|About this Abstract
||Part C-2: Gordon Ritcey Symposium: Advances in Hydrometallurgical Solution Purification Separations
||Liquid-liquid Extraction of Cobalt(II), Nickel(II) and Manganese(II) from Acidic Chloride Media
||Alexandre Chagnes, Kateryna Omelchuk
|On-Site Speaker (Planned)
Co, Ni and Mn are used in many applications including alloys manufacturing, electrode materials for lithium batteries, etc. The search of new extractants for Co-Ni-Mn separation at low pH is of great concern. In this work 6 new cationic exchangers have been synthesized. Their physicochemical properties have been investigated by determining their pKa, association constants and distribution constants between kerosene and acidic chloride solutions by potentiometry, vapour pressure osmometry and UV-Vis spectroscopy, respectively. These data have been implemented in a physicochemical model for calculating the the variation of the extraction efficiency vs. pH. Such a model is thus used to investigate the speciation in kerosene of the new extractants and the metal-extractants complexes. The ability of these extractants to selectively recover Co, Ni and Mn from acidic chloride media at low pH based on the speciation deduced from the model and the physicochemistry of extraction will be discussed.
||Planned: At-meeting proceedings