Recovery of precious metals from materials containing same

Details Recovery of precious metals from materials containing same Recovery of precious metals from materials containing same

C - Chemistry, Metallurgy

22

B

53/168, 53/225

C22B 11/06 (2006.01)

Patent

CA 1228989

"RECOVERY OF PRECIOUS METALS FROM MATERIALS CONTAINING SAME" Abstract of the Disclosure The recovery of precious metals from materials containing same is effected by leaching the precious metal in an acidic aqueous medium contain- ing chloride ions and a strong oxidizing agent to form a soluble chloride complex of the precious metal and thereafter separating the metal from the complex thus formed. According to the invention, the chloride ions are derived at least in part from a non-acidic chloride-containing leaching agent which is non-volatile and soluble in the acidic aqueous medium without crystallizing under the leaching conditions. The invention is particularly useful for recovering platinum and palladium from automobile catalytic converters. - 1 -

464865

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