Patent ID: 6458184
Filing Date: 2002-10-01
Classification: C22B,C25C,Y02P

Abstract:
A method for recovering zinc metal from metal-containing brine comprising the steps of:(a) reducing the pH of the brine to at least 3.5 to form a pretreated brine; (b) loading the pretreated brine onto a zinc-binding ion exchange chromatography resin to form a zinc-charged resin; (c) washing the zinc-charged resin with an acidic aqueous salt solution to remove zinc-depleted brine; (d) eluting the zinc from the zinc-charged resin with an aqueous solution to form a zinc-containing eluant; (e) extracting the zinc from the zinc-containing eluant into an organic phase by mixing the zinc-containing eluant with a sufficient quantity of cationic organic solvent; and (f) removing the zinc from the organic phase by mixing the organic phase with an aqueous acidic solution.