THE EXTRACTION OF CADMIUM FROM A MIXTURE OF PHOSPHORIC AND HYDROCHLORIC ACIDS

The feasibility of using trialkylphosphine oxides to remove cadmium from mixed, acidic chloride-phosphate systems was investigated, interpolations from extraction isotherms indicated that raffinates containing very low levels of cadmium (approximately 0.5 mg/L) could be produced readily. Stripping was accomplished with water. The co-extraction of acids was minimal.