PROCESS FOR EXTRACTING GOLD AND(OR) SILVER OUT OF WASTE MATERIALS

FIELD: extraction of gold and(or) silver out of waste materials in electronics, electrochemical and jewellery industry branches. SUBSTANCE: method comprises steps of electrochemical dissolution of gold and silver in aqueous solution at temperature (10 -70)C in presence of complexing agent; using as...

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Hauptverfasser:	BUCHIKHIN E.P, ZHILIN JU.S, BOCHKAREV V.M, KOCHNEVA N.N
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PRETREATMENT OF RAW MATERIALS PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS PRODUCTION AND REFINING OF METALS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	FIELD: extraction of gold and(or) silver out of waste materials in electronics, electrochemical and jewellery industry branches. SUBSTANCE: method comprises steps of electrochemical dissolution of gold and silver in aqueous solution at temperature (10 -70)C in presence of complexing agent; using as complexing agent sodium ethylendiamine tetraacetate with concentration (5 - 150)g/l; realizing dissolution at pH 7 - 14 and electric current density (0.2 -10)A/sq.dm. Invention allows to reduce copper content in slime deposit until (1.5-3)%. EFFECT: possibility for increasing dissolution rate of gold and silver.