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
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