Method for making a bipolar membrane and use of resulting...

Details Method for making a bipolar membrane and use of resulting... Method for making a bipolar membrane and use of resulting...

C - Chemistry, Metallurgy

08

J

C08J 5/22 (2006.01) B01D 61/44 (2006.01) C01D 1/40 (2006.01)

Patent

CA 2406964

The invention concerns a method for making a bipolar membrane which consists in: treating a cationic membrane with a group 8 metal salt; treating an anionic membrane with a transition metal salt not belonging to group 8; and conjoining the two membranes, the latter being contacted, before and after being conjoined, with a treatment solution selected among aqueous alkaline solutions, aqueous metallic sulphate solutions and aqueous metallic sulphite solutions.

Procédé de fabrication d'une membrane bipolaire, selon lequel on soumet une membrane cationique à un traitement avec un sel d'un métal du groupe 8, on soumet une membrane anionique à un traitement avec un sel d'un métal de transition n'appartenant pas au groupe 8 et on accole ensuite les deux membranes, celles-ci étant mises en contact, avant et/ou après avoir été accolées, avec une solution de traitement qui est sélectionnée parmi les solutions aqueuses alcalines, les solutions aqueuses de sulfate métallique et les solutions aqueuses de sulfite métallique.

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