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Catalyst for producing low-carbon olefin by using synthesis gas and preparation method of catalyst

A technology of low-carbon olefins and catalysts, applied in the field of catalysts and their preparation, can solve the problems of low selectivity of low-carbon olefins, low CO conversion rate, etc., and achieve the effects of increasing conversion rate, increasing selectivity, and enhancing interaction strength

Active Publication Date: 2014-11-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the process of producing low-carbon olefins from syngas in the prior art, the conversion rate of CO is low, and the selectivity of low-carbon olefins in the product is low, and a catalyst for producing low-carbon olefins from syngas is provided , the catalyst has the advantages of high conversion rate of CO and high selectivity of low-carbon olefins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Mix 60.0g α-alumina and 40.0g ZSM-5 molecular sieve (silicon-aluminum ratio 100) powder evenly, press tablet and sieve into 60-80 mesh to prepare composite carrier H; 134.9g ferric nitrate nonahydrate, 35.6g 50% Manganese nitrate solution, 14.5g lanthanum nitrate hexahydrate, and 1.7g potassium nitrate were dissolved in 35.0g water to make mixed solution I; under the condition of vacuum degree of 80kPa, the above mixed solution I was impregnated in 60.0 g prepared Catalyst precursor J was obtained on the composite carrier H; the impregnated catalyst precursor J was dried at 110°C, and then calcined at 450°C for 2 hours to obtain a catalyst for producing low-carbon olefins from syngas. The weight of the active component and the composite carrier in the catalyst is 40% and 60% respectively, the weight ratio of ZSM-5 molecular sieve and α-alumina in the composite carrier, and the general composition formula of the atomic ratio of the active component is as follows:

[0033...

Embodiment 2

[0037] Mix 99.0g of α-alumina and 1.0g of ZSM-5 molecular sieve (silicon-aluminum ratio 100) powder evenly, press and sieve into 60-80 mesh to prepare composite carrier H; 134.9g of ferric nitrate nonahydrate, 35.6g of 50% Manganese nitrate solution, 14.5g lanthanum nitrate hexahydrate, and 1.7g potassium nitrate were dissolved in 35.0g water to make mixed solution I; under the condition of vacuum degree of 80kPa, the above mixed solution I was impregnated in 60.0 g prepared Catalyst precursor J was obtained on the composite carrier H; the impregnated catalyst precursor J was dried at 110°C, and then calcined at 450°C for 2 hours to obtain a catalyst for producing low-carbon olefins from syngas. The weight of the active component and the composite carrier in the catalyst is 40% and 60% respectively, the weight ratio of ZSM-5 molecular sieve and α-alumina in the composite carrier, and the general composition formula of the atomic ratio of the active component is as follows:

[...

Embodiment 3

[0042] Mix 20.0g α-alumina and 80.0g ZSM-5 molecular sieve (silicon-alumina ratio 100) powder evenly, press tablet and sieve into 60-80 mesh to prepare composite carrier H; 134.9g ferric nitrate nonahydrate, 35.6g 50% Manganese nitrate solution, 14.5g lanthanum nitrate hexahydrate, and 1.7g potassium nitrate were dissolved in 35.0g water to make mixed solution I; under the condition of vacuum degree of 80kPa, the above mixed solution I was impregnated in 60.0 g prepared Catalyst precursor J was obtained on the composite carrier H; the impregnated catalyst precursor J was dried at 110°C, and then calcined at 450°C for 2 hours to obtain a catalyst for producing low-carbon olefins from syngas. The weight of the active component and the composite carrier in the catalyst is 40% and 60% respectively, the weight ratio of ZSM-5 molecular sieve and α-alumina in the composite carrier, and the general composition formula of the atomic ratio of the active component is as follows:

[0043]...

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Abstract

The invention relates to a catalyst for producing low-carbon olefin by using synthesis gas and a preparation method of the catalyst, and is mainly used for solving the problem of low CO conversion rate and low low-carbon olefin selectivity in reaction for preparing the low-carbon olefin by using the synthesis gas in the prior art. The catalyst consists of a composite carrier and active components, wherein the composite carrier consists of alpha-aluminium oxide and a ZSM-5 molecular sieve; the silicon-aluminium ratio of the ZSM-5 molecular sieve is 40-200; the active components are loaded on the composite carrier and comprise the following compounds with chemical formulas by atomic ratio: Fe100AaBbCcOx, A is at least one of transition metals of Cu and Mn, B is at least one of lanthanide La and Ce, and C is at least one of alkaline metals of K and Cs; the weight of the composite carrier is 20%-80% of the weight of catalyst; by weight percent of the composite carrier, the weight of alpha-aluminium oxide is 20%-99% of the weight of the composite carrier. With the adoption of the technical scheme, the problem is well solved; the catalyst can be used for industrial production of the low-carbon olefin produced by using the synthesis gas.

Description

technical field [0001] The invention relates to a catalyst for producing low-carbon olefins from synthesis gas and a preparation method thereof. Background technique [0002] Low-carbon olefins refer to olefins with carbon atoms less than or equal to 4. Low-carbon olefins represented by ethylene and propylene are very important basic organic chemical raw materials. With the rapid growth of my country's economy, the supply of low-carbon olefins has been in short supply for a long time. At present, the production of low-carbon olefins mainly adopts the petrochemical route of cracking light hydrocarbons (ethane, naphtha, light diesel oil). Due to the increasing shortage of global oil resources and the long-term high price of crude oil, the development of low-carbon olefins industry only relies on oil The tubular cracking furnace process with light hydrocarbons as raw materials will encounter more and more raw material problems, and the production process and raw materials of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/48B01J29/46C07C9/02C07C11/02
Inventor 李剑锋陶跃武庞颖聪宋卫林
Owner CHINA PETROLEUM & CHEM CORP
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