Title:
廃ニッケル水素電池からの有価金属の回収方法
Document Type and Number:
Japanese Patent JP6402535
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a low-cost and efficient method for recovering valuable metals from a waste nickel hydrogen battery where cost reduction in a facility, electric power or the like is attained, and treatment time and working steps required for the treatment are reduced.SOLUTION: In a leaching-crystallizing step S11, a leaching reaction of leaching, e.g., valuable metals such as nickel and cobalt and a crystallizing reaction of crystallizing out rare earth elements such as lanthanum are progressed in one reaction tank. More concretely, a variable metal-containing material obtained from a waste nickel hydrogen battery is added with a sulfuric acid solution and the sulfate of alkali metal to obtain a mixture of leaching residue and the precipitates of the double sulfate mixed precipitates of rare earth elements and a rare earth element-removed solution, and from the obtained rare earth element-removed solution, the valuable metals such as nickel and cobalt are separated and recovered.SELECTED DRAWING: Figure 1
Inventors:
Takumi Mano
Hitoshi Ishida
Hitoshi Ishida
Application Number:
JP2014168087A
Publication Date:
October 10, 2018
Filing Date:
August 21, 2014
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
C22B23/00; C22B3/08; C22B3/44; C22B7/00; C22B59/00; H01M10/54
Domestic Patent References:
| JP9082371A | ||||
| JP2013001916A | ||||
| JP2003041326A | ||||
| JP54089904A | ||||
| JP2014118598A | ||||
| JP2012025992A | ||||
| JP10510878A | ||||
| JP2013139616A | ||||
| JP2012229483A |
Foreign References:
| EP2444507A1 |
Attorney, Agent or Firm:
Akira Koike
Seiji Iga
Seiji Iga