RECOVERY PROCESS FOR INDIUM

摘要

RECOVERY PROCESS FOR INDIUM Indium is recovered effectively from an aqueous leached solution containing indium ions, together with other ions such as ferric ions, zinc ions, etc. if any, by adjusting the pH of the aqueous solution to 0.25-4.5, extracting the indium ions from the aqueous solution with an organic solvent solution formed by diluting an extraction reagent containing a monoalkylphosphoric acid and/or a dialkylphosphoric acid and a trialkylphosphoric acid in 1 : 2-5 by volume ratio with a phase-stabilizing waterimmiscible organic solvent and then back-extracting the indium ions in the organic solvent solution with an aqueous sulfuric acid solution.