Craig-Verteilung von Seltenerdnitraten im System Tri-n-Butylphosphat—Salpetersäure, 2. Mitt.

摘要

In an apparatus of 80 stages the preparativeCraigdistribution of yttrium earth mixtures was investigated by systematic variation of the experimental conditions, the performance being characterised by the effective distribution coefficients, separation factors and effective distribution stages. By withdrawal of the upper phase a separation of practical value resulted up to gadolinium, by withdrawal of the lower phase a rough separation of dysprosium and yttrium and a concentration of the heavy yttrium earths. 55–62 of the input (50–60 g yttrium earth mixture) were separated in a purity better than 90 or 99, part of the samarium and neodymium better than 99