Title:
PRODUCTION OF HIGH PURITY COBALT SOLUTION
Document Type and Number:
Japanese Patent JP3661911
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for effectively producing cobalt chloride solution which can be supplied to an electrolytic obtaining of high purity cobalt metal by economically and efficiently removing impurities such as copper, zinc, calcium from a cobalt water solution obtd. as a by-product in a nickel refining process, etc.
SOLUTION: From the cobalt water solution containing the calcium, copper and zinc as the impurities, these impurities are extracted and separated in an organic solvent by using a mixed organic solvent extracting agent composed of organic phosphoric acid type and oxime type to obtain the high purity cobalt solution. The organic solvent after extraction is brought into contact with a water solution with an adjusted pH, and the cobalt coextracted in the organic solvent is selectively and reversely extracted and recovered. Further, the organic solvent after recovering the cobalt is brought into contact with a water solution with an adjusted pH, and the impurities are reversely extracted, separated and recovered to regenerate the organic solvent.
Inventors:
Yoshichi Ozaki
Masaki Imamura
Kazuyuki Takaishi
Naoyuki Tsuchida
Masaki Imamura
Kazuyuki Takaishi
Naoyuki Tsuchida
Application Number:
JP21983297A
Publication Date:
June 22, 2005
Filing Date:
July 31, 1997
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
C01G51/00; C22B3/20; C22B23/00; (IPC1-7): C22B23/00; C01G51/00; C22B3/20
Domestic Patent References:
| JP60050128A | ||||
| JP62263938A | ||||
| JP4236792A | ||||
| JP8085895A | ||||
| JP54015471A | ||||
| JP52106370A |
Other References:
日本化学会,分離精製技術ハンドブック,丸善,1990年,第135頁~第140頁
Attorney, Agent or Firm:
Yoshiteru Oshida
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