INVESTIGATION OF INORGANIC ION EXCHANGE MEMBRANES FOR ELECTRODIALYSIS

The mixed oxides of Groups III, IV and V were investigated as selective ion exchangers for incorporation into electrodialysis membranes. Aluminum vanadate precipitated from acid solution demonstrated reversible cation exchange properties and, if precipitated from a basic solution, it demonstrated reversible anion exchange properties. Rigid membranes formed by pressing and sintering techniques had high cation and anion selective properties and moderate resistivities. Flexible membranes formed from aluminum vanadate exchangers and organic binders demonstrated only cation selectivity and higher resistivities than pure inorganic membranes. © 1969.