Solvent Extraction Research and Development, Japan
Online ISSN : 2188-4765
Print ISSN : 1341-7215
ISSN-L : 1341-7215
Notes
Separation of Scandium from Yttrium in Aqueous Chloride Media by Solvent Extraction with an Acidic Phosphinate Extractant
Jeong-yi MOONEmi YAMADASyouhei NISHIHAMAKazuharu YOSHIZUKA
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2019 Volume 26 Issue 2 Pages 99-104

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Abstract

Separation of scandium (Sc) from yttrium (Y) in aqueous chloride media was investigated by solvent extraction with bis(2,4,4-trimethylpentyl)phosphinic acid (Cyanex 272). Conventional slope analysis method revealed the extraction equilibrium formulation of the metals. Sc is more strongly extracted than Y by Cyanex 272, and the separation factor of the metals is quite high at 2.82 × 105. Complete stripping of Sc from the loaded organic solution of Cyanex272 could not be achieved, even with a high concentration of hydrochloric acid. Addition of 1-octanol as a modifier to the organic phase decreased the extractability of Sc, leading to successful stripping of Sc from the loaded organic solution.

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© 2019 Japan Association of Solvent Extraction
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