Collect. Czech. Chem. Commun. 1992, 57, 1639-1646

Extraction of Ce, Pm, Eu, Tm and Sc Using Di-n-butylhydrogenphosphate in 1,1,2,2-Tetrachlorodifluoroethane

Petr Sládeka, Oldřich Navrátila and Petr Linhartb

a Department of Military and Special Chemistry, Military University, 682 03 Vyškov
b Institute of Civil Defence, 530 02 Pardubice


A study was carried out of the extraction of Ce, Pm, Eu, Tm and Sc from aqueous HNO3 medium into an organic phase 1,1,2,2-tetrachlorodifluoroethane (CFC-112, Ledon-112) using di-n-butylhydrogenphosphate (HDBP) as extracting reagent. The organic solvent was studied from the point of view of some of its interesting properties that can be utilized in practical applications of liquid extraction. Especially the dependence of the extraction of selected lanthanoids on the HDBP concentration and pH was studied and constants K2 and KD(HA) were found for this reagent in CFC-112 and mixtures of this solvent with benzene.