Title:
METHOD FOR RECOVERING SCANDIUM
Document Type and Number:
WIPO Patent Application WO/2021/059942
Kind Code:
A1
Abstract:
The present invention provides a method for recovering scandium, said method being capable of efficiently recovering high-purity scandium from a solution that contains impurities together with scandium. The present invention is a method for recovering scandium, said method comprising: a neutralization step S3 wherein a solution containing scandium is passed through an ion exchange resin, an eluent eluted from the ion exchange resin is neutralized by adding a neutralizing agent and dimethylglyoxime thereto, and subsequently a neutralized sediment and a neutralized filtrate are obtained by means of solid-liquid separation; a solvent extraction step S4 wherein the eluent after neutralization is subjected to a solvent extraction treatment; and a scandium recovery step S5 wherein scandium oxide is recovered from an extraction residue that is separated by means of the solvent extraction treatment.
Inventors:
HIGAKI TATSUYA (JP)
WATANABE HIROTO (JP)
WATANABE HIROTO (JP)
Application Number:
PCT/JP2020/033775
Publication Date:
April 01, 2021
Filing Date:
September 07, 2020
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B59/00; C22B3/26; C22B3/42; C22B3/44
Domestic Patent References:
| WO2017130692A1 | 2017-08-03 |
Foreign References:
| JP2018204088A | 2018-12-27 | |||
| JPS6333530A | 1988-02-13 | |||
| JPS4843405B1 | 1973-12-18 | |||
| JPH09194211A | 1997-07-29 |
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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