Carbon dioxide absorbent solution

A carbon dioxide, absorption liquid technology, applied in the direction of absorption, inorganic chemistry, carbon compounds, etc., can solve the problem of slow absorption and release speed, and achieve the effect of increasing the release speed and the absorption of carbon dioxide.

Inactive Publication Date: 2012-07-04
KK TOSHIBA
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] Alkanolamines are known as absorbents contained in carbon dioxide absorbing liquids, but alkanolamines are slow in absorbing and releasing carbon dioxide

Method used

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  • Carbon dioxide absorbent solution
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  • Carbon dioxide absorbent solution

Examples

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Embodiment 1

[0062] Specific examples of the absorbent represented by Chemical Formula 1 include Absorbent 1 represented by Chemical Formula 5.

[0063] [chemical formula 5]

[0064]

[0065] Absorbent 1 is 1-azezetidine-3-carboxylic acid potassium salt. It has a 4-membered ring composed of 3 carbon atoms and 1 nitrogen atom and potassium carboxylate. Among the carbon atoms constituting the 4-membered ring, a potassium carboxylate salt is bonded to the carbon facing the nitrogen atom.

[0066] Furthermore, the carboxyl group forms a salt with potassium.

[0067] Absorbent 1 and carbon dioxide undergo the reaction shown in Mathematical Formula 1 to produce the product shown in Chemical Formula 6 and the product shown in Chemical Formula 7.

[0068] [chemical formula 6]

[0069]

[0070] [chemical formula 7]

[0071]

[0072] In addition, as another specific example of the absorbent represented by Chemical Formula 1, Absorbent 2 represented by Chemical Formula 8 can be mentione...

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Abstract

Disclosed is a carbon dioxide absorbent solution which can absorb carbon dioxide in a large quantity and rarely causes the precipitation of a material produced by the reaction with carbon dioxide. The carbon dioxide absorbent solution is characterized by comprising an aqueous solution and an amino acid salt that has at least one carboxylic acid salt bound to a heterocyclic ring containing at least one nitrogen atom as a ring-forming element and contained in the aqueous solution.

Description

technical field [0001] The present invention relates to a carbon dioxide absorbing liquid for removing carbon dioxide from mixed gas. Background technique [0002] In recent years, an increase in the concentration of carbon dioxide in the atmosphere has been pointed out as one of the causes of the global warming phenomenon, and opportunities to suppress carbon dioxide emission are increasing. As a method for separating carbon dioxide from the atmosphere, there is known an absorption method in which carbon dioxide is reacted with a carbon dioxide absorbing liquid containing an absorbent to form a product, and the product is recovered. The recovered product is decomposed into carbon dioxide and absorbent and the absorbent is regenerated into carbon dioxide absorbing liquid. [0003] Alkanolamines are known as absorbents contained in carbon dioxide absorbing liquids, but alkanolamines are slow in absorbing and releasing carbon dioxide. Therefore, a hybrid absorbent for carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/62C01B31/20C01B32/50
CPCB01D2252/504B01D2252/20447Y02C10/06B01D2252/20489B01D53/1493B01D2252/20494C01B31/20B01D53/1475C01B32/50Y02C20/40Y02P20/151
Inventor 村井伸次斋藤聪村松武彦前泽幸繁久保木贵志加藤康博吉村玲子渡户裕子近藤亚里
Owner KK TOSHIBA
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