Title:
METHOD FOR SEPARATING AND COLLECTING METALS FROM PLATING MEDIUM, AND METHOD FOR RECYCLING PLATING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2019/181088
Kind Code:
A1
Abstract:
In a used plating medium, a metal surface layer is dissociated from a core and dissolved with an acid to thereby give an aqueous mixed metal solution 13 containing Ni ions 9 and Sn ions 11. Then, the aqueous mixed metal solution 13 is passed through a column 17 packed with anion exchange fibers 15 and thus the Sn ions 11 are selectively adsorbed by the anion exchange fibers 15. As a result, the Sn ions 11 are separated from the aqueous mixed metal solution 13 and an aqueous Ni ion solution 19 containing the Ni ions 9 alone can be collected. The Sn ions 11 can be desorbed from the anion exchange fibers 15 and collected by passing through water as a eluent. Thus, Ni and Sn can be separated and collected at high accuracy from the plating medium merely by using a small amount of the acid and water.
Inventors:
NAKAMURA HIDEMI (JP)
Application Number:
PCT/JP2018/044935
Publication Date:
September 26, 2019
Filing Date:
December 06, 2018
Export Citation:
Assignee:
NAKAMURA HIDEMI (JP)
TOHO SHOUTON CO LTD (JP)
TOHO SHOUTON CO LTD (JP)
International Classes:
C22B3/24; C25D17/16; C22B23/00; C22B25/00; C25C1/08; C25C1/14; C25D7/00
Foreign References:
| JPH04301098A | 1992-10-23 | |||
| JPS5524520B2 | 1980-06-30 |
Attorney, Agent or Firm:
SUGITANI Tsutomu (JP)
Download PDF:
Previous Patent: BONDED BODY OF PIEZOELECTRIC MATERIAL SUBSTRATE AND SUPPORTING SUBSTRATE
Next Patent: PORTABLE POWER-SUPPLYING DEVICE
Next Patent: PORTABLE POWER-SUPPLYING DEVICE