Method of preparing olefins from synthetic gas

A technology for synthesis gas and olefins, which is applied in the production of hydrocarbons from carbon oxides, ethylene production, and bulk chemical production. It can solve the problems of large investment, long olefin route, and large consumption of manpower and material resources, so as to increase economic benefits and optimize production efficiency. Technical effect, effect of reducing energy consumption

Active Publication Date: 2019-05-03
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 that the existing coal chemical technology produces olefins with relatively long routes, many types of design technologies, large investment, large consumption of manpower and material resources, and high cost of preparing olefins. Complex logistics process and high energy consumption in the separation process

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  • Method of preparing olefins from synthetic gas
  • Method of preparing olefins from synthetic gas
  • Method of preparing olefins from synthetic gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The molecular sieve in the catalyst system used in the reaction zone is SAPO molecular sieve; the product stream obtained in the reaction zone contains: 25.00% carbon dioxide, 3.40% hydrogen, 46.40% carbon monoxide, 15.70% mixed hydrocarbons, which are sent to the decarburization zone, which uses methyl Diethanolamine is used as an absorbent, the dehydrogenation zone adopts the PSA separation method, and the recycle stream is all recycled back to the reaction zone. The diene (ethylene and propylene) in the product logistics of this technical solution increases by 5.50‰ compared with the existing coal chemical technology, the material consumption decreases by 2.90% compared with the existing coal chemical technology, the energy consumption decreases by 21.26% compared with the existing coal chemical technology, and the waste water output is lower than the existing coal chemical technology. The existing coal chemical technology will reduce 1.004 million tons / year, and the ...

Embodiment 2

[0059] The molecular sieve in the catalyst system used in the reaction zone is 80% SAPO molecular sieve and 20% AlPO 4 Molecular sieve; the product stream obtained in the reaction zone contains: 25.00% carbon dioxide, 3.39% hydrogen, 46.39% carbon monoxide, 15.72% mixed hydrocarbons, sent to the decarburization zone, the decarburization zone uses methyldiethanolamine as the absorbent, and the dehydrogenation zone uses In the PSA separation method, all the recycle streams are recycled back to the reaction zone. The diene (ethylene and propylene) in the product logistics of this technical solution increases by 9.63‰ compared with the existing coal chemical technology, the material consumption is reduced by 2.92% compared with the existing coal chemical technology, the energy consumption is reduced by 21.27% compared with the existing coal chemical technology, and the waste water output is lower than the existing coal chemical technology. The existing coal chemical technology wil...

Embodiment 3

[0061] The molecular sieve in the catalyst system used in the reaction zone is 50% SAPO molecular sieve and 50% AlPO 4 Molecular sieve; the product stream obtained in the reaction zone contains: 25.00% carbon dioxide, 3.38% hydrogen, 46.38% carbon monoxide, and 15.74% mixed hydrocarbons, which are sent to the decarburization zone. The decarburization zone uses methyldiethanolamine as an absorbent, and the dehydrogenation zone uses In the PSA separation method, all the recycle streams are recycled back to the reaction zone. The dienes (ethylene and propylene) in the product logistics of this technical solution increase by 9.63‰ compared with the existing coal chemical technology, the material consumption is 2.94% lower than the existing coal chemical technology, the energy consumption is 21.28% lower than the existing coal chemical technology, and the waste water output is lower than the existing coal chemical technology. The existing coal chemical technology will reduce 1.004 ...

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Abstract

The invention relates to a method of preparing olefins from synthetic gas and mainly solves the problems that production of olefins in the coal chemical industry technology in the prior art is long inroute, relates to a large number of technologies, is large in investment and manpower and material cost, and is high in olefin production cost. The method includes: the synthetic gas flow is reactedin a reaction zone to obtain a product flow; the product flow is separated in a decarbonization zone to obtain a material flow XI, mainly containing CO2, and a decarbonized flow; the decarbonized flowis separated in a dehydrogenation zone to obtain a circulating flow mainly containing CO and H2 and a blend hydrocarbon flow, wherein at least a part of the circulating flow returns to the reaction zone. The technical scheme can solve the problems well and can be used in production of light olefin products. The method is short in process, is low in investment and is low in production cost.

Description

technical field [0001] The invention relates to a method for preparing olefins from synthesis gas, in particular to a method for preparing olefins from synthesis gas in one step. technical background [0002] Olefins, especially ethylene, propylene and butene, are important basic chemical raw materials, and their demand has been increasing in recent years. Generally, olefins mainly come from petroleum processing. With the increasing shortage of petroleum resources, the cost of producing ethylene and propylene from petroleum resources continues to increase, and the development of technologies for producing olefins from non-petroleum resources such as coal or natural gas has attracted more and more attention at home and abroad. [0003] The current mature coal-to-olefins technology route includes four core technologies of coal gasification, synthesis gas purification, methanol synthesis and methanol-to-olefins. Coal-to-olefins first gasifies coal to make syngas; then transfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/04C07C11/04C07C11/06
CPCY02P30/40
Inventor 胡帅杨卫胜
Owner CHINA PETROLEUM & CHEM CORP
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