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Catalyst converting synthesis gas into low carbon alkene, preparation method and applications

A technology for synthesis gas conversion and low-carbon olefins, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low CO conversion rate, etc. Mild, good propylene selectivity, good selectivity effect

Active Publication Date: 2013-12-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem of low CO conversion rate in the prior art, and to provide a method that can improve the conversion rate of CO in the reaction process of converting syngas into light olefins, and has high selectivity of low carbon olefins at the same time , especially the selective oxide catalyst of propylene, and the preparation process of the catalyst of the present invention is simple and easy to implement

Method used

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  • Catalyst converting synthesis gas into low carbon alkene, preparation method and applications
  • Catalyst converting synthesis gas into low carbon alkene, preparation method and applications
  • Catalyst converting synthesis gas into low carbon alkene, preparation method and applications

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preparation example Construction

[0027] The present invention also provides a method for preparing a catalyst for converting synthesis gas into light olefins, characterized in that the method comprises:

[0028] (1) Mix the alcoholic aqueous solution of the metal salt with the alcoholic aqueous solution of the complexing agent to obtain a mixed solution. The alcoholic aqueous solution of the metal salt contains iron salt, cobalt salt, and metal M salt, and the metal in the metal M salt M is one or more of IA, IIA, IB, IIB, VIIB and Group VIII metals except iron and cobalt;

[0029] (2) Adding an alkali solution into the mixed solution at a temperature of 40-80°C, so that the pH of the mixed solution is 1-7;

[0030] (3) aging the mixed solution with a pH value of 1-7 to obtain a sol; then aging the sol to obtain a gel;

[0031] (4) Drying and firing the gel.

[0032] According to the present invention, the selection of the metal M in the preparation method is the same as the selection of the metal M in the ...

Embodiment 1

[0064] This example is used to illustrate the catalyst provided by the present invention and its preparation method.

[0065] Weigh 20.20g ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) dissolved in 14ml ethanol and 8ml deionized water to obtain an alcoholic aqueous solution of ferric nitrate; weigh 33.95g cobalt nitrate hexahydrate (Co(NO 3 ) 2 .6H 2 O) Dissolved in 13ml of ethanol and 8ml of deionized water to obtain an alcoholic aqueous solution of cobalt nitrate; after mixing the alcoholic aqueous solution of ferric nitrate and the alcoholic aqueous solution of cobalt nitrate, add 50% by weight of manganese nitrate (the density at 20°C is 1.54 g / cm 3 ) 14.30ml was dissolved in it, and prepared as an alcoholic aqueous solution of a metal salt. The total metal content in the alcoholic aqueous solution of the metal salt is 4.23 mol / L. Weigh 39.03g of citric acid and dissolve it in 19ml of ethanol and 28ml of deionized water to prepare an alcoholic solution of citric a...

Embodiment 2

[0071] This example is used to illustrate the catalyst provided by the present invention and its preparation method.

[0072] Weigh 48.48g ferric nitrate nonahydrate (Fe(NO 3 ) 3 .9H 2 O) dissolved in 24.8ml ethanol and 13.4ml deionized water to obtain an alcoholic aqueous solution of ferric nitrate; weigh 14.97g cobalt nitrate hexahydrate (Co(NO 3 ) 2 .6H 2 O) Dissolve in 8.8ml ethanol and 7.4ml deionized water to obtain an alcoholic aqueous solution of cobalt nitrate; after mixing the alcoholic aqueous solution of ferric nitrate and the alcoholic aqueous solution of cobalt nitrate, add 50% by weight of manganese nitrate (density at 20°C 1.54g / cm 3 ) 2.00ml was dissolved in it to prepare the alcohol solution of the metal salt. The total metal content in the alcoholic aqueous solution of the metal salt is 3.20 mol / L. Weigh 36.83g of citric acid and dissolve it in 25ml of ethanol and 30ml of deionized water to prepare an alcoholic solution of citric acid, wherein the con...

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Abstract

The invention discloses a catalyst converting synthesis gas into low carbon alkene. The catalyst is characterized in that the catalyst contains iron, cobalt and metal M; With Fe2O3 and Co2O3 as counts respectively and the total weight of iron and cobalt in the catalyst as a standard, by weight, the content of iron is 20-80%, and the content of cobalt is 20-80%. With MO as a count, by weight, the content of metal M is 0.1-37% of the total weight of iron and cobalt. The metal M is one or more selected from IA, IIA, IB, IIB, VIIB and VIII metals except iron and cobalt. The invention also provides a preparation method for a catalyst used for converting synthesis gas into low carbon alkene and a prepared catalyst. The invention provides applications of the catalyst in conversion of synthesis gas into low carbon alkene. The catalyst can realize conversion of synthesis gas into low carbon alkene well.

Description

technical field [0001] The present invention relates to a catalyst and its preparation method and application, in particular, to a 2 -C 4 Oxidation catalyst of light olefins and its preparation method and application. Background technique [0002] As basic organic chemical raw materials, light olefins play a pivotal role in modern petroleum and chemical industries. Especially for ethylene and propylene, with their increasing demand and expanding application fields, it is increasingly important to study methods for increasing the production of low-carbon olefins. [0003] The methods for preparing low-carbon olefins can be generally divided into two categories: one is the petroleum route, and the other is the non-petroleum route. So far, the world still mainly adopts the traditional light oil cracking method, that is, the petroleum route to produce low-carbon olefins such as ethylene and propylene. In the case of rising oil prices, the non-petroleum route of producing lig...

Claims

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Application Information

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IPC IPC(8): B01J23/889C07C1/04C07C11/02C07C11/06
CPCY02P20/52
Inventor 张雅琳张晓昕王宣孟祥堃慕旭宏宗保宁
Owner CHINA PETROLEUM & CHEM CORP
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