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Catalyst for producing low-carbon olefin, preparation method and application thereof

A low-carbon olefin and catalyst technology, which is applied in the field of catalysts for the direct production of low-carbon olefins by Fischer-Tropsch synthesis, can solve the problems of low selectivity of low-carbon olefins and the like, and achieve the effects of high conversion rate of raw materials and improved catalytic performance.

Active Publication Date: 2021-04-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is the problem of low selectivity of low-carbon olefins in the reaction of direct production of low-carbon olefins in the prior art, and a new catalyst for direct production of low-carbon olefins and its preparation method and application are provided

Method used

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  • Catalyst for producing low-carbon olefin, preparation method and application thereof
  • Catalyst for producing low-carbon olefin, preparation method and application thereof
  • Catalyst for producing low-carbon olefin, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] 1. Preparation of catalyst

[0045] Ferric nitrate nonahydrate containing 1 mole of Fe (molecular formula is: Fe(NO 3 ) 3 9H 2 O), containing 50% manganese nitrate solution of 0.45 moles of Mn (molecular formula is: Mn(NO 3 ) 2 ), gallium nitrate pentahydrate containing 0.2 moles of Ga (molecular formula: Ga(NO 3 ) 3 ·5H 2 O), potassium nitrate containing 0.05 mole K (molecular formula: KNO 3 ) were sequentially dissolved in deionized water, and after complete dissolution, the metal ion mixed solution I was obtained. Dissolve 2.2 moles of ammonium carbamate in deionized water to obtain precipitant solution II after complete dissolution. The metal ion mixed solution I and the precipitant solution II were fed in parallel to carry out co-precipitation reaction, and aged at 20° C. for 36 hours to obtain the mixed slurry III. Send the mixed slurry III into a spray dryer, spray dry into microspherical fine particles, and then calcine at a temperature of 650°C for 8 h...

Embodiment 2

[0056] 1. Preparation of catalyst

[0057] Ferric nitrate nonahydrate containing 1 mole of Fe (molecular formula is: Fe(NO 3 ) 3 9H 2 O), containing 50% manganese nitrate solution of 0.30 moles of Mn (molecular formula is: Mn(NO 3 ) 2 ), gallium nitrate pentahydrate containing 0.10 moles of Ga (molecular formula: Ga(NO 3 ) 3 ·5H 2 O), potassium nitrate containing 0.10 mole K (molecular formula: KNO 3 ) were sequentially dissolved in deionized water, and after complete dissolution, the metal ion mixed solution I was obtained. Dissolve 2.2 moles of ammonium formate in deionized water to obtain precipitant solution II after complete dissolution. The metal ion mixed solution I and the precipitant solution II were fed in parallel to carry out co-precipitation reaction, and aged at 20° C. for 36 hours to obtain the mixed slurry III. Send the mixed slurry III into a spray dryer, spray dry into microspherical fine particles, and then calcine at a temperature of 650°C for 8 ho...

Embodiment 3

[0064] 1. Preparation of catalyst

[0065] Ferric nitrate nonahydrate containing 1 mole of Fe (molecular formula is: Fe(NO 3 ) 3 9H 2 O), containing 50% manganese nitrate solution of 0.60 moles of Mn (molecular formula is: Mn(NO 3 ) 2 ), zinc nitrate hexahydrate containing 0.01 mole of Zn (molecular formula: Zn(NO 3 ) 2 ·6H 2 O), lithium nitrate containing 0.15 moles of Li (molecular formula: LiNO 3 ) were sequentially dissolved in deionized water, and after complete dissolution, the metal ion mixed solution I was obtained. Dissolve 3.52 moles of ammonium carbamate in deionized water to obtain precipitant solution II after complete dissolution. The metal ion mixed solution I and the precipitant solution II are fed in parallel to carry out co-precipitation reaction, and aged at 30° C. for 1 hour to obtain the mixed slurry III. The mixed slurry III is sent to a spray dryer, spray-dried into microspherical fine particles, and then calcined at a temperature of 500°C for a...

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Abstract

The invention discloses a catalyst for directly producing low-carbon olefin through Fischer-Tropsch synthesis, a preparation method and application of the catalyst. In the catalyst, an active component contains a compound of which the chemical formula is Fe100MnaAbBcOx in terms of atomic ratio, wherein A is selected from one or more of Zn, Ga, Ge and In; and B is selected from one or more of Li, Na, K and Cs. The catalyst is prepared by taking ammonium carbamate and / or an ammonium formate solution as a precipitant and adopting pulping, mixing and spraying integrated molding. When the catalyst is used for directly producing low-carbon olefin through Fischer-Tropsch synthesis, the catalyst has the advantages of high raw material conversion rate and high low-carbon olefin selectivity, and is beneficial to large-scale fluidized bed industrial production.

Description

technical field [0001] The invention relates to a catalyst used in Fischer-Tropsch synthesis reaction, in particular to a catalyst for direct production of low-carbon olefins by Fischer-Tropsch synthesis, its preparation method and application. Background technique [0002] The direct production of low-carbon olefins from syngas is the process of directly obtaining low-carbon olefins with carbon atoms less than or equal to 4 through Fischer-Tropsch synthesis reaction of carbon monoxide and hydrogen under the action of a catalyst. This process does not need to pass from syngas to methanol like the indirect process. Or dimethyl ether, to further prepare olefins, simplify the process flow, and greatly reduce investment. At the same time, coal resources can be used to produce synthesis gas through gas production. China's abundant coal resources and relatively low coal prices provide a good market opportunity for the development of coal-based synthesis gas to directly produce low...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J37/03C07C1/04C07C11/04C07C11/06C07C11/08
CPCB01J23/8892B01J23/002B01J37/031C07C1/044B01J2523/00C07C2523/889C07C11/04C07C11/06C07C11/08B01J2523/13B01J2523/32B01J2523/72B01J2523/842B01J2523/11B01J2523/27B01J2523/12B01J2523/42B01J2523/15B01J2523/33Y02P20/52
Inventor 李剑锋陶跃武庞颖聪
Owner CHINA PETROLEUM & CHEM CORP
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