Catalyst for dehydrogenation of light alkanes to olefins

A technology of low-carbon alkanes and catalysts, which is applied in the field of catalysts and can solve problems such as poor stability and low activity of low-carbon alkanes dehydrogenation catalysts

Active Publication Date: 2018-04-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the problem of low activity and poor stability of low-carbon alkane dehydrogenation catalysts in the prior art, and a new catalyst for the dehydrogenation of low-carbon alkane to olefins is provided

Method used

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  • Catalyst for dehydrogenation of light alkanes to olefins
  • Catalyst for dehydrogenation of light alkanes to olefins
  • Catalyst for dehydrogenation of light alkanes to olefins

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 9.31g of alumina carrier and pour it into 200mL of deionized water and stir for 1 hour, weigh 1.081g of cerium ammonium nitrate and 0.212g of zirconium nitrate and dissolve them in 50mL of deionized water respectively, then mix the two evenly, pour alumina and In the mixed solution of water, after continuing to stir for 1 hour, ammonia water was slowly added dropwise under continuous stirring until the pH was 8.5. The product was aged for 2 hours, filtered and washed with 2L of water to obtain a filter cake, dried at 90°C for 16 hours, and then calcined in a muffle furnace at 580°C for 20 hours to obtain Ce 0.8 Zr 0.2 o 2 -Al 2 o 3carrier. Weigh 0.190g of stannous chloride and dissolve it in 10mL of hydrochloric acid solution, add it to the above-mentioned carrier under stirring, mix well, soak at 30°C for 12 hours, and then dry at 90°C for 16 hours to obtain the catalyst precursor, which is recorded as I. Weigh 0.159g of chloroplatinic acid, 0.207g of potass...

Embodiment 2

[0026] Weigh 9.35g of alumina carrier and pour it into 200mL of deionized water and stir for 1 hour, then weigh 1.081g of cerium ammonium nitrate and 0.212g of zirconium nitrate and dissolve them in 50mL of deionized water respectively, then mix the two evenly, pour alumina and In the mixed solution of water, after continuing to stir for 1 hour, ammonia water was slowly added dropwise under continuous stirring until the pH was 8.5. The product was aged for 2 hours, filtered and washed with 2L of water to obtain a filter cake, dried at 90°C for 16 hours, and then calcined in a muffle furnace at 580°C for 20 hours to obtain Ce 0.8 Zr 0.2 o 2 -Al 2 o 3 carrier. Weigh 0.190g of stannous chloride and dissolve it in 10mL of hydrochloric acid solution, add it to the above-mentioned carrier under stirring, mix well, soak at 30°C for 12 hours, and then dry at 90°C for 16 hours to obtain the catalyst precursor, which is recorded as I. Weigh 0.159g of chloroplatinic acid, 0.207g of ...

Embodiment 3

[0028] Weigh 8.86g of alumina carrier and pour it into 200mL of deionized water and stir for 1 hour. Weigh 1.081g of cerium ammonium nitrate and 0.212g of zirconium nitrate and dissolve them in 50mL of deionized water respectively, then mix the two evenly, pour alumina and In the mixed solution of water, after continuing to stir for 1 hour, ammonia water was slowly added dropwise under continuous stirring until the pH was 8.5. The product was aged for 2 hours, filtered and washed with 2L of water to obtain a filter cake, dried at 90°C for 16 hours, and then calcined in a muffle furnace at 580°C for 20 hours to obtain Ce 0.8 Zr 0.2 o 2 -Al 2 o 3 carrier. Weigh 0.190g of stannous chloride and dissolve it in 10mL of hydrochloric acid solution, add it to the above-mentioned carrier under stirring, mix well, soak at 30°C for 12 hours, and then dry at 90°C for 16 hours to obtain the catalyst precursor, which is recorded as I. Weigh 0.159g of chloroplatinic acid, 0.207g of potas...

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Abstract

The invention relates to a catalyst for dehydrogenating low-carbon alkanes to olefins, which mainly solves the problems of low activity and poor stability of dehydrogenation catalysts prepared in the prior art. The present invention adopts a catalyst for dehydrogenating low-carbon alkanes to olefins, and comprises the following components in parts by weight: a) 0.1 to 5 parts of Pt or its oxides; b) 0.1 to 5 parts of Sn or its oxides ; c) 0.1 to 5 parts of alkali metals or their oxides; d) 0.1 to 5 parts of alkaline earth metals or their oxides; e) 0.1 to 10 parts of Ce-Zr-O solid solution; f) 80 to 99 parts of Al2O3 The technical solution better solves the problem and can be used in the industrial production of olefins from the dehydrogenation of low-carbon alkanes.

Description

technical field [0001] The invention relates to a catalyst for dehydrogenating low-carbon alkanes to olefins. Background technique [0002] Low-carbon olefins are widely used in the production of plastics, synthetic rubber, pharmaceuticals, gasoline additives, ion exchange resins, detergents, spices and various chemical intermediates. They are important organic chemical raw materials, mainly used in steam cracking and refinery fluidization Obtained as a by-product / co-product of the catalytic cracking process. With the development of the chemical industry, the demand for low-carbon olefins is growing rapidly. The development of the process of producing low-carbon alkanes from low-value-added alkanes is of great significance for making full use of low-carbon alkanes resources and opening up new sources of alkenes. Currently, only Relying on the above methods has been difficult to meet the needs of the rapid development of my country's chemical industry. Propane / isobutane dehy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63C07C5/333C07C11/09C07C11/06
CPCY02P20/52
Inventor 姜冬宇缪长喜吴文海曾铁强樊志贵
Owner CHINA PETROLEUM & CHEM CORP
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