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

A propane dehydrogenation and catalyst technology, which is applied to catalysts, molecular sieve catalysts, carbon compound catalysts and other directions, can solve the problems of complex preparation process, low propane conversion rate and propylene selectivity, environmental pollution, etc., and achieves simple preparation process and high catalytic activity. , post-processing simple effects

Active Publication Date: 2018-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a propane dehydrogenation catalyst and its preparation method and propane Process for producing propylene from dehydrogenation

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0069] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0070] (1) Preparation of spherical three-mesoporous diatomite composite carrier

[0071] Dissolve 6g (0.001mol) of triblock copolymer surfactant P123 in 10ml of hydrochloric acid aqueous solution with a pH value of 4 and 220ml of deionized aqueous solution, stir for 4h until P123 dissolves to form a transparent solution, and then add it to the transparent solution Add 6g (0.08mol) of n-butanol and stir for 1h, then place it in a water bath at 40°C, slowly add 12.9g (0.062mol) of tetraethyl orthosilicate into the solution, and keep the temperature at about 40°C. Stir for 24 hours at a pH value of 4.5, then hydrothermally treat at 100°C for 24 hours, then filter and wash with deionized water for 4 times, and then suction filter to obtain filter cake A1 of No. 1 mesoporous molecular sieve material with three-dimensional cubic channels ;

[0072] Hexadecyltrimethylammoni...

Embodiment 2

[0094] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0095] (1) Preparation of spherical three-mesoporous diatomite composite carrier

[0096] Dissolve 6g (0.001mol) of triblock copolymer surfactant P123 in 10ml of hydrochloric acid aqueous solution with a pH value of 4 and 220ml of deionized aqueous solution, stir for 4h until P123 dissolves to form a transparent solution, and then add it to the transparent solution Add 6.7g (0.09mol) n-butanol and stir for 1h, then place it in a water bath at 40°C, slowly add 10.4g (0.05mol) ethyl tetrasilicate to the solution dropwise, and keep the temperature at about 40°C , pH value of 5 under the condition of stirring for 24 hours, then hydrothermal treatment at 90 ° C for 36 hours, followed by filtration and washing with deionized water for 4 times, and then suction filtration to obtain the filter cake of No. 1 mesoporous molecular sieve material with three-dimensional cubic channe...

Embodiment 3

[0108] This example is used to illustrate the propane dehydrogenation catalyst and its preparation method.

[0109] (1) Preparation of spherical three-mesoporous diatomite composite carrier

[0110] Dissolve 6g (0.001mol) of triblock copolymer surfactant P123 in 10ml of hydrochloric acid aqueous solution with a pH value of 4 and 220ml of deionized aqueous solution, stir for 4h until P123 dissolves to form a transparent solution, and then add it to the transparent solution Add 5.2g (0.07mol) n-butanol and stir for 1h, then place it in a water bath at 40°C, slowly add 12.5g (0.06mol) ethyl tetrasilicate to the solution dropwise, and keep the temperature at about 40°C , pH value of 5 under the condition of stirring for 24 hours, and then hydrothermal treatment at 100 ° C for 36 hours, followed by filtration and washing with deionized water for 4 times, and then suction filtration to obtain the filter cake of No. 1 mesoporous molecular sieve material with three-dimensional cubic c...

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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 through propane dehydrogenation.The propane dehydrogenation catalyst is prepared from a carrier, a main active components Pt, a metal additive Sn and a metal additive Na that are loaded on the carrier, wherein the carrier is a spherical three-mesoporous diatomite composite carrier, the spherical three-mesoporous diatomite composite carrier is prepared from diatomite, a mesoporous molecular sieve material with a three-dimensional cubic channel distribution structure, and a mesoporous molecular sieve material with a two-dimensional hexagonal channel distribution structure, the average particle size of the spherical three-mesoporous diatomite composite carrier is 30-60 mum, the specific surface area thereof is 150-600m<2>/g, the pore volume thereof is 0.5-1.8mL/g, pore size is in trimodal distribution, and optimum apertures corresponding to three peaks are separately 1-2nm, 2.5-5nm and 10-40nm. The propane dehydrogenation catalyst has high catalysis performance when being used in preparation of propylene through propane dehydrogenation, propane conversion rate is high, propylene selectivity is high, and the catalyst has high 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] Diatomaceous earth (Chloritejade) contains OH - Aluminosilicate minerals of magnesium, iron, and aluminum. Diatomaceous earth belongs to the 2:1+1 type clay, which can be widely used in the fields of catalyst carrier, paper making, coating and rubber. [0003] 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 lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/00B01J35/08B01J35/10C07C5/333C07C11/06
CPCB01J29/00B01J29/005B01J35/023B01J35/08B01J35/1019B01J35/1023B01J35/1042B01J35/1047B01J35/1095C07C5/3337C07C2529/00C07C11/06Y02P20/52
Inventor 亢宇刘红梅张明森
Owner CHINA PETROLEUM & CHEM CORP
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