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Recovery of Palladium from the Alumina-Based Waste Catalysts by Pressurized Alkali Dissolution Method
Pages: 37-41
Year: Issue:  3
Journal: Precious Metals

Keyword:  nonferrous metallurgypalladiumspent catalysthigh pressurealkali solutionaluminum oxiderecovery;
Abstract: The process of recovering palladium from the alumina-based waste catalysts by pressurized alkali dissolution method was studied. At the reaction temperature of 200℃, pressure of 12 kg/cm2, and the reaction time of 6 h in the autoclave, the dissolution efficiency of alumina carrier is more than 95%. With sodium formate as inhibitor, the concentration of palladium in solution can be reduced to less than 0.0005 g/L. By dissolving-refining the purity of sponge palladium could be reached to over 99.98%, and the direct recovery of palladium was 99.02%.
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