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|1. (WO2015122397) SCANDIUM SEPARATION METHOD|
|Applicants:||A SCHOOL CORPORATION KANSAI UNIVERSITY
ISHIHARA SANGYO KAISHA, LTD.
|Title:||SCANDIUM SEPARATION METHOD|
This scandium separation method comprises: a step (step S1) in which an acidic water-soluble solution having a pH of less than 4 and containing scandium is prepared; a step (step S2) in which a first acidic water-soluble fluid is generated by mixing the acidic water-soluble solution and an alkali and adjusting the pH to a range of 4-7; a step (step S3) in which a scandium-containing organic solvent is generated by bringing into contact with each other the first acidic water-soluble fluid and an organic solvent including, as an extracting agent, carboxylic acid and/or carboxylate, and transferring the scandium in the first acidic water-soluble fluid to the organic solvent; and a step (step S4) in which a scandium-containing water-soluble fluid is generated by brining into contact with each other the scandium-containing organic solvent and a second acidic water-soluble fluid and transferring the scandium in the scandium-containing organic solvent to the second acidic water-soluble fluid.