Development of a New Recycling Process of PGM from Metal-Supported Catalyst Using Complex Oxide

摘要

A large amount of platinum group metals (PGM) are used in automobile catalyst. It is important to recover the metals from wasted catalyst. PGM in the catalyst are supported by ceramics for four-wheel vehicle or metals such as stainless steel for two-wheel ones. The recycling process of PGM from the metal-supported catalyst has not been developed, while the process for ceramic-supported catalyst was developed, such as Rose process. We designed a noble recycling process of PGM from metal-supported catalyst using complex oxides between PbO and PGM oxide. In this study, complex oxides, PbPt_2O_4, PbPdO_2, PbRh_2O_4 and so on were synthesized at about 773-973 K. And the dissolution behavior of these compounds to hydrochloric acid was investigated. PbPt_2O_4 and PbPdO_2 were dissolved to hydrochloric acid easily, but PbRh_2O_4 was not.