Mixed-ligand chelate extraction of lanthanides with 1-phenyl-3-methyl-4-(trifluoroacetyl)-5-pyrazolone and some phosphine oxide compounds

摘要: Mixed-ligand chelate extraction of lanthanides (Ln) such as La, Pr, Eu, Ho, and Yb into chloroform with 1-phenyl-3-methyl-4-(trifluoroacetyl)-5-pyrazolone (HPMTFP) one three phosphine oxide compounds is studied. The employed in the present work are tri-n-octylphosphine (TOPO), n-octylphenyl(N,N-diisobutylcarbamoylmethyl)phosphine (CMPO), methylenebis(diphenylphosphine oxide) (MBDPO). Lanthanide ions found to be extracted from a 0.1 M sodium perchlorate medium Ln(PMTFP)/sub 3/(TOPO)/sub 2/ 3/(CMPO), respectively. In mixture HPMTFP MBDPO, species 3/(MBDPO) or 2/(ClO/sub 4/)(MBDPO)/sub absence presence perchlorate, constants these systems do not increase monotonically atomic number but have maximum at Eu Ho. 11 references, 4 tables.