Title:
PRECIOUS METAL RECOVERY METHOD AND PRECIOUS METAL RECOVERY DEVICE
Document Type and Number:
Japanese Patent JP2023037135
Kind Code:
A
Abstract:
To provide a method for recovering a precious metal and a device for recovering a precious metal capable of facilitating dissolution and recovery of a precious metal embedded in a solid polymer membrane of a membrane electrode junction when recovering the precious metal included in a fuel cell and a water electrolysis device to improve the recovery efficiency of the precious metal.SOLUTION: The method for recovering a precious metal from a fuel cell or a water electrolysis device has a cooling step for cooling a membrane electrode junction of the fuel cell or water electrolysis device to a temperature below the freezing point at which water included in the membrane electrode junction is frozen, a solution supply step for supplying a solution and bringing the solution in contact with the membrane electrode junction, a precious metal dissolving step for dissolving a precious metal included in a cathode and anode into the solution by applying a voltage to the membrane electrode junction in contact with the solution.SELECTED DRAWING: Figure 1
Inventors:
YAGYU MOTOSHIGE
KANEMURA SHOHEI
OKABE HIROSHI
KANEMURA SHOHEI
OKABE HIROSHI
Application Number:
JP2021143694A
Publication Date:
March 15, 2023
Filing Date:
September 03, 2021
Export Citation:
Assignee:
TOSHIBA CORP
TOSHIBA ENERGY SYSTEM & SOLUTION CORP
TOSHIBA ENERGY SYSTEM & SOLUTION CORP
International Classes:
H01M8/008; C25B9/23; C25B15/00; H01M4/86; H01M8/10; H01M8/1004
Attorney, Agent or Firm:
Patent Attorney Sakura International Patent Office