Dissolution of Palladium Metal in Solvent Leaching System with the Presence of Oxidizing Agent

Platinum group metals (PGMs) are important for the manufacture of advanced materials in field catalysts and electronic devices. Since chemical properties PGMs very similar to each other, hydrometallurgical processes should be employed recover with high purity from either ores or secondary resources. In PGMs, first step is dissolution PGMs. For this purpose, inorganic acid solutions oxidizing agents generally employed. work, nonaqueous solvent leaching systems a relatively cheap price were investigate pure palladium (Pd) metal. The consisted concentrated hydrochloric solution commercial extractants such as tributyl phosphate (TBP), 7-hydroxydodecan-6-one oxime (LIX 63), di-n-octyl sulfide (DOS) presence H2O2 an agent. Among three systems, TBP showed best efficiency Pd. effect several parameters like concentration, temperature, time, stirring speed weight ratio Pd TBP/HCl/H2O2 was explored. percentage by HCl–H2O2–TBP system higher than HCl–H2O–H2O2 at same concentration HCl H2O2. role enhancing discussed on basis interaction between TBP. Compared aqueous mass transfer metal system. Optimum conditions complete obtained.