METHOD OF BINDING, TRANSPORTING, ACTIVATING REACTION, CHEMICAL CONVERSION, STORAGE AND RELEASE OF WATER-SOLUBLE GASES Russian patent published in 2025 - IPC B01D53/14 C01F7/77 C01B32/50 

FIELD: chemistry.

SUBSTANCE: invention is aimed at a method for selective binding, selective membrane transport and/or storage of carbon dioxide (CO₂) in aqueous media. Method involves providing an aqueous acceptor solution containing at least one acceptor compound containing a free guanidine and/or amidine group, which is brought into contact with a gas containing carbon dioxide in order to bind carbon dioxide in the acceptor solution. Carbon dioxide or carbon dioxide derivatives bound in the acceptor solution are transported through a separating membrane into an aqueous absorbing and releasing medium, or an acceptor solution containing bound carbon dioxide or carbon dioxide derivatives is stored and/or transported.

EFFECT: thus obtained acceptor solutions containing bound carbon dioxide are suitable for storage of carbon dioxide in aqueous media, for re-extraction of carbon dioxide and for use in the context of electrochemical methods, for example electrodialysis, for the purpose of selective transport of bound carbon dioxide through separation membranes into aqueous media.

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