SEPARATE GOLD AND SILVER EXTRACTION METHOD FROM THIOCYANATE SOLUTIONS

摘要

FIELD: metallurgy.;SUBSTANCE: method includes gold extraction in the form of thiocyanate complex by extraction by solution of tributyl phosphate in burning oil at concentration of thiocyanate-ions 0.8-1.2 mol/l. Additionally thiocyanate complexes of gold are transferred into organic phase. Then thiocyanate solution is dissolved by water and it is implemented extraction of silver at concentration of thiocyanate-ions 0.4-0.6 mol/l by extraction by mixture of tributyl phosphate-diphenyl thiocarbamide. Additionally thiocyanate complexes of silver are transferred into organic phase. Then it is implemented re-extraction of gold and silver from organic phases.;EFFECT: increasing of noble metals extraction ratio at simultaneous decreasing of process time.;6 cl, 1 tbl, 17 ex