Abstract
Solvent extraction experiments for separation of impurities from Ni-rich solution were carried out for manufacturing of high purity Ni compounds from acid leaching solution of spent Ni–Cd secondary battery. Artificial and leaching solutions were used as aqueous phases and PC88A saponified by sodium in kerosene were used as organic phase. The extraction order is Zn>Mn>Co>Ni and extraction percentage of metal ions was increased with increase of the concentration of extractant, initial pH of aqueous phase and ratio of O/A . The separation of cobalt, zinc and manganese from nickel was effectively accomplished at the condition of extraction stage=1, O/A=1 and initial pH 5.0 with 1.0 mol/dm3 PC88A saponified to 50% with NaOH.
