Title:
RECOVERY METHOD AND RECOVERY APPARATUS OF PRECIOUS METAL
Document Type and Number:
Japanese Patent JP2017008340
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a recovery method of precious metals capable of efficiently recovering the precious metals without generating subsidiary harmful materials from an electrical conductor to which the precious metals adhere.SOLUTION: A recovery method of precious metals comprises: an electrolysis step S100 of applying electric potential to an electrical conductor 2 and dissolving the precious metals in electrolytic solution a in a state where the electrical conductor 2 is immersed into the electrolytic solution a; a chlorine gas recovery step S300 of recovering chlorine gas generated from the electrolytic solution a; a chloride ionization step S400 of obtaining chloride ions by bringing the chlorine gas into contact with an electrode surface applied with the electric potential; and a chloride ion concentration increase step S500 of adding the chloride ions obtained to the electrolytic solution a.SELECTED DRAWING: Figure 1
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Inventors:
OKAMURA MASAHITO
YAGYU MOTOSHIGE
KANEMURA SHOHEI
YAGYU MOTOSHIGE
KANEMURA SHOHEI
Application Number:
JP2015121867A
Publication Date:
January 12, 2017
Filing Date:
June 17, 2015
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
C25B1/26; C22B7/00; C22B11/00; C25C1/20; C25C7/06; H01M4/86; H01M4/88
Attorney, Agent or Firm:
Patent Business Corporation Sakura International Patent Office