Recovery and Mutual Separation Process of Noble Metals from Simulated Insoluble Residue of Spent Fuel

Abstract

ABSTRACTRecent results on the various methods for the recovery and the mutual separation of Mo, Ru, Rh and Pd from the simulated insoluble residue in the reprocessing plant, such as liquid lead and zinc extractions, nitric acid dissolution and preferential oxidative vaporization in various atmospheres by the authors are briefly reviewed. By combining these results, four kinds of processes for the recovery and the mutual separation of Mo, Ru, Rh and Pd (and Tc) i.e. two processes composed of Pb (and Zn) extraction(s) and subsequent nitric acid dissolution, and two processes using vaporization in various oxidizing atmospheres at various temperatures are proposed.