Extraction liquide‐liquide par des esters alkylphosphoriques. III. Séparation de la paire yttrium – gadolinium par l'acide di‐(2‐éthylhexyl)phosphorique

The separation of yttrium and gadolinium by solvent extraction with di‐(2‐ethylhexyl)phosphoric acid (H(DEHP)) from solutions in HNO3 has been studied. The extraction takes place by the same mechanism for both elements. The extraction by the ion‐exchange reaction is more selective than the extraction by the solvatation reaction. Methyl isobutyl ketone, compared to kerosene as diluent for H(DEHP), reduces more the extraction of Y than that of Gd, without affecting the mechanisms.