PROCESS FOR THE RECOVERY AND THE SELECTIVE SEPARATION OF PLATINUM, PALLADIUM AND RHODIUM FROM SPENT MOTOR VEHICLE CATALYSTS

摘要

The invention relates to a process for the recovery and the selective separation of platinum, palladium and rhodium from spent motor vehicle catalysts, by solubilization, in two steps. In the first step, the rhodium is solubilized by treating it with H2SO4 having a concentration of 2M, at a temperature of 100...105 C. In the second step, the platinum and the palladium are solubilized by treating them with HCl having a concentration of 4.5...7M and H2O2 having a concentration of 30%.