Recovery of Platinum Group Metals Using Perovskite-Type Oxide

Abstract

A large amount of platinum group metals (PGMs) are used in automobile catalyst. It is important to recover the metals from wasted catalyst. Nomura et al [1] suggested a recovery process that PGM oxides were absorbed to perovskite-type oxide based on LaScO₃. In this study, the PGM oxide absorption properties of various perovskite-type oxides are investigated to develop a new recovery process. This process has the potential to separate each element in the process if the perovskite-type oxide is selected properly. Some of perovskite-type oxides were synthesized with metallic platinum, palladium or rhodium at high temperature in air atmosphere. And the PGM contents in the oxide are determined by chemical analysis. Then a new recovery process of PGMs from wasted automobile catalyst, in which PGMs can be separate to each element, was designed.