METHOD OF PRODUCING NOBLE METALS FROM CARBONACEOUS MATERIALS

• Main Authors: BARBIN N.M, VATOLIN N.A, MOISEEV G.K, KAZANTSEV G.F
• Format: Patent
• Language: English; Russian
• Published: 27.06.1998
• Edition: 6
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; 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; 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

FIELD: chemical industry, more particularly recovery of noble metals from waste products, catalysts and other materials on carbonaceous carrier. SUBSTANCE: carbonaceous material is treated using alkali metal carbonates. Initial material in amount of 2.6-6.0 % by weight of carbonates is charged onto surface of carbonate melt and maintained at 930-1100 C till complete oxidation of carbon. Prior to charging initial material, metal collector is added to carbonate melt. The carbonate melt includes mixture of sodium and potassium carbonates in 1:(0.3-1) ratio, and metal collector includes lead. More efficient treatment of carbonaceous material containing noble metals and greater recovery of crude lead comprising up to 50% gold and silver. EFFECT: more efficient production method. 3 cl, 2 dwgt