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 produc

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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Example Embodiment

[0043]Example 1

[0044]1, prepared by catalyst

[0045]Interid (molecular formula) containing 1 mole of Fe's nine-water (molecular formula)3)3· 9h2O), containing 0.45 mole of Mn 50% nitrate solution (molecular formula: Mn (NO3)2), Containing 0.2 molar GA of five hydrogen nitrate (molecular formula: Ga (NO3)3· 5h2O), contain 0.05 mole K, potassium nitrate (molecular formula: KNO)3In sequentially dissolved in deionized water, after complete dissolution, the metal ion mixed solution I was obtained. 2.2 mole of ammonium ammonium methane is dissolved in deionized water, completely dissolved, resulting in a precipitant solution II. The metal ion mixed solution I and the precipitate solution II were added to the coprecipitation reaction, and the mixed slurry III was obtained at 20 ° C for 36 hours. The mixed slurry III was fed into the spray dryer, spray dried into microsphere fine particles, and then calcined, the calcination temperature was 650 ° C, the calcination time was 8 h, i.e., the cat...

Example Embodiment

[0055]Example 2

[0056]1, prepared by catalyst

[0057]Interid (molecular formula) containing 1 mole of Fe's nine-water (molecular formula)3)3· 9h2O), a 50% nitrate solution containing 0.30 mole Mn (molecular formula: Mn (NO)3)2), Containing 0.10 mole of Ga, a five hydrogen nitrate (molecular formula): Ga (NO3)3· 5h2O), containing 0.10 mole K, potassium nitrate (molecular formula: KNO)3In sequentially dissolved in deionized water, after complete dissolution, the metal ion mixed solution I was obtained. 2.2 mole of ammonium ammonium is dissolved in deionized water, completely dissolved, resulting in a precipitant solution II. The metal ion mixed solution I and the precipitate solution II were added to the coprecipitation reaction, and the mixed slurry III was obtained at 20 ° C for 36 hours. The mixed slurry III was fed into the spray dryer, spray dried into microsphere fine particles, and then calcined, the calcination temperature was 650 ° C, the calcination time was 8 h, i.e., the cata...

Example Embodiment

[0063]Example 3

[0064]1, prepared by catalyst

[0065]Interid (molecular formula) containing 1 mole of Fe's nine-water (molecular formula)3)3· 9h2O), a 50% nitrate solution containing 0.60 mole of Mn (molecular formula: Mn (NO)3)2), Zinc nitrate containing 0.01 mole of Zn (molecular formula: Zn (NO)3)2· 6h2O), lithium nitrate containing 0.15 mole of Li (Molecular formula: lino3In sequentially dissolved in deionized water, after complete dissolution, the metal ion mixed solution I was obtained. 3.52 mole of ammonium ammonium carbamate was dissolved in deionized water, completely dissolved, resulting in a precipitant solution II. The metal ion mixed solution I and the precipitating agent solution II were added to the coprecipitation reaction, and the mixed slurry III was obtained at 30 ° C for 1 hour. The mixed slurry III was fed into the spray dryer, spray dried into a microsphere fine particles, and then calcined, the calcination temperature was 500 ° C, and the calcination time was 10 ...

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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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