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Method for supplying carbon dioxide to synthesize urea

A technology of carbon dioxide and urea, applied in chemical instruments and methods, preparation of organic compounds, separation methods, etc., can solve problems such as not having a nominal output

Active Publication Date: 2021-05-04
THYSSENKRUPP IND SOLUTIONS AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

No operational fully integrated plant currently known to have a nominal output (e.g. 1000 metric tons per day)

Method used

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  • Method for supplying carbon dioxide to synthesize urea

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Embodiment Construction

[0063] A gas stream A(1) comprising hydrogen, nitrogen, carbon monoxide, carbon dioxide and possibly inert with respect to the ammonia synthesis unit is preferably fed in a steam reformer, optionally an autothermal reformer. other components such as methane or argon. At least a portion of the carbon dioxide present in the gas stream A ( 1 ) is preferably removed in the separation device ( 2 ) by means of an ammonia-water separator. Here, the formed carbon dioxide-depleted gas stream B (4) is fed to an ammonia synthesis unit (5), in which at least part of the hydrogen and nitrogen in the gas stream B (4) are At least a portion of is converted to ammonia. A product stream (6) comprising mainly ammonia, hydrogen and nitrogen is withdrawn from the ammonia synthesis unit (5). At least part of the ammonia in the product stream (6) is separated off in the ammonia removal unit (7) and fed to the urea synthesis unit (13) as ammonia gas stream (9). At least a portion of the ammonia m...

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Abstract

The present invention relates to a method for 2 A method for separating carbon dioxide from gas and a device for supplying carbon dioxide to synthesize urea.

Description

technical field [0001] The present invention relates to a method for 2 A method for separating carbon dioxide from gas and a device for supplying carbon dioxide to synthesize urea. Background technique [0002] Currently, the industrial production of urea is almost exclusively based on high-pressure synthesis in urea at approximately 150 bar and approximately 180° C. based on ammonia and carbon dioxide. [0003] The two feedstocks for urea synthesis are generally supplied in an ammonia plant, usually in the immediate vicinity of the urea plant involved. The carbon dioxide required for urea synthesis is obtained in the synthesis gas product of the ammonia plant as a component of the reformed crude synthesis gas. Since carbon dioxide acts as a catalyst poison in ammonia synthesis, it must be separated from the synthesis gas. In the prior art, it is known for this purpose to use regenerative gas separators in which there is a relatively large amount of selectively acting sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C273/10C01B3/02C01C1/04
CPCC01B3/025C01C1/0405C01B2203/0415C01B2203/0475Y02P20/52C07C273/10Y02C20/40B01D53/1475
Inventor 叶甫根尼·马克尼拉约阿希姆·约翰宁丹妮拉·多斯塔尔
Owner THYSSENKRUPP IND SOLUTIONS AG
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