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Catalyst for preparing low-carbon olefin from synthesis gas by one-step method, preparation method and application of catalyst

A technology of low-carbon olefins and catalysts, applied in the field of catalysts, can solve the problems of low selectivity of low-carbon olefins and low conversion rate of CO, and achieve the effect of improving the selectivity of low-carbon olefins, increasing the conversion rate, and increasing the quantity

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of low conversion rate of CO and low selectivity of low-carbon olefins in the product in the technology of producing low-carbon olefins from syngas in the prior art, and provides a new method for producing low-carbon olefins from syngas in one step , the method uses a new type of fixed-bed Fischer-Tropsch synthesis to produce low-carbon olefins iron-cobalt bimetallic catalyst, which has the advantages of high conversion rate of CO and high selectivity of low-carbon olefins in the product

Method used

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  • Catalyst for preparing low-carbon olefin from synthesis gas by one-step method, preparation method and application of catalyst
  • Catalyst for preparing low-carbon olefin from synthesis gas by one-step method, preparation method and application of catalyst

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Effect test

Embodiment 1

[0027]Weigh 100.0 grams of 60-80 mesh coconut shell activated carbon, wash with dilute nitric acid and deionized water, dry at 120°C for 4 hours to make carrier H for use; mix 101.2 grams of ferric nitrate nonahydrate, 10.9 grams of cobalt nitrate hexahydrate, Strontium nitrate, 12.3 grams of ammonium tetrahydrate heptamolybdate, and 7.0 grams of erbium nitrate pentahydrate were dissolved in 35.0 grams of deionized water to make mixed solution I; The catalyst precursor J is obtained on the prepared coconut shell activated carbon carrier H; the impregnated catalyst precursor J is dried at 120°C, and then roasted at a temperature of 600°C for 3 hours to obtain the required synthesis gas in one step Catalyst for legal production of low carbon olefins. The prepared catalyst comprises the following components in weight percent: 20% Fe 2 o 3 , 3% Co 3 o 4 , 9% SrO, 10% MoO 3 , 3% Er 2 o 3 , 55% C (coconut shell activated carbon, the same below); the prepared catalyst was subj...

Embodiment 2

[0030] Weigh 100.0 grams of 60-80 mesh coconut shell activated carbon, wash with dilute nitric acid and deionized water, and dry at 120°C for 4 hours to make carrier H for use; 303.6 grams of ferric nitrate nonahydrate, 3.6 grams of cobalt nitrate hexahydrate, 8.2 grams Strontium nitrate, 4.9 grams of tetrahydrated ammonium heptamolybdate, 2.3 grams of pentahydrated erbium nitrate were dissolved in 20.0 grams of deionized water to make mixed solution I; The catalyst precursor J is obtained on the prepared coconut shell activated carbon carrier H; the impregnated catalyst precursor J is dried at 120°C, and then roasted at a temperature of 600°C for 3 hours to obtain the required synthesis gas in one step Catalyst for legal production of low carbon olefins. The prepared catalyst comprises the following components in weight percent: 60% Fe 2 o 3 , 1% Co 3 o 4 , 4% SrO, 4% MoO 3 , 1% Er 2 o 3 , 30% C; under certain conditions, the prepared catalyst was used for the one-step...

Embodiment 3

[0033] Weigh 100.0 grams of 60-80 mesh coconut shell activated carbon, wash with dilute nitric acid and deionized water, and dry at 120°C for 4 hours to make carrier H for use; 25.3 grams of ferric nitrate nonahydrate, 3.6 grams of cobalt nitrate hexahydrate, 8.2 grams Strontium nitrate, 4.9 grams of ammonium heptamolybdate tetrahydrate, and 2.3 grams of erbium nitrate pentahydrate are dissolved in 35.0 grams of deionized water to make mixed solution I; The catalyst precursor J is obtained on the prepared coconut shell activated carbon carrier H; the impregnated catalyst precursor J is dried at 120°C, and then roasted at a temperature of 600°C for 3 hours to obtain the required synthesis gas in one step Catalyst for legal production of low carbon olefins. The prepared catalyst comprises the following components in weight percent: 5% Fe 2 o 3 , 1% Co 3 o 4 , 4% SrO, 4% MoO 3 , 1% Er 2 o 3 , 85% C; under certain conditions, the prepared catalyst was used for the one-step ...

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Abstract

The invention relates to a catalyst for preparing low-carbon olefin from synthesis gas by a one-step method and a preparation method of the catalyst, which are mainly used for solving the problems of low CO conversion rate and low selectivity of low-carbon olefin in the reaction for preparing low-carbon olefin from synthesis gas in the prior art. The catalyst adopted by the invention comprises the following components in percentage by weight: (a) 5-60% of ferrum element or an oxide of the ferrum element; (b) 1-10% of cobalt element or an oxide thereof; (c) 4-20% of at least one element or an oxide thereof selected from strontium or magnesium; (d) 4-20% of at least one element or an oxide thereof selected from molybdenum and zirconium; (e) 1-10% of erbium element or an oxide thereof; and (f) 30-85% of a cocoanut active charcoal carrier. By adopting the technical scheme, the problem is solved well, and the catalyst and the preparation method thereof can be applied to the industrial production for preparing the low-carbon olefin from synthesis gas by using a fixed bed.

Description

technical field [0001] The invention relates to a catalyst for preparing low-carbon olefins by one-step method of synthesis gas, a preparation method of the catalyst and an application 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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/882B01J23/83C07C1/04C07C11/02C10G2/00
Inventor 李剑锋陶跃武宋卫林庞颖聪
Owner CHINA PETROLEUM & CHEM CORP
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