Acta Chim Slov. 2020 Mar;67(1):246-252.
The solvent extraction of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu from weak acidic chloride solutions into an organic phase containing 4-benzoyl-3-methyl-1-phenyl-5-pyrazolone (HP) and phosphoryl-containing podands (L) has been studied. A considerable synergistic effect was observed in the presence of neutral ligands L in the organic phase containing HP. The stoichiometry of the Ln(III) extracted species was determined by slope analysis and the equilibrium constants were calculated. It was found that the lanthanide(III) ions are extracted with mixtures of HP and neutral ligands in toluene from weak acidic solutions as LnLP3 complexes.
已研究了从弱酸性氯化物溶液中用含有 4-苯甲酰基-3-甲基-1-苯基-5-吡唑啉酮（HP）和含磷配体（L）的有机相萃取镧、铈、镨、钕、钐、铕、钆、铽、镝、钬、铒、铥、镱和镥。在含有 HP 的有机相中存在中性配体 L 时，观察到相当大的协同效应。通过斜率分析确定了Ln(III)萃取物种的化学计量比，并计算了平衡常数。结果表明，镧系元素（III）离子从弱酸性溶液中以 HP 和中性配体的混合物形式用甲苯萃取，作为 LnLP3 配合物。
