Title:
COBALT EXTRACTION METHOD
Document Type and Number:
WIPO Patent Application WO/2013/069563
Kind Code:
A1
Abstract:
The objective of the present invention is to selectively extract cobalt from an acidic solution containing a high concentration of manganese. This cobalt extraction method extracts cobalt from an acidic solution containing manganese and cobalt by subjecting the acidic solution to solvent extraction by means of a valuable metal extraction agent comprising an amide derivative represented by general formula (I). The valuable metal extraction agent is represented by the general formula. In the formula: R1 and R2 each represent the same or different alkyl group; R3 represents a hydrogen atom or an alkyl group; and R4 represents a hydrogen atom or any given group aside from an amino group bonded to the α carbon as an amino acid. Preferably, the general formula has a glycine unit, a histidine unit, a lysine unit, an aspartic acid unit, or an N-methylglycine unit. Preferably, the pH of the acidic solution is 3.5-5.5 inclusive.
Inventors:
GOTO MASAHIRO (JP)
KUBOTA FUKIKO (JP)
BABA YUZO (JP)
KUBOTA FUKIKO (JP)
BABA YUZO (JP)
Application Number:
PCT/JP2012/078446
Publication Date:
May 16, 2013
Filing Date:
November 02, 2012
Export Citation:
Assignee:
UNIV KYUSHU NAT UNIV CORP (JP)
SUMITOMO METAL MINING CO (JP)
SUMITOMO METAL MINING CO (JP)
International Classes:
B01D11/04; C22B3/26; C22B23/00; H01M10/54
Foreign References:
| EP0834581A1 | 1998-04-08 | |||
| JP2010174366A | 2010-08-12 | |||
| JP2000234130A | 2000-08-29 |
Other References:
HIROFUMI MORIZONO ET AL.: "Liquid-liquid extraction of transition metal ions with an alkylhistidine extractant", SEPARATION AND PURIFICATION TECHNOLOGY, vol. 80, no. 2, 29 July 2011 (2011-07-29), pages 390 - 395, XP028237907
K. SHIMOJO; H. NAGANAWA; J. NORO; F. KUBOTA; M. GOTO: "Extraction behavior and separation of lanthanides with a diglycol amic acid derivative and a nitrogen-donor ligand", ANAL. SCI., vol. 23, December 2007 (2007-12-01), pages 1427 - 30, XP002597764, DOI: doi:10.2116/analsci.23.1427
K. SHIMOJO; H. NAGANAWA; J. NORO; F. KUBOTA; M. GOTO: "Extraction behavior and separation of lanthanides with a diglycol amic acid derivative and a nitrogen-donor ligand", ANAL. SCI., vol. 23, December 2007 (2007-12-01), pages 1427 - 30, XP002597764, DOI: doi:10.2116/analsci.23.1427
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
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Claims: