Title:
METHOD FOR PURIFYING SCANDIUM AND SCANDIUM EXTRACTANT
Document Type and Number:
WIPO Patent Application WO/2018/038058
Kind Code:
A1
Abstract:
Provided is a method for efficiently purifying scandium by separating scandium and impurities from an acidic solution which contains scandium and impurities that include iron. A method for purifying scandium according to the present invention subjects an acidic solution, which contains an element component including at least ion, while containing scandium, to solvent extraction by means of a mixed extractant containing a phosphoric acid-based extractant and a neutral extractant, thereby extracting scandium from the acidic solution. It is preferable that the phosphoric acid-based extractant is contained in the mixed extractant at a mixing molar ratio within the range of from 5% to 50% (inclusive). It is also preferable that the pH of the acidic solution is adjusted to a value within the range of from 0.0 to 2.0 (inclusive) before the solvent extraction.
Inventors:
GOTO MASAHIRO (JP)
KUBOTA FUKIKO (JP)
MATSUOKA ITSUMI (JP)
ASANO SATOSHI (JP)
KOBAYASHI HIROSHI (JP)
KUBOTA FUKIKO (JP)
MATSUOKA ITSUMI (JP)
ASANO SATOSHI (JP)
KOBAYASHI HIROSHI (JP)
Application Number:
PCT/JP2017/029807
Publication Date:
March 01, 2018
Filing Date:
August 21, 2017
Export Citation:
Assignee:
UNIV KYUSHU NAT UNIV CORP (JP)
SUMITOMO METAL MINING CO (JP)
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B59/00; B01D11/04; C22B3/38; C22B3/40
Domestic Patent References:
| WO2015022843A1 | 2015-02-19 | |||
| WO2015115269A1 | 2015-08-06 | |||
| WO2015009254A2 | 2015-01-22 |
Foreign References:
| JP2000234130A | 2000-08-29 | |||
| JPH09291320A | 1997-11-11 | |||
| JP2011052250A | 2011-03-17 | |||
| US20080038168A1 | 2008-02-14 |
Other References:
See also references of EP 3505645A4
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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