Title:
METHOD FOR RECOVERING PLATINUM-GROUP METAL
Document Type and Number:
WIPO Patent Application WO/2022/138982
Kind Code:
A1
Abstract:
In a positive electrode for electrolytic plating, a titanium-iridium laminate is used. Therefore, it is desired to recovery a resource after disposal. However, these substances are extremely stable. Therefore, it is not easy to separate and recover these substances. Furthermore, it has been found that, when it is attempted to detach iridium using a constant current, the dissolution of titanium that is a metal base material occurs at once. Therefore, it is difficult to achieve both of the recovery of the metal base material in an undamaged form and the highly efficient recovery of a platinum-group metal. The present invention is a method for recovering a platinum-group metal from a laminate comprising a metal base material and a layer of the platinum-group metal formed on the metal base material, the method including a step for immersing the laminate in a fluorine-containing aqueous solution and then applying a positive constant voltage to the laminate. This method can solve the above-mentioned problem.
Inventors:
SHIMADA KAZUYA
HAYAMIZU MASAHITO
KOIKE KEITO
SAKATA TOSHIHIKO
HAYAMIZU MASAHITO
KOIKE KEITO
SAKATA TOSHIHIKO
Application Number:
PCT/JP2021/048591
Publication Date:
June 30, 2022
Filing Date:
December 27, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
C22B7/00; C22B11/00
Foreign References:
| JPH07109594A | 1995-04-25 | |||
| JPS4832252B1 | 1973-10-04 | |||
| JPS63270421A | 1988-11-08 | |||
| JPS5188424A | 1976-08-03 |
Attorney, Agent or Firm:
HIROKOH Masaki (JP)
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