Abstract
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.
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