SEPARATION METHOD FOR AU CONTAINED IN AU CONTAINING CYANO SOLUTION, AND QUANTITATIVE DETERMINATION METHOD FOR AU CONTAINED IN AU CONTAINING CYANO SOLUTION

• Main Authors: ARAI MITSURU, SHIMIZU TORU, MANABE KOHEI
• Format: Patent
• Language: English
• Published: 10.04.2008
• 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; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; METALLURGY; PHYSICS; 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; TESTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PROBLEM TO BE SOLVED: To carry out a separation method for Au contained in an Au containing cyano solution, and a quantitative determination method for the Au contained in the Au containing cyano solution, in a relatively short period of time, to enhance safety for working, and to reduce a load of an exhaust gas treating device. SOLUTION: An alkali agent is added to the the Au containing cyano solution to prepare an alkaline solution, and Zn is added to the alkaline solution to generate the first precipitate. The first precipitate is further dissolved in an aqua regia to generate a precipitate dissolved solution. A reductant is added to the precipitate dissolved solution to generate the second precipitate, and the second precipitate is heat-treated to separate the Au. COPYRIGHT: (C)2008,JPO&INPIT