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Composite material and its preparation method and catalyst as well as its preparation method and application and method for propane dehydrogenation to propylene

A composite material and catalyst technology, applied in the field of propane dehydrogenation to propylene, can solve the problems of low propane conversion rate, propylene selectivity, uneven dispersion of active metal components, unstable mesopore structure, etc., and achieve large pore volume, Effects with narrow distribution and simple postprocessing

Active Publication Date: 2022-01-04
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 complex preparation process of the existing propane dehydrogenation catalyst, the preparation process is easy to cause environmental pollution, the main active metal component Pt is not uniformly dispersed, and the mesopore structure is unstable, which further leads to poor propane conversion and propylene selectivity. High defect, provide a method for preparing spherical silica gel mesoporous silica composite material which is easy to operate, environment friendly and low cost and the spherical silica gel mesoporous silica composite material prepared by the method, containing the aforementioned composite material The catalyst has achieved good application in the preparation of propylene

Method used

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  • Composite material and its preparation method and catalyst as well as its preparation method and application and method for propane dehydrogenation to propylene
  • Composite material and its preparation method and catalyst as well as its preparation method and application and method for propane dehydrogenation to propylene
  • Composite material and its preparation method and catalyst as well as its preparation method and application and method for propane dehydrogenation to propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0073] 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 at a temperature of 40 ° C for 1 h at a mechanical stirring rate of 350 r / min, and then kept at a constant temperature, and then 1 g of commercially available ES955 Silica gel (GRACE company) was slowly added dropwise to the above mixture at a rate of 1 g / min, and the reaction was stirred for 40 h, and the resulting product was transferred to a polytetrafluoroethylene-lined reactor for crystallization at 120 ° C for 24 h, followed by Suction filtration and washing with deionized water for 4 times, and then centrifugal spray drying at 200° C. at a spe...

Embodiment 2

[0095] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0096] Add 2g triblock copolymer template agent P123 and 20g N,N-dimethylformamide (DMF) to a solution of 11.2g 37% hydrochloric acid and 64mL water, mix and stir until P123 is completely dissolved; then add 6.68g Ethyl orthosilicate was slowly added dropwise to the above solution at a rate of 1 g / min, stirred for 1 h at a temperature of 50°C and a mechanical stirring rate of 350 r / min, and then kept at a constant temperature, and then 1.2 g of commercially available ES955 silica gel (GRACE company) was slowly added dropwise to the above-mentioned mixture at a rate of 1 g / min, and stirred for 40 h, and the resulting product was transferred to a polytetrafluoroethylene-lined reactor for crystallization at 150 ° C for 24 h, followed by Carry out suction filtration and wash with deionized water 4 times, then carry out centrifugal spray drying at 150° C. at a speed of 11000...

Embodiment 3

[0105] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0106] Add 2g of triblock copolymer template agent P123 and 18g 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 5.34g Ethyl orthosilicate was slowly added dropwise to the above solution at a rate of 1 g / min, stirred for 1 h at a temperature of 50°C and a mechanical stirring rate of 350 r / min, and then kept at a constant temperature, and then 1.5 g of commercially available ES955 silica gel (GRACE company) was slowly added dropwise to the above-mentioned mixture at a rate of 1 g / min, and stirred for 40 h, and the resulting product was transferred to a polytetrafluoroethylene-lined reactor for crystallization at 30° C. for 72 h, followed by Carry out suction filtration and wash with deionized water 4 times, then carry out centrifugal spray drying at 300° C. at a rot...

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Abstract

The invention relates to the field of catalysts, and discloses a spherical silica gel mesoporous silica composite material, a preparation method thereof, a catalyst, a preparation method and application thereof, and a method for producing propylene from propane dehydrogenation. The preparation method of the spherical silica gel mesoporous silica composite material comprises: (a) mixing a template agent, N,N-dimethylformamide and hydrochloric acid until the solid is fully dissolved; (b) mixing the obtained The solution is first contacted with silicate; (c) the product obtained in step (b) is contacted with silica gel for the second time, and the mixture obtained after the second contact is successively filtered, washed and dried to obtain silica gel mesoporous dioxide Silicon composite raw powder; (d) removing the template agent in the product obtained in step (c). The method uses an in-situ growth method to synthesize a spherical silica gel mesoporous silica composite material with a large specific surface area and a large pore volume in one step, and the catalyst containing the composite material has been better applied in the preparation of propylene.

Description

technical field [0001] The present invention relates to the field of catalysts, in particular, to a spherical silica gel mesoporous silica composite material and a preparation method thereof, a catalyst containing the aforementioned spherical silica gel mesoporous silica composite material, a preparation method and application thereof, and a propane removal method. Process for the production of propylene from hydrogen. 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. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J35/10B01J35/08B01J23/62C07C5/333C07C11/06
CPCY02P20/52
Inventor 亢宇刘红梅张明森
Owner CHINA PETROLEUM & CHEM CORP
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