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Preparation method of sulfuration mode propane dehydrogenation catalyst

A propane dehydrogenation and catalyst technology, which is applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as long time and affecting the production efficiency of production equipment, so as to increase stability and save start-up The effect of simple time and preparation method

Active Publication Date: 2015-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of the above vulcanization methods are mainly that the time is long, which affects the production efficiency of the production device, and the stability of the long-term operation of the catalyst needs to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] An aluminum trichloride solution with a concentration of 0.98M is prepared, and 0.00126 mol of tin tetrachloride and 0.0018 mol of lanthanum nitrate are added to the aluminum trichloride solution per liter of the solution. Based on 100% of the theoretical sulfur demand, an appropriate amount of potassium sulfide was weighed and dissolved in 8wt% ammonia water. Under the condition of stirring, slowly add the aluminum trichloride solution and the ammonia solution into the gel forming tank in parallel flow. Control the temperature in the glue tank to 70°C, control the flow rate of the above-mentioned aluminum trichloride solution to 2ml / min, control the adding rate of ammonia water, and maintain the pH value of the material in the glue tank at 8.0~10.0. After gel formation, the slurry was stirred and aged for 0.5 h under the condition of an ammonium ion concentration of 0.4M, and then the slurry was vacuum-dried, molded, and roasted under a nitrogen atmosphere. The drying...

example 2

[0028] Prepare an aluminum trichloride solution with a concentration of 1.18M, ​​and add 0.0051 mol of tin tetrachloride and 0.0043 mol of lanthanum nitrate per liter of the solution into the aluminum trichloride solution. Based on 110% of the theoretical sulfur demand, an appropriate amount of sodium sulfide was weighed and dissolved in 12wt% ammonia water. Under the condition of stirring, slowly add the aluminum trichloride solution and the ammonia solution into the gel forming tank in parallel flow. Control the temperature in the glue tank to 60°C, control the flow rate of the above-mentioned aluminum trichloride solution to 5ml / min, control the adding rate of ammonia water, and maintain the pH value of the material in the glue tank to be 8.0~10.0. After gelling, the slurry was stirred and aged for 2 hours under the condition of an ammonium ion concentration of 0.5M, and then the slurry was vacuum-dried, molded, and roasted under a nitrogen atmosphere. The drying temperatu...

example 3

[0033] An aluminum trichloride solution with a concentration of 1.08M is prepared, and 0.007mol of tin tetrachloride and 0.0059mol of lanthanum nitrate are added to the aluminum trichloride solution per liter of solution. Based on 120% of the theoretical sulfur requirement, an appropriate amount of sodium sulfide was weighed and dissolved in 15wt% ammonia water. Under the condition of stirring, slowly add the aluminum trichloride solution and the ammonia solution into the gel forming tank in parallel flow. Control the temperature in the glue tank to 80°C, control the flow rate of the above-mentioned aluminum trichloride solution to 2ml / min, control the adding rate of ammonia water, and maintain the pH value of the material in the glue tank at 8.0~10.0. After gel formation, the slurry was stirred and aged for 1 h under the condition of an ammonium ion concentration of 0.6 M, and then the slurry was vacuum-dried, molded, and calcined under a nitrogen atmosphere. The drying temp...

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Abstract

The invention discloses a preparation method of a sulfuration mode propane dehydrogenation catalyst. The method comprises the following steps: 1, preparing alumina by adopting a sol-gel technology, and introducing La, Sn and alkali metal sulfide in a glue forming process; 2, supporting a dehydrogenation active component to an alumina carrier prepared in step 1 through adopting an immersion technology; 3, introducing an alkali metal assistant or to a catalyst precursor obtained in step 2, or co-immersing the alkali metal assistant component and the dehydrogenation active component in the carrier; and 4, introducing a hydrogen and water vapor mixed gas into the catalyst precursor obtained in step 3, reducing, sulfurating, and dechlorinating to obtain the sulfuration mode propane dehydrogenation catalyst. The catalyst has the advantages of simple preparation process, full sulfuration, effective reduction of the loss of the alkali metal assistant, and improved long-cycle running activity stability.

Description

technical field [0001] The invention relates to a preparation method of a sulfurized propane dehydrogenation catalyst, in particular to a preparation method of a highly active and stable sulfurized propane dehydrogenation 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 production capacity of conventional steam cracking and FCC technology cannot meet the rapidly growing demand for propylene, causing the market to emerge 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 alkanes as raw material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/045
Inventor 张海娟李江红王振宇乔凯
Owner CHINA PETROLEUM & CHEM CORP
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