Cation exchange membrane selectively permeable to monovalent cations and method for its production
AssigneeAsahi Glass Company, Limited
InventorsYoshio Sugaya, Motoo Fukui, Yoshiharu Aoki
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Abstract
The present invention provides a cation exchange membrane which has excellent durability, a high limiting current density, a low direct current membrane resistance and excellent selectivity to monovalent cations. In the present invention, a cation exchange membrane excellent in selective permeability to monovalent cations is produced by bringing high molecular cations into contact with a surface of a cation exchange membrane in the presence of anions of an oxyacid or anions of an organic sulfonic acid.
Claims8
A cation exchange membrane selectively permeable to monovalent cations, which has, on at least one side of thereof, a surface treated by contact with high molecular cations in the presence of anions of an oxyacid or ions of an organic sulfonic acid.
A method for producing a cation exchange membrane selectively permeable to monovalent cations, which comprises contacting at least one surface of the cation exchange membrane with high molecular cations in the presence of anions of an oxyacid and ions of an organic sulfonic acid.
Dependencies are inferred from the claim text.