Title:
貴金属の回収方法および回収システム
Document Type and Number:
Japanese Patent JP6076925
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide precious metal recovery method and recovery system capable of recovering precious metal from MEA by simple device configuration.SOLUTION: A method of recovering precious metal from the membrane electrode assembly of a fuel cell includes a dissolution step for immersing the membrane electrode assembly into process liquid containing chloride ions, and dissolving the precious metal, as a complex, into the process liquid, a precipitation step for precipitating the precious metal, dissolved into the process liquid, as metal powder, by using a sacrificial agent and a photocatalyst, and a recovery step for recovering the metal powder by performing solid-liquid separation of the process liquid, containing the metal powder and sacrificial agent, to the metal powder and a liquid phase where the metal powder is removed.
Inventors:
Koji Negishi
Masato Okamura
Motoshige Yagyu
Kanamura Shohei
Masato Okamura
Motoshige Yagyu
Kanamura Shohei
Application Number:
JP2014033857A
Publication Date:
February 08, 2017
Filing Date:
February 25, 2014
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H01M4/88; B01J23/46; B01J35/02; B01J38/00; C02F1/32; C02F1/70; C22B11/00; H01M4/92; H01M8/04
Domestic Patent References:
| JP63171641A | ||||
| JP2009108374A | ||||
| JP2010100908A | ||||
| JP2007266124A |
Foreign References:
| US20090301260 |
Attorney, Agent or Firm:
Patent Business Corporation Sakura International Patent Office