Solvent Extraction Behavior of Neptunium (IV) Ions between Nitric Acid and Diluted 30% Tri-butyl Phosphate in the Presence of Simple Hydroxamic Acids

Journal Article · Tue Jan 15 04:00:00 EST 2008 · Solvent Extraction and Ion Exchange, 26(1):41-61

DOI:https://doi.org/10.1080/07366290701784159· OSTI ID:927287

Taylor, Robin J; Sinkov, Sergey I; Choppin, Gregory R; May, Iain

Formo- and aceto-hydroxamic acids are very effective reagents for stripping tetravalent actinide ions such as Np(IV) and Pu(IV) ions from a tri-butyl phosphate phase into nitric acid. Distribution data for Np(IV) in the presence of these hydroxamate ions have now been accumulated and trends established. Stability constants for aceto-hydroxamate complexes of Np(IV) and Np(V) ions have also been determined in a perchlorate medium, and these reaffirm the affinity of hydroxamate ligands for actinide (IV) ions over actinyl (V,VI) ions.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 927287
• Report Number(s): PNNL-SA-59296
• Journal Information: Solvent Extraction and Ion Exchange, 26(1):41-61, Journal Name: Solvent Extraction and Ion Exchange, 26(1):41-61 Journal Issue: 1 Vol. 26; ISSN 0736-6299; ISSN SEIEDB
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
AFFINITY
Advanced Purex
Formohydroxamic acid
HYDROXAMIC ACIDS
NEPTUNIUM
NITRIC ACID
SOLVENT EXTRACTION
TBP
VALENCE
acetohydroxamic acid