Abstract
The anion exchange behavior of scandium, the rare earths and thorium has been investigated in mixtures of acetic acid and hydrochloric acid. These elements do not adsorb to any great extent on a strong base type anion exchange resin from hydrochloric acid, but their adsorption characteristics are greatly improved by introducing acetic acid into the system. The elements concerned thus become moderately adsorbed on the resin from a medium consisting of 90% glacial acetic acid and 10% 3 N hydrohchloric acid. Differences in the distribution coefficients are large enough to permit a sharp separation of scandium and the rare earths (or yttrium) in this medium. The rare earths (or yttrium) are eluted first, and then scandium can easily be removed from the column by elution with dilute hydrocholoric acid.
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