Method for making a bipolar membrane and use of resulting bipolar membrane
AssigneeSolvay (Societe Anonyme)
InventorsEllenio Mischi, Davide Mantione, Alessandra Pastacaldi, Luc Botte
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Abstract
A process for producing a bipolar membrane is described in which a cationic membrane undergoes a treatment with a salt from a group 8 metal, an anionic membrane undergoes a treatment with a salt of a transition metal not belonging to group 8, and then the two membranes are conjoined and, before and/or after having been conjoined, the membranes are brought into contact with a treatment solution selected from alkaline aqueous solutions, aqueous metal sulphate solutions and aqueous metal sulphite solutions.
Claims10
Process for producing a bipolar membrane, in which a cationic membrane and an anionic membrane undergo a treatment with a metal salt, the two membranes are conjoined and, before and/or after conjoining the two membranes, they are brought into contact with a treatment solution selected from alkaline aqueous solutions, aqueous metal sulphate solutions and aqueous metal sulphite solutions, characterized in that a salt of a metal from group 8 of the periodic table of the elements is selected to treat the cationic membrane, and a salt of a transition metal that does not belong to group 8 is selected to treat the anionic membrane.
Dependencies are inferred from the claim text.