Abstract
Extraction of rare earth element(III) (REE) ions from chloride solutions with mixtures of 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone and 2-phosphorylphenoxyacetamides in organic solvents has been studied. Observed considerable synergic effect is related to the formation of hydrophobic mixed-ligand REE(III) complexes. The stoichiometry of extracted complexes has been determined and extraction constants have been calculated. Effect of aqueous phase composition, organic solvent nature, and 2-phosphorylphenoxyacetamide structure on the efficiency of REE(III) ions recovery into organic phase has been considered.
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