Solvent extraction of lanthanoid elements by high molecular weight .BETA.-diketones

Shigeto NAKAMURA, Yosyong SURAKITBANHARN, Kenichi AKIBA
1989 Analytical Sciences  
The extraction behavior of Lanthanoid elements has been investigated using such $-diketone derivatives (HA) as dodecylbenzoy trifluoroacetone (LIX 51), benzoy isooctanoylmethane (LIX 54) and dibenzoy methane (DBM) in kerosene. Trivalent Lanthanoid ions (M3+) were extracted as tris-l3-diketonate (MA3); the extraction tendency followed the sequence LIX 51>LIX 54>DBM. The extraction constants (KeX) for lanthanoid elements increased with an increase in their atomic number, and a "tetrad effect" was
more » ... approximately observed for each extraction system. The mean separation factor between adjacent elements was evaluated to be 1.71 for LIX 51, 1.95 for LIX 54 and 2.23 for DBM.
doi:10.2116/analsci.5.739 fatcat:n7ornh25j5ctpo3enpidbxndgi