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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, which is used in catalyst activation/preparation, carbon compound catalysts, catalysts, etc., can solve the problems of low propane conversion rate and propylene selectivity, unstable mesoporous structure, etc. low cost effect

Active Publication Date: 2019-11-12
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 instability of the mesoporous structure in the prior art, which further leads to the defects that the conversion rate of propane and the selectivity of propylene are not high

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0066] Preparation Example 1: Preparation of composite material F1 containing rod-shaped mesoporous molecular sieve C1 and silica gel A

[0067] (1) Add 4.0 grams of P123 to a solution containing 37% by weight of hydrochloric acid (16.4mL) and water (128mL), stir at 40°C until P123 is completely dissolved; then add 8.86 grams of ethyl orthosilicate to the above solution Stirred at 40°C for 24h to obtain solution A;

[0068] (2) Transfer the solution A to a polytetrafluoroethylene-lined reactor, crystallize at 100° C. for 24 hours, then filter, wash and dry to obtain the raw powder of the mesoporous material;

[0069] (3) washing the raw powder of the mesoporous material with ethanol under reflux conditions for 24 hours, removing the template agent, and obtaining rod-shaped mesoporous molecular sieve C1 (that is, SBA-15);

[0070] (4) At 25° C., 20 g of rod-shaped mesoporous molecular sieve C1 and 10 g of silica gel A (refer to Table 1 for relevant parameters, purchased from G...

preparation example 2

[0074] Preparation Example 2: Preparation of composite material F2 containing rod-shaped mesoporous molecular sieve C2 and silica gel B

[0075] (1) Add 4.0 grams of P123 to a solution containing 37% by weight of hydrochloric acid (16.4mL) and water (128mL), stir at 60°C until P123 is completely dissolved; then add 12.0 grams of ethyl orthosilicate to the above solution Stirred at 60°C for 18h to obtain solution A;

[0076] (2) Transfer the solution A to a polytetrafluoroethylene-lined reactor, crystallize at 120° C. for 20 h, then filter, wash and dry to obtain the original powder of the mesoporous material;

[0077] (3) washing the raw powder of the mesoporous material with ethanol under reflux conditions for 24 hours to remove the template agent to obtain rod-shaped mesoporous molecular sieve C2;

[0078] (4) At 25° C., 30 g of rod-shaped mesoporous molecular sieve C2 was blended with 10 g of silica gel B (refer to Table 1 for related parameters, purchased from Grace Compa...

preparation example 3

[0083] Preparation Example 3: Preparation of composite material F3 containing rod-shaped mesoporous molecular sieve C1 and silica gel B

[0084] First, rod-shaped mesoporous molecular sieve C1 was prepared by the same method as in Preparation Example 1.

[0085] Then, at 25° C., 40 g of rod-shaped mesoporous molecular sieve C1 and 10 g of silica gel B were blended to obtain composite material F3 as a carrier.

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Abstract

The present invention relates to the field of catalysts. Disclosed are a composite material, a preparation method of the composite material, a catalyst, a preparation method thereof and an applicationthereof, and a method for dehydrogenating propane to propylene. The composite material comprises silica gel and rod-shaped mesoporous molecular sieve, wherein the average pore diameter of the rod-shaped mesoporous molecular sieve is 3-9 nanometers, the specific surface area is 500-800 square meters per gram, and the pore volume is 0.5-1.5 ml per gram; the specific surface area of the silica gel is 150-400 square meters per gram, and the average pore diameter is 10-30 nanometers. The composite material containing rod-shaped mesoporous molecular sieve and silica gel provided by the invention has the advantage of stable structure, and when the active components form a catalyst together and are used in the reaction of dehydrogenation of propane to propylene, the conversion of propane and theselectivity of propylene can be obviously improved compared with the prior art.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a composite material and a preparation method thereof, a catalyst containing the composite material, a preparation method and application thereof, and a method for producing 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 propylene supply comes from refinery by-products, with about 45% from steam cracking and a small amount from other alternative technologies. [0003] 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/03B01J32/00B01J35/10B01J35/02B01J37/02C07C5/333C07C11/06
CPCB01J29/0308B01J29/0325B01J35/0066B01J35/026B01J35/1023B01J35/1042B01J35/1047B01J35/1061B01J37/0201B01J2229/20B01J2229/32C07C5/3337C07C2523/04C07C2523/14C07C2523/42C07C2529/03C07C11/06Y02P20/52
Inventor 亢宇刘红梅张明森
Owner CHINA PETROLEUM & CHEM CORP