Electrodialytic recovery of acid and insoluble products from spent liquors

Claim 1

AN ELECTRODIALYTIC APPARATUS FOR THE REGENERATION AND CONCENTRATION OF ACID FROM A MIXTURE OF SAID ACID AND METAL IN SOLUTION COMPRISING, A FRAME HAVING IN SEQUENCE THEREIN AN ANODE CHAMBER ADAPTED TO CONTAIN CIRCULATING ANOLYTE AND HAVING AN ANODE WITH A SURFACE IN THE ANODE CHAMBER ADAPTED TO BE IN CONTACT WITH THE ANOLYTE; AT LEAST ONE CONCENTRATING CHAMBER ADAPTED TO CONTAIN CIRCULATING ELECTROLYTE; A SPENT LIQUOR CHAMBER ADAPTED TO CONTAIN A CIRCULATING MIXTURE OF SAID ACID AND METAL IN SOLUTION; A CATHODE CHAMBER ADAPTED TO CONTAIN CIRCULATING CATHOLYTE HAVING A CATHODE WITH A SURFACE IN THE CATHODE CHAMBER ADAPTED TO BE IN CONTACT WITH THE CATHOLYTE; ION PERMEABLE MEMBRANES SEPARATING SAID CHAMBERS, THE MEMBRANE SEPARATING THE CATHODE CHAMBER FROM THE SPENT LIQUOR CHAMBER BEING AN ANION PERMSELECTIVE MAMBRANE HAVING ONE SIDE DISPOSED IN THE CATHODE CHAMBER AND THE OTHER SIDE DISPOSED IN THE SPENT LIQUOR CHAMBER, THE ION PERMEABLE MEMBRANE SEPARATING THE ANODE CHAMBER AND THE CONCENTRATING CHAMBER HAVING ONE SIDE DISPOSED IN THE ANODE CHAMBER AND THE OTHER SIDE DISPOSED IN THE CONCENTRATING CHAMBER, AND THE ION PERMEABLE MEMBRANE SEPARATING THE CONCENTRATING CHAMBER AND THE SPENT LIQUOR CHAMBER BEING OF THE TYPE PERMITTING THE MIGRATION OF ANIONS AND HAVING ONE SIDE DISPOSED IN THE CONCENTRATING CHAMBER AND THE OTHER SIDE DISPOSED IN THE SPENT LIQUOR CHAMBER; AN INLET AND OUTLET MEANS FOR EACH CHAMBER AND MEANS FOR CIRCULATING SAID ANOLYTE, CATHOLYTE, ELECTROLYTE AND MIXTURE OF SAID ACID AND METAL IN SOLUTION THROUGH THE RESPECTIVE CHAMBERS; AND MEANS FOR IMPOSING A DIFFERENCE IN POTENTIAL ACROSS THE ANODE AND CATHODE.