Abstract
A new efficient extractant of polyalkyl phosphazenes, PN-1200 (supplied by All-Russian Research Institute of Chemical Technology), was used for the separation of uranium from wet process phosphoric acid (PA) in a batch process at laboratory scale. Solvent extraction of uranium from 29% P 2O 5 phosphoric acid using PN-1200 was compared with uranium extraction from phosphoric acid using synergistic mixtures of D 2EHPA+TOPO and D 2EHPA+TRPO. All extractants were diluted in normal aliphatic kerosene. It is concluded that PN-1200 has some good properties, such as high uranium distribution coefficient, good stability, acceptable kinetics, good phase separation, and simultaneous extraction of U 4+ and U 6+.
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