Method for preparing vulcanized dehydrogenation catalyst

A dehydrogenation catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems affecting the production efficiency of production equipment, long time, etc.

Active Publication Date: 2010-12-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pre-sulfurization method of the dehydrogenation catalyst in the prior art mainly adopts pre-sulfurization in the reactor, the catalyst is loaded into the reactor, and then the vulcanizing agent is introduced for vulcanization. The main disadvantage is that the time is long, which affects the production efficiency of the production device.

Method used

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Examples

Experimental program
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Effect test

example 1

[0021] Alumina supports containing La and Sn were prepared. 1.0M aluminum trichloride solution, 0.01M tin tetrachloride solution and 0.01M La(NO 3 ) 3 The solution is mixed, and the precipitation reaction is carried out with ammonia water with a weight concentration of 10%. The precipitation reaction temperature is 60-80°C, and the pH value is controlled at 7.0-9.0. , and calcined at 650°C for 4 hours to obtain alumina pellets containing 0.5wt% La and 0.4wt% Sn. When preparing other alumina supports with different La and Sn contents, the amount of various raw materials can be adjusted appropriately.

[0022] The calcined carrier was impregnated with an aqueous solution containing chloroplatinic acid at 70°C for 6h, dried at 120°C for 5h, then calcined at 500°C for 4h, and activated in air containing water vapor for 4h. Then at 70 °C with KNO 3 Immersed in aqueous solution for 2h, dried and roasted under the same conditions, and then impregnated (NH 4 ) 2 After the S solu...

example 2

[0026] Alumina supports containing La and Sn were prepared. Mix 1.03M aluminum trichloride solution, 0.02M tin tetrachloride solution and 0.03M La(NO 3 ) 3 After the solution is mixed, add ammonia water with a weight concentration of 11%, mix evenly in a neutralization tank at 60-80°C, control the pH value to 7.0-9.0, filter, wash with water, and acidify, pressurize the oily ammonia column into balls, After drying, aging and calcining at 750°C for 4 hours, alumina pellets containing 1.0wt% La and 2.0wt% Sn were obtained.

[0027] The calcined carrier was impregnated with an aqueous solution containing chloroplatinic acid at 70°C for 6h, dried at 120°C for 5h, then calcined at 500°C for 4h, and activated in air containing water vapor for 4h. Then at 70 °C with KNO 3 and aqueous solution of immersion for 2h, dried and roasted under the same conditions, and then impregnated (NH 4 ) 2 S solution was reduced in hydrogen at 500°C for 4 hours to obtain the catalyst. The loading...

example 3

[0031] Alumina supports containing La and Sn were prepared. 0.96M aluminum trichloride solution, 0.01M tin tetrachloride solution and 0.02M La(NO 3 ) 3 After the solution is mixed, add ammonia water with a weight concentration of 11%, mix evenly in a neutralization tank at 60-80°C, control the pH value to 7.0-9.0, filter, wash with water, and acidify, pressurize the oily ammonia column into balls, and pass through Drying, aging, and calcining at 700°C for 4 hours to obtain alumina pellets containing 1.5wt% La and 1.0wt% Sn.

[0032] The calcined carrier was impregnated with an aqueous solution containing chloroplatinic acid at 70°C for 6h, dried at 120°C for 5h, then calcined at 500°C for 4h, and activated in air containing water vapor for 4h. Then at 70 °C with KNO 3 and aqueous solution of immersion for 2h, dried and roasted under the same conditions, and then impregnated (NH 4 ) 2 S solution was reduced in hydrogen at 500°C for 4 hours to obtain the catalyst. The load...

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PUM

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Abstract

The invention discloses a method for preparing a vulcanized dehydrogenation catalyst. The method comprises the following steps of: preparing an La and Sn-containing aluminum oxide carrier; dipping dehydrogenation active ingredients; performing vapor dechlorination process; and injecting a sulfur-containing compound and drying the carrier to obtain the dehydrogenation catalyst. The dehydrogenation catalyst prepared by the method has the advantages of high activity stability, long service life, high regeneration and the like when used for propane dehydrogenation and is particularly applicable to a technological process for preparing the propane by the propane dehydrogenation.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for alkane dehydrogenation to olefins, in particular to a catalyst preparation method for the reaction activity and stability of a propane dehydrogenation to propylene catalyst. Background technique [0002] Since the beginning of the new century, the demand for petrochemical raw materials and petrochemical products in the world will continue to grow, and the demand for propylene as a basic petrochemical raw material will continue to grow. However, the capacity of conventional steam cracking and FCC technology to produce propylene cannot meet the rapidly growing demand, making its market There is a global shortage. Moreover, with the increasing scarcity of petroleum resources, the production of propylene has changed from purely relying on petroleum as a raw material to diversifying the technical route of raw material sources, especially the technical route of producing olefins from low-carbon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/045B01J37/00C07C5/333C07C11/06
CPCY02P20/52
Inventor 张海娟李江红金亮张喜文宋喜军
Owner CHINA PETROLEUM & CHEM CORP
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