The TALSPEAK process has shown considerable utility for the separation of trivalent actinides from trivalent fission product lanthanides. However, the chemistry enabling this separation is complex hindering its application potential. Though the fundamental chemistry of the process is sound, a simplified version is desirable. The pattern of stability of diethylenetriamine-N,N,N',N�,N�-pentaacetic acid  (DTPA)  complexes with lanthanides enables TALSPEAK. In this report,  the potential applicability of dipicolinic acid (pyridine-2,6-dicarboxylic acid, dipic) and selected derivatives of dipic are assessed as potential replacement complexants for DTPA in TALSPEAK and TALSPEAK-like applications. Of particular interest is the need to increase dipic solubility in acidic solutions. To address this issue, several dipicolinic acid analogues have been synthesized. The results of these studies will be discussed in this report.Work supported at WSU and at PNNL by the U.S. Department of Energy Office of Nuclear Energy Science and Technology FCR&D program Sigma Team for Minor Actinide Separations.

Characterization of functionalized dipicolinic acid complexes with actinide and lanthanide

244th National Meeting (2012)

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