Title:
A recovery method of the silver from plating drainage
Document Type and Number:
Japanese Patent JP6001404
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for regenerating water from plating wastewater capable of achieving resource saving and environmental protection by reusing plating wastewater containing silver and cyan as rinsing water in a plating process, and a method for recovering silver from plating wastewater capable of improving a recovery rate of silver from plating water containing silver and cyan, and improving filterability when recovering.SOLUTION: The method for regenerating water from plating wastewater comprises treating plating wastewater containing silver and cyan and having a cyan-containing mole amount greater than an equivalent mole ratio (Ag:CN=1 mol:2 mol) of silver cyanide complex ([Ag(CN)]) with a reverse osmotic membrane to reuse obtained permeated water as rising water in a plating process.The method for recovering silver from plating wastewater comprises treating plating wastewater containing silver and cyan with a reverse osmotic membrane, and adding a hypochlorite to obtained concentrated water to decompose cyan and recover silver.
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Inventors:
Shogo Kato
Toshiki Kasamatsu
Ichiro Suzuki
Masaki Kishimoto
Toshiki Kasamatsu
Ichiro Suzuki
Masaki Kishimoto
Application Number:
JP2012217409A
Publication Date:
October 05, 2016
Filing Date:
September 28, 2012
Export Citation:
Assignee:
dowa Technology Co., Ltd.
DOWA Metal Tech Co., Ltd.
DOWA Metal Tech Co., Ltd.
International Classes:
C22B11/00; B01D61/02; C02F1/44; C02F1/76; C22B3/44; C22B7/00
Domestic Patent References:
| JP55018501A | ||||
| JP2006037194A | ||||
| JP57207585A | ||||
| JP2008253897A | ||||
| JP49084904A |
Attorney, Agent or Firm:
Koichi Hirota
Yoshihiro Nagare
Naoko Matsuda
Yoshihiro Nagare
Naoko Matsuda