Actinide separation using solubility difference of the TBP complexes with their nitrates in supercritical carbon dioxide

摘要

The uranium separation from the mixture of tri-n-butylphosphate (TBP) complexes of uranyl and neodymium nitrates was carried out in CO_2 at 313 K, 11 MPa. The concentration ratio of uranium to neodymium increased up to 1.5 times of the initial ratio, and it agreed well with the ratio estimated based on their solubilities in CO_2.