Title:
鉛電解液のリサイクル方法
Document Type and Number:
Japanese Patent JP6543516
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a technique which makes it possible to reuse a lead electrolyte, which is used in electrolytic refining of crude lead, as an electrolyte even after recovery of thallium.SOLUTION: The recycling method of a lead electrolyte comprises: a thallium recovering step where iodide ions are added to a lead electrolyte containing silicofluoride ions, a leveling agent, and thallium ions, and a thallium ion concentration is made to be, for example, 0.5 to 10 g/L by separating and recovering precipitated thallium iodide crystals; an iodide removal step where silver ions are added to the lead electrolyte, after the recovery of thallium, in a molar ratio relative to iodide ions, Ag/I, of 1 to 10 to precipitate silver iodide crystals, and the precipitated silver iodide is separated and recovered; and a silver recovery step where the lead electrolyte after the iodide removal step is electrolyzed by using lead as an anode and a cathode, and silver is recovered by precipitating metallic silver on a cathode surface.SELECTED DRAWING: Figure 1
Inventors:
Nishigaki vast
Kenji Ichiyasu
Kenji Ichiyasu
Application Number:
JP2015119530A
Publication Date:
July 10, 2019
Filing Date:
June 12, 2015
Export Citation:
Assignee:
DOWA Metals & Mind Co., Ltd.
International Classes:
C22B61/00; C22B3/44; C22B11/00; C25C1/18
Domestic Patent References:
| JP2228488A | ||||
| JP55065382A | ||||
| JP56093887A | ||||
| JP61009588A | ||||
| JP53075195A | ||||
| JP57501431A | ||||
| JP2004137559A |
Attorney, Agent or Firm:
Komatsu Taka