Effect of TBP on Extraction of REE and TPE from Nitric Acid Solutions with Dibutylphosphoric Acid and Its Zirconium Salt

Research paper by O. V. Shmidt, B. Ya. Zilberman, Yu. S. Fedorov, Yu. V. Palenik, N. D. Goletskii, A. I. Stepanov

Indexed on: 01 Nov '03Published on: 01 Nov '03Published in: Radiochemistry


Solvent effect on extraction of REE and TPE with dibutylphosphoric acid is studied. Over the HNO3 concentration range 0.1-0.5 M, HDBP is a good extractant for REE and TPE, whereas addition of TBP suppresses the extraction. The effect of excess HDBP is similar to the previously observed effect of TBP on extraction of REE. Evidently, free HDBP, like TBP, can enter the solvation shell of a lanthanide with formation of fairly complex, probably polymeric species.