ELECTRODIALYTIC CONVERSION OF MULTIVALENT METAL SALTS USING SULFONATE IONS

摘要

Multivalent metal cations in aqueous solution are electrotransported efficiently and with high capacity through cation permeable membranes into an aqueous solution containing a sulfonate ion which makes possible a simple electrodialytic process for conversion of all salts of multivalent metal cations into the respective acids or halogens of the anions of the salts and into water soluble salts or water insoluble salts or ionically immobile compounds of the multivalent metal cations. The use of a sulfonate ion the acid of which in a one normal solution would have a pH no greater than three (3) prevents fouling of the membrane and makes electrodialytic conversion of especially salts of barium, strontium, calcium and lead simple, efficient and with high capacity without the formation of undesirable products of electrolysis at the cell anode or cathode.