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Comparison of Aromatic Dithiophosphinic and Phosphinic Acid Derivatives for Minor Actinide Extraction

Published online by Cambridge University Press:  01 February 2011

Mason K. Harrup ,
Dean R. Peterman ,
Mitchell R. Greenhalgh ,
Thomas A. Luther  and
John Klaehn
Mason K. Harrup
Affiliation:
[email protected], Idaho National Laboratory, Idaho Falls, ID, 83415, United States
Dean R. Peterman
Affiliation:
[email protected], Idaho National Laboratory, Idaho Falls, ID, 83415, United States
Mitchell R. Greenhalgh
Affiliation:
[email protected], Idaho National Laboratory, Idaho Falls, ID, 83415, United States
Thomas A. Luther
Affiliation:
[email protected], Idaho National Laboratory, Idaho Falls, ID, 83415, United States
John Klaehn
Affiliation:
[email protected], Idaho National Laboratory, Chemical Sciences, P.O. Box 1625, Idaho Falls, ID, 83415-2208, United States
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Abstract

A new extractant for the separation of actinide(III) and lanthanide(III), bis(o-trifluoromethylphenyl)phosphinic acid (O-PA) was synthesized. The synthetic route employed mirrors one that was employed to produce the sulfur containing analog bis(o-trifluoromethylphenyl)dithiophosphinic acid (S-PA). Multinuclear NMR spectroscopy was used for elementary characterization of the new O-PA derivative. This new O-PA extractant was used to perform Am(III)/Eu(III) separations and the results were directly compared to those obtained in identical separation experiments using S-PA, an extractant that is known to exhibit separation factors of ∼100,000 at low pH. The separations data are presented and discussed in terms comparing the nature of the oxygen atom as a donor to that of the sulfur atom in extractants that are otherwise identical.

Keywords

chemical synthesisactinidenuclear magnetic resonance (NMR)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1104: Symposium NN – Actinides 2008—Basic Science, Applications and Technology , 2008 , 1104-NN04-03
Copyright
Copyright © Materials Research Society 2008

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