FIELD: noble metals refining, namely improved degree of noble metal extraction from their alloys with enhanced purity degree.
SUBSTANCE: method comprises steps of melting initial material; saturating it with gaseous composition for forming impurity compounds in the form of saturation products and removing them. Saturation is performed with use of gaseous composition including at least two gaseous components for forming compounds with impurities at constant super-high pressure. Impurity compounds are removed by adsorption of saturation products due to filtering melt in vacuum through filter of sorption material with large specific surface. Temperature of heating filter exceeds temperature of melt.
EFFECT: improved degree of noble metal extraction, enhanced purity degree of extracted metals.
7 cl, 2 ex
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