Indium Production
Indium Production
Wastes of lead-zinc and tin production may serve as main raw material for Indium processing. Leaching and extraction by kerosene solution of di-2-ethylhexylphosphor acid or by ion exchange, for instance, on phosphate cation-exchange materials.
Indium is extracted by electrolysis or by Indium displacement from the solution: In3+ + Al0 => In0 + Al3+) with following smelting under alkali layer. Then electrolytic refining methods such as zone melting, vacuum volatile impurities treatment and crystals drawing from the fusion are applied.