|About this Abstract
||Part C-2: Gordon Ritcey Symposium: Advances in Hydrometallurgical Solution Purification Separations
||Equilibrium Modeling of Solvent Extraction and Stripping of Copper(II), Nickel(II), and Ammonia for Ammoniacal Process Using LIX 84-I
||Shubin Wang, Jie Li, Hirokazu Narita, Tanaka Mikiya
|On-Site Speaker (Planned)
Copper(II) and nickel(II) are often separated by a process via ammoniacal alkaline solutions using hydroxyoxime extractant: both of copper(II) and nickel(II) are extracted from ammoniacal alkaline solutions and, from the loaded organic phase, nickel(II) is selectively stripped with a dilute acid followed by copper(II) stripping with an acid of higher concentration. Since a small portion of ammonia is co-extracted with copper and nickel, the extracted ammonia should be scrubbed using a dilute acid before metal stripping. In the present study, a mechanistic model has been developed in order to support design and control of this process. The equilibrium distribution ratios of copper(II), nickel(II), and ammonia at 298K using LIX84-I as the extractant are successfully correlated by considering the relevant equilibria. Based on these results, quantitative prediction of equilibrium distribution ratios in the process has been made possible, and suitable conditions for the efficient separation of copper(II) and nickel(II) are discussed.
||Planned: At-meeting proceedings