Recovery of pt/rh from car exhaust catalysts

Details Recovery of pt/rh from car exhaust catalysts Recovery of pt/rh from car exhaust catalysts

B - Operations, Transporting

01

J

53/168

B01J 23/96 (2006.01)

Patent

CA 1048277

ABSTRACT OF THE DISCLOSURE. In order to recover platinum, rhodium and other precious metals from catalysts employed in internal combustion engine exhaust systems, the used or unused catalysts, preferably in crushed, powdered or broken form, are reacted with an acidic medium having oxidising properties to leach out the precious metals. The acidic medium may be an acid containing or oxidising agent or an oxidising acid and when a used catalyst is treated the leaching step is preferably preceded by a reduction step in order to convert to the metal any precious metal oxides present in the catalyst. -1-

229014

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