Grouped An back-extraction study

The optimised experimental conditions were tested on grouped An back-extraction experiments. Table 6.3.4 summarises the extraction efficiencies of U, Pu, Am and Nd after contacting the three metal ingots prepared by reductive liquid/liquid extraction, with CaCl2-LiCl -b AICI3, that is runs El, C and E2. The AlCl3/An ratio was set equal to approximately seven for the three experiments. 

The Nd back-extraction is also important, that is 90% for run El and C and 85% for run E2. No selectivity between An and Ln was expected in these experiments which demonstrates the importance, for the complete process, of a good An/Ln separation during the reductive extraction step. 

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