The Palladium Complexes During Thermal Decomposition Phase Composition Investigation

Abstract

In palladium refining technologies, as well as in some analytical procedures, complexes of bivalent palladium with diimines, amines, oximes, thiourea, and other compounds are used. In the technologies used, complex compounds of palladium are subjected to thermal decomposition, during which metallic palladium is formed. The precious metals market is seeing a rapid rise in the price of palladium on the back of a rapid increase in demand for it. It has been experimentally shown that active decomposition of dichlorodiamminepalladium Pd(NH3)2Cl2 and dimethylglyoximpalladium (C4H7N2O2)2Pd occurs at temperatures of 200…250 °C. Only the diffraction maxima of palladium were observed on the X-ray diffraction patterns of samples that underwent heat treatment at 900 °C and above. At these temperatures, palladium oxide is not stable. At temperatures around 500 °C, the samples are almost completely oxidized; there are no reflections of palladium on the diffraction patterns.