Die Verteilungskoeffizienten von Dysprosium-, Erbium- und Yttriumnitrat zwischen Tri-n-butylphosphat und 9–12M-Salpetersäure

摘要

The distribution coefficients for the nitrates of Dy, Er and Y betweenTBPand 9, 10, 11, and 12M-HNO3were determined for a wide range of concentrations (20°C). The distribution coefficients of yttrium nitrate were within the experimental error equal to those of erbium nitrate. The separation factors Y/Dy and Er/Dy, resp., showed a flat maximum at 10M-HNO3. By adding NH4NO3(1M) to 10M-HNO3the distribution coefficients were lowered in the same proportion, as to leave the separation factors unchanged