FIELD: chemistry.
SUBSTANCE: method includes leaching the obtained cinder with a chloride solution, which contains an oxidant or a mixture of oxidants, to extract platinum and/or palladium from the leaching solution. Oxidising roasting of the catalyst is carried out at 500-800°C. Leaching is carried out with saturated aluminium chloride solution in an apparatus with a fixed bed of the product being leached, followed by extraction of platinum and/or palladium from the leaching solution by sorption on an anion-exchange resin.
EFFECT: method improves effectiveness of treating deactivated catalysts and simplifies the process scheme.
6 cl, 1 dwg, 1 ex
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