| The waste platinum alloy catalytic gauze produced by the nitrate industry has extremely high economic value. It was proposed to recover platinum, palladium and rhodium from waste platinum alloy catalytic gauze by adopting the process of aqua regia dissolution-ammonium chloride precipitation for separating platinum-ammonia complexation for separating palladium-refining. The results show that the purity of sponge Pt, Pd and Rh are >99.99%, 99.95% and 99.95%, respectively, and their corresponding direct recovery rates are 98.6%, 98.5%, 97.1%. |
