined reactor, crystallized at 120°C for 20h, then filtered and washed 4 times with deionized water, Then perform suction filtration and drying to obtain the raw powder of the mesoporous material; wash the raw powder of the mesoporous material with ethanol under reflux conditions for 24 hours, remove the template agent, and obtain spherical mesoporous silica C2.

[0079] (2) Preparation of propane dehydrogenation catalyst

[0080] 0.08g H 2 PtCl 6 ·6H 2 O, 0.207g SnCl 4 ·5H 2 O and 0.185g NaNO 3 Di...

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Abstract

The invention relates to the field of catalysts and discloses a propane dehydrogenation catalyst, a preparation method thereof and a method using propane dehydrogenation to prepare propylene. The propane dehydrogenation catalyst comprises a carrier and a Pt component, a Sn component and a Na component which are loaded onto the carrier, wherein the carrier is spherical mesoporous silica, the spherical mesoporous silica has a cubic core structure, the compressive strength of the spherical mesoporous silica is 12-16MPa, the average particle size of the spherical mesoporous silica is 2-10 micrometers, the specific surface area of the spherical mesoporous silica is 700-900m<2> / g, the pore volume of the spherical mesoporous silica is 0.5-1mL / g, and the most probable pore diameter of the spherical mesoporous silica is 1-5 nanometers. When the propane dehydrogenation catalyst which is high in compressive strength is used in the reaction of propylene preparation using propane dehydrogenation, the propane dehydrogenation catalyst is good in catalytic performance, high in propane conversion rate, high in propylene selectivity and good in stability.

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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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62B01J35/10B01J35/08C07C5/333C07C11/06
CPCY02P20/52
Inventor 刘红梅亢宇张明森
Owner CHINA PETROLEUM & CHEM CORP
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