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Title:
GOLD DISSOLUTION METHOD
Document Type and Number:
Japanese Patent JP2017218650
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for effectively hydrochloric acid dissolving gold from a gold-containing article such as a copper electrolytic slime with reducing used amount of hydrogen peroxide or the like.SOLUTION: In a method for hydrochloric acid dissolving gold from a product containing selenium together with gold, hydrochloric acid dissolution of gold is proceeded by maintaining hydrochloric acid concentration of a liquid at 7.5 mol/L to 12 mol/L, preferably oxidation reduction potential of the liquid at 840 mV or less, more preferably at 800 mV to 840 mV together with maintaining the hydrochloric acid concentration of the liquid at 7.5 mol/L to 12 mol/L.SELECTED DRAWING: Figure 2

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Inventors:
HIRAFUJI TETSUJI
MIYAKE MASAO
YOSHITAKE SHUNICHI
TOKITSU SOICHIRO
Application Number:
JP2016115773A
Publication Date:
December 14, 2017
Filing Date:
June 09, 2016
Export Citation:
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Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
C22B11/00; C22B3/10; C22B7/00
Domestic Patent References:
JPH10265863A1998-10-06
JP2001316735A2001-11-16
Foreign References:
US5401296A1995-03-28
Attorney, Agent or Firm:
Hiroshi Chiba



 
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