METHOD FOR SULFIDE PURIFICATION OF INDIUM-CONTAINING SOLUTIONS

摘要

nonferrous metallurgy. SUBSTANCE: arsenic, antimony, copper, and iron are removed from solutions by the aid of alkali metal sulfide containing 5-9 g/l sodium hydroxide and 100-120 g/l sodium sulfide, the latter being consumed in amount 150-170% of amount stoichiometrically required for precipitation of antimony, arsenic, copper, and iron(III). EFFECT: increased recovery of indium and avoided hydrogen sulfide emission. 2 cl, 3 tbl, 3 ex