Autoclave Processing of Concentrates Containing Stable Form of Palladium Oxide

Abstract

Stable modification of palladium oxide and a material modeling the palladium-containing platinum–palladium concentrate poorly soluble in acids were synthesized. It was found that silica is dissolved in alkaline solutions of sodium formate, and palladium oxide is quantitatively reduced under autoclave conditions, which improves the parameters of the subsequent hydrochlorination of the concentrate. Raising the temperature results in that the separation of the palladium phase from alkaline solution is improved and enables separation via decantation.