Effect of TBP on Solvent Extraction of Np(V) with n-Octyl(pheny1)-N, N-Diisobutylcarbamoylmethylphosphine Oxide

1 January 1992

journal article
Published by Taylor & Francis in Journal of Nuclear Science and Technology

Vol. 29 (3) , 263-283
https://doi.org/10.3327/jnst.29.263

Abstract

Solvent extraction of Np(V) from nitric acid solution by n-octyl(phenyl)N-N diisobutylcarbamoylmethylphosphine oxide (CMPO) in the presence and absence of tri-n-butyl phosphate (TBP) has been studied using decalin and n-dodecane as diluents. Without the TBP, Np(V) can be extracted using CMPO in decalin with extraction equation: The maximum Np(V) distribution ratio using 0.65 M CMPO in decalin from 2 M nitric acid is 4. The net effect of TBP to CMPO at 2M nitric acid is slight suppression of Np(V) distribution ratio. However, at low CMPO concentration (0.2 M≥) after the Np(V) distribution ratio reaches the minimum value, the distribution ratio gradually increases as the TBP concentration increases. No synergistic interaction of CMPO and TBP has been observed.

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