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Propane dehydrogenation catalyst, preparation method thereof and method for preparing propylene through propane dehydrogenation

A propane dehydrogenation and catalyst technology, applied in the direction of catalyst activation/preparation, catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve complex preparation process, environmental pollution, low propane conversion rate and propylene selectivity, etc. problem, to achieve the effect of simple preparation process, high conversion rate of propane and good catalytic performance

Active Publication Date: 2018-11-02
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 overcome the defects of the existing propane dehydrogenation catalysts, such as complex preparation process, easy to cause environmental pollution, low propane conversion rate and propylene selectivity, and provide a propane dehydrogenation catalyst and its preparation method and propane dehydrogenation catalyst. Hydrogen to propylene method

Method used

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

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preparation example Construction

[0023] The present invention also provides a method for preparing a propane dehydrogenation catalyst, wherein the preparation method comprises: immersing the carrier in a mixed solution containing Pt salt, Sn salt and Na salt, and then removing the solvent from the impregnated solution Drying and firing, wherein the carrier is a three-hole spherical mesoporous composite material, the average particle diameter of the three-hole spherical mesoporous composite material is 20-50 microns, the specific surface area is 150-600 square meters per gram, and the pores The volume is 0.5-1.5 ml / g, the pore size distribution is a three-peak distribution, and the most probable pore sizes corresponding to the three peaks are respectively 2-4 nm, 5-15 nm and 10-40 nm.

[0024] In the present invention, the amount of the carrier, Pt salt, Sn salt and Na salt is such that in the prepared propane dehydrogenation catalyst, based on the total weight of the propane dehydrogenation catalyst, the conte...

Embodiment 1

[0060] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0061] (1) Preparation of three-porous spherical mesoporous composites

[0062] Add 1.0 g (0.0001 mol) of triblock copolymer polyethylene glycol-polyglycerol-polyethylene glycol (P123) and 1.69 g (0.037 mol) of ethanol to 28 mL of acetic acid and sodium acetate at pH 4.4 In the buffer solution, stir at 15°C until P123 is completely dissolved, then add 6g (0.053mol) of trimethylpentane to the above solution, and stir at 15°C for 8 hours, then add 2.13g (0.014mol) ) tetramethoxysilane, then stirred at 15°C and pH 5 for 20 hours, and transferred the resulting solution to a polytetrafluoroethylene-lined reactor for oven crystallization at 60°C for 24 hours, The obtained crystallized product was suction filtered and washed four times with distilled water to obtain No. 1 mesoporous material filter cake;

[0063] At 80°C, cetyltrimethylammonium bromide and tetraethyl orthosili...

Embodiment 2

[0075] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0076] (1) Preparation of three-porous spherical mesoporous composites

[0077] Add 1.0 g of triblock copolymer P123 and 1 g of ethanol (0.022 mol) to 28 mL of a buffer solution of acetic acid and sodium acetate with a pH value of 5, stir at 20°C until P123 is completely dissolved, and then add 2.86 g (0.025mol) of trimethylpentane was added to the above solution, and after stirring for 1 hour at 20°C, 1.07g (0.007mol) of tetramethoxysilane was added, and then at 20°C, the pH was 6 Stirred under the conditions for 30 hours, and the resulting solution was transferred to a polytetrafluoroethylene-lined reaction kettle, oven crystallized at 40 ° C for 40 hours, and the obtained crystallized product was suction filtered and washed four times with distilled water to obtain No. 1 mesoporous material filter cake;

[0078] At 100°C, cetyltrimethylammonium bromide and tetraeth...

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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 for preparing propylene through propane dehydrogenation. The propane dehydrogenation catalyst comprises a carrier, and a main active component Pt, a metal additive Sn and a metal additive Na which are loaded on the carrier, wherein the carrier adopts a three-hole sphere mesoporous composite material; the average particle diameter of the three-hole sphere mesoporous composite material is 20 to 50 micrometers; the specific surface area of the material is 150 to 600 square meters / gram; the pore volume is 0.5 to 1.5 milliliters / gram; pore size distribution adopts three peak distribution; the most probable apertures corresponding to three peaks are 2 to 4nanometers, 5 to 15 nanometers and 10 to 40 nanometers separately. The propane dehydrogenation catalyst shows excellent catalytic performance during preparation of propylene through propane dehydrogenation, and has high propane conversion ratio, high propylene selectivity and good catalyst 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. 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 spot in research. Among them, propane dehydrogenation to propylene is a major technology for increasing propylene production. Over the year...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62C07C5/333C07C11/06
CPCC07C5/3337B01J23/626B01J37/0201C07C2523/62B01J35/51B01J35/40B01J35/635B01J35/647B01J35/615C07C11/06Y02P20/52
Inventor 刘红梅亢宇张明森
Owner CHINA PETROLEUM & CHEM CORP
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