期刊
HYDROMETALLURGY
卷 71, 期 3-4, 页码 371-377出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0304-386X(03)00088-4
关键词
phosphoric acid; uranium; solvent extraction; PN-1200; synergistic mixture; D(2)ERPA+TOPO; D(2)EHPA+TRPO
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% P2O5 phosphoric acid using PN-1200 was compared with uranium extraction from phosphoric acid using synergistic mixtures of D(2)EHPA+TOPO and D(2)EHPA + 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 U4+ and U6+. (C) 2004 Elsevier B.V. All rights reserved.
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