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US 8,282,710 B2Granted
Amidium-based ionic liquids for carbon dioxide absorption
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsSeok Jin Choi, Jelliarko Palgunadi, Je Eun Kang, Hoon Sik Kim, Sung Yeup Chung
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Abstract
The present invention relates to a carbon dioxide absorbent, an ionic liquid obtained by reacting amide and an organic acid and a method of using the same. The amidium-based ionic liquid of the present invention has excellent CO2 absorption capability, which is hardly reduced even with repeated use, is easy to synthesize and has low manufacturing cost thus being useful as a CO2 absorbent.
Claims7
A method of separating carbon dioxide from a gas mixture comprising:
- (a) absorbing carbon dioxide using a carbon dioxide absorbent which is an ionic liquid, the carbon dioxide absorbent comprising an amidium-based cation and an anion of an organic acid represented by the following formula 1:
- wherein R1 is C1-C8 alkyl or C5-C15 aryl;
- R2 is C1-C6 alkyl or C5-C15 aryl;
- R3 is C1-6 alkyl, C1-C6 haloalkyl or C5-C15 aryl, and
- (b) stripping said absorbed carbon dioxide from said carbon dioxide absorbent.
2 more elements
A method of separating carbon dioxide from a gas mixture comprising:
- absorbing carbon dioxide using a carbon dioxide absorbent which is an ionic liquid, the carbon dioxide absorbent comprising an amidium-based cation and an anion of an organic acid represented by the following formula 1:
- wherein R1 is C1-C8 alkyl or C5-C15 aryl;
- R2 is C1-C6 alkyl or C5-C15 aryl;
- R3 is C1-C6 alkyl, C1-C6 haloalkyl or C5-C15 aryl.
1 more element
Dependencies are inferred from the claim text.