Hydrometallurgy : Separation of Co , Mn and Zn in Ni-rich Leaching Solution by Na-PC88A
안종관Jong Gwan Ahn,박경호Kyoung Ho Park,손정수Jeong Soo Sohn,안재우Jae Woo Ahn
Abstract
Solvent extraction experiments for the 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. Synthesised and actual leaching solution were used as aqueous phases and PC88A saponified by sodium in kerosene were used as organic phases. The extraction order is Zn>Mn>Co>Ni and extraction percentage of metal ions was increased with an increase of the concentration of extractant, initial pH of aqueous phase and ratio of O/A The separation of Ni and other impurities was effectively accomplished at the condition of extraction stage = 1, O/A = 1, saponified percent 50%, initial pH 5.0, concentration of extractant 1.0M.