title: Synergic extraction of lanthanoids by mixtures of LIX 54 (high molecular weight beta-diketone) and bidentate neutral amines.
abstract: The synergic extraction of lanthanoids has been investigated using mixtures of high molecular weight beta-diketone, LIX 54 (HA; major component, 1-phenyl-3-isoheptyl-1,3-propanedion) and bidentate neutral ligands (S) in toluene. The distribution behavior of bidentate amines (2,2'-bipyridine (bpy), 1,10-phenanthroline (phen) and 2,9-dimethyl-1,10-phenanthroline (dmp)) was investigated and their related equilibrium constants were evaluated. The synergic effect is produced by the formation of such adduct complexes as MA3 x S. The extraction constants with LIX 54 alone and those in the presence of bidentate ligands were determined for lanthanoid-series elements.
authors.affiliation: Hachinohe National College of Technology, Tamonoki, Japan.
authors.forename: Shigeto
authors.initials: S
authors.lastname: Nakamura
authors.forename: Shuichi
authors.initials: S
authors.lastname: Takei
authors.forename: Kenichi
authors.initials: K
authors.lastname: Akiba