Lanthanoid ions solvent extraction with 4-benzoyl-3-phenyl-5-isoxazolone: Synergistic effects in the presence of long chain alkylammonium salts

The synergistic solvent extraction of selected trivalent lanthanoids (La, Nd, Eu, Ho and Lu) with mixtures of a chelating extractant 4-benzoyl-3-phenyl-5-isoxazolone (HBPI) and tridodecylammonium perchlorate (TDDAHClO4) or methyldioctylammonium perchlortae (MDOAHClO4) in C6H6 has been studied. The composition of the extracted complexes has been determined as TDDAH[Ln(BPI)4] or MDOAH[Ln(BPI)4]. The values of equilibrium constants as well as those of synergistic coefficients and separation factors were calculated. The extraction mechanism has been discussed.

The synergistic solvent extraction of selected trivalent lanthanoids (La, Nd, Eu, Ho and Lu) with mixtures of a chelating extractant 4-benzoyl-3-phenyl-5-isoxazolone (HBPI) and tridodecylammonium perchlorate (TDDAHClO4) or methyldioctylammonium perchlortae (MDOAHClO4) in C6H6 has been studied. The composition of the extracted complexes has been determined as TDDAH[Ln(BPI)4] or MDOAH[Ln(BPI)4].Figure optionsDownload as PowerPoint slideResearch highlights▶ La, Nd, Eu, Ho and Lu were synergistically extracted. ▶ 4-Benzoyl-3-methyl-5-isoxazolon and high molecular ammonium salts were used. ▶ Anionic mixed complexes AmH+[Ln(BPI)4]− (AmH = MDOAH or TDDAH) were obtained. ▶ Synergistic agent is the alkylammonium perchlorate. ▶ The two combinations offer higher synergistic enhancements and better selectivity.