Equilibria of the Systems, PrCl3-HCl, NdCl3-HCl and PrCl3-NdCl3-HCl with Di-(2-ethyl hexyl) Phosphoric Acid in Amsco 125-82

1 January 1965

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

Vol. 2 (10) , 410-415
https://doi.org/10.3327/jnst.2.410

Abstract

Extractions of Pr and Nd by 1.0 M di-(2-ethyl hexyl) phosphoric acid (D2EHPA) in Amsco**** 125-82 were carried out from PrCl₃-HCl and NdCl₃-HCl aqueous solutions with initial concentrations from 0.0 to 1.0 M HCl and 0.10 to 1.0 M PrCl₃ or NdCl₃. Distribution coefficients of Pr and Nd were obtained as a function of initial concentration of HCl with initial concentrations of Pr and Nd as parameters. Concentrations of Pr and Nd in both organic and aqueous phases for the systems 1.00 M D2EHPA-PrCl₃-HCl and 1.00 M D2EHPA-NdCl₃-HCl were also obtained using HCl concentrations in the aqueous phase at equilibrium as the parameter. Plots of these data were demonstrated to be useful for estimating final concentrations of Pr and Nd in the organic phase for the extractions of PrCl₃-HCl, NdCl₃-HCl and PrCl₃-NdCl₃-HCl solutions when the composition of the aqueous phase in equilibrium was known.

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