Propane dehydrogenation catalyst and preparation method thereof and method for preparing propylene by propane dehydrogenation

A propane dehydrogenation and catalyst technology, which is applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of easy deactivation, low propane conversion rate and low propylene selectivity , unstable mesoporous structure, etc., to achieve the effect of strong hydrophobicity, excellent hydrothermal stability, and simple post-treatment

Active 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

The purpose of the present invention is to overcome the defects in the prior art that the mesoporous structure is unstable, which further leads to the defects of low propane conversion rate and propylene selectivity and easy deactivation, and provide a propane dehydrogenation catalyst and its preparation method and propane dehydrogenation catalyst. Propylene production method

Method used

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  • Propane dehydrogenation catalyst and preparation method thereof and method for preparing propylene by propane dehydrogenation
  • Propane dehydrogenation catalyst and preparation method thereof and method for preparing propylene by propane dehydrogenation
  • Propane dehydrogenation catalyst and preparation method thereof and method for preparing propylene by propane dehydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0059] (1) Preparation of carrier

[0060]2.8 grams of phenol, 7.1 grams of 38% by weight formaldehyde solution and 69 grams of 0.1mol / L NaOH aqueous solution were successively added to a 250mL single-necked flask, heated and stirred at 72°C for 1.5 hours, and after dropping to 25°C, 6.72 grams of A mixed solution composed of P123 and 70 grams of deionized water, then heated the obtained mixture to 64°C, heated and stirred at 64°C for 120 hours, then raised the temperature to 72°C, stirred for 48 hours and then lowered to 25°C. The product was centrifuged to obtain a solid product, and the obtained solid product was dried in an oven at 80° C. for 4 hours; the dried solid product was raised from 25° C. to 350° C. at a rate of 1° C. per minute, and kept for 6 hours to obtain A mesoporous carbon material C1 with a cubic and hexagonal symbiotic pore structure of a cubic bo...

Embodiment 2

[0081] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0082] (1) Preparation of carrier

[0083] 2.8 grams of phenol, 23.7 grams of 38% by weight formaldehyde solution and 120 grams of 0.1mol / L NaOH aqueous solution were successively added to a 250mL single-necked flask, heated and stirred at 75°C for 2.5 hours, and after dropping to 25°C, 9.97g of A mixed solution composed of P123 and 70 grams of deionized water, then heated the obtained mixture to 60 ° C, heated and stirred at 60 ° C for 150 hours, then raised the temperature to 80 ° C, stirred for 36 hours and then lowered to 25 ° C, and the obtained reaction The product was centrifuged to obtain a solid product, and the obtained solid product was dried in an oven at 90° C. for 3.5 hours; the dried solid product was raised from 25° C. to 500° C. at a rate of 1° C. per minute, and kept for 4 hours to obtain A mesoporous carbon material C2 with a cubic and hexagonal symb...

Embodiment 3

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

[0092] (1) Preparation of carrier

[0093] 2.8 grams of phenol, 11.6 grams of 38% by weight formaldehyde solution and 90 grams of 0.1mol / L NaOH aqueous solution were successively added to a 250mL single-necked flask, heated and stirred at 70°C for 3 hours, and after dropping to 25°C, 13.3 grams of A mixed solution composed of P123 and 70 grams of deionized water, and the resulting mixture was heated to 65°C, heated and stirred at 65°C for 110 hours, then heated to 75°C, stirred for 40 hours and then lowered to 25°C, and the obtained reaction The product was centrifuged to obtain a solid product, and the obtained solid product was dried in an oven at 100° C. for 3 hours; the dried solid product was raised from 25° C. to 450° C. at a rate of 1° C. per minute, and kept for 5 hours to obtain A mesoporous carbon material C3 with a cubic and hexagonal symbiotic pore structur...

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Abstract

The invention relates to the field of catalysts and discloses a propane dehydrogenation catalyst and a preparation method thereof and a method for preparing propylene by propane dehydrogenation. The propane dehydrogenation catalyst comprises a supporter, a Pt component, a Sn component and a Na component, and the Pt component, a Sn component and a Na component are supported on the supporter. The supporter is made of a mesoporous carbon material is in a cube-core-structure cubic and hexagonal intergrowth pore passage structure. The mesoporous carbon material is characterized in that the specificsurface area is 300-450m<2>/g, the pore volume is 0.1-0.5mL/g, and most probable pore diameter is 2-5nm. The propane dehydrogenation catalyst applied to reaction of propane dehydrogenation for preparing propylene shows excellent catalytic performance, and high propane conversion rate, high propylene selectivity and high catalyst stability are realized.

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): B01J23/62B01J35/10B01J37/02B01J37/08C07C5/333C07C11/06
CPCY02P20/52
Inventor 刘红梅亢宇张明森
Owner CHINA PETROLEUM & CHEM CORP
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