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Method for directly producing low-carbon olefins from synthetic gas

A technology for low-carbon olefins and synthesis gas, which can be used in the production of hydrocarbons from carbon oxides, the production of bulk chemicals, chemical instruments and methods, etc., and can solve the problems of low selectivity of low-carbon olefins.

Active Publication Date: 2019-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the low selectivity of low-carbon olefins in the prior art, and a method f

Method used

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  • Method for directly producing low-carbon olefins from synthetic gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] 1. Catalyst preparation

[0085] Get 402.40 grams of ferric nitrate (Fe(NO 3 ) 3 9H 2 O), add 500g water dissolving, obtain material I, get 95.28 grams of 50% copper nitrate (Cu(NO 3 ) 2 ), 57.40 grams of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) In the same container, add 200g of water, stir and dissolve to obtain material III.

[0086] Materials I and III are mixed, and 312.50 grams of 40% (weight) silica sol materials are added under stirring, then 50 g of an aqueous solution containing 2.00 grams of KOH is added, and the pH value of the above-mentioned slurry is adjusted with a concentration of 27% (weight) ammonia water so that The pH of the mixed slurry is 6.0, and the slurry prepared after fully stirring is subjected to microsphere formation in a spray dryer. The specific spray drying conditions are that the inlet temperature of the sprayer is 300°C, and the outlet temperature is 200°C. Finally, internal diameter is 89 millimeters, and length is 2.0 hours in 5...

Embodiment 2

[0105] 1. Catalyst preparation

[0106] Get 394.90 grams of ferric nitrate (Fe(NO 3 ) 3 9H 2 O), add 500g water dissolving, obtain material I, get 93.51 grams of 50% copper nitrate (Cu(NO 3 ) 2 ), 14.90 grams of magnesium nitrate (Mg(NO 3 ) 4 ·5H 2 O), 56.30 grams of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) In the same container, add 200g of water, stir and dissolve to obtain material III.

[0107] Materials I and III are mixed, and 312.50 grams of 40% (weight) silica sol materials are added under stirring, then 50 g of aqueous solution containing 1.97 grams of KOH is added, and the pH value of the above-mentioned slurry is adjusted with a concentration of 27% (weight) ammonia water so that The pH of the mixed slurry is 6.0, and the slurry prepared after fully stirring is subjected to microsphere formation in a spray dryer. The specific spray drying conditions are that the inlet temperature of the sprayer is 300°C, and the outlet temperature is 200°C. Finally, internal di...

Embodiment 3

[0126] 1. Catalyst preparation

[0127] Get 391.00 grams of ferric nitrate (Fe(NO 3 ) 3 9H 2 O), add 500g water to dissolve, obtain material I, get 92.59 grams of 50% copper nitrate (Cu(NO 3 ) 2 ), 55.80 grams of cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) and 9.69 grams of silver nitrate (AgNO 3 ) into the same container, add 200g of water, stir and dissolve to obtain material III.

[0128] Materials I and III are mixed, and 312.50 grams of 40% (weight) silica sol materials are added under stirring, then 50 g of an aqueous solution containing 1.95 grams of KOH is added, and the pH value of the above-mentioned slurry is adjusted with a concentration of 27% (weight) ammonia water so that The pH of the mixed slurry is 6.0, and the slurry prepared after fully stirring is subjected to microsphere formation in a spray dryer. The specific spray drying conditions are that the inlet temperature of the sprayer is 300°C, and the outlet temperature is 200°C. Finally, internal diameter ...

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Abstract

The invention relates to a method for directly producing low-carbon olefins from synthetic gas in order to mainly solve the problem of low selectivity of low-carbon olefins in the prior art. The method for directly producing low-carbon olefins from synthetic gas is characterized in that the synthetic gas is reacted in the presence of an iron-based catalyst for directly producing low-carbon olefinsfrom synthetic gas in order to generate the low-carbon olefins, the catalyst comprises a carrier and an active component, and the active component comprises a composition having the following formula, by atomic ratio, Fe100CuaCobAcKdOx, wherein A comprises at least one selected from group IIA elements and/or at least one selected from rare earth elements; and the carrier accounts for 30-70% of the weight of the catalyst. The method well solves the problem, and can be used in industrial production for synthesizing low-carbon olefins from synthetic gas in a fluidized bed.

Description

technical field [0001] The invention relates to a method for directly producing light olefins from synthesis gas. Background technique [0002] The method of converting synthesis gas into hydrocarbons through catalyst action was invented by German scientists Frans Fischer and Hans Tropsch in 1923, referred to as F-T synthesis, that is, CO undergoes a heterogeneous catalytic hydrogenation reaction on a metal catalyst to produce linear alkanes and alkenes The process of the main mixture. Germany carried out research and development in the 1920s and realized industrialization in 1936. After World War II, it was closed because it could not compete economically with the oil industry; South Africa has abundant coal resources, but lacks oil resources and has long-term Restricted by international social economic and political sanctions, it was forced to develop coal-to-oil industrial technology, and built the first coal-based F-T synthetic oil plant (Sasol-1) with a production capa...

Claims

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Application Information

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IPC IPC(8): C07C1/04C07C11/04C07C11/06C07C11/08C07C11/09C07C11/16B01J23/78B01J23/83B01J23/89
CPCB01J23/78B01J23/83B01J23/8946B01J2523/00C07C1/044C07C2523/78C07C2523/83C07C2523/89B01J2523/13B01J2523/17B01J2523/41B01J2523/845B01J2523/842B01J2523/22B01J2523/18B01J2523/3712C07C11/04C07C11/06C07C11/08C07C11/09C07C11/16Y02P20/52
Inventor 陶跃武庞颖聪李剑锋宋卫林
Owner CHINA PETROLEUM & CHEM CORP