FIELD: metallurgy. SUBSTANCE: for increase of silver degree purification and increased yield of affinated silver to the ready production it is boiled in sodium hydroxide solution before dissolving in nitric acid. Sodium hydroxide is added to silver nitrate solution before treatment with sodium nitrite up to pH 6.0-6.5. Impurity precipitate is separated by filtration and treatment with sodium nitrite is carried out up to complete silver precipitation. EFFECT: improved method of affinated silver preparing. 1 dwg
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