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Process for the Recovery of Actinide and Lanthanide Oxides via Thermal Decomposition and Calcination of Loaded Diglycolamide Resin

Journal Article · · Nuclear Technology
 [1];  [1];  [1];  [1]
  1. Savannah River National Laboratory (SRNL), Aiken, SC (United States)
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Diglycolamide (DGA) resin, a product produced by Eichrom Technologies, Inc. employs TODGA (N,N,N',N'-tetraoctyldiglycolamide) as the active extractant, which will be used by Savannah River National Laboratory to extract trivalent actinides and lanthanides from dissolved irradiated Mark-18A targets. The final form of the extracted material will be an oxide suitable for shipment. A two-step process was developed and validated for the direct recovery of actinides and lanthanides loaded on I-grade DGA resin as nitrates by thermally drying and decomposing resin loaded with Nd(III), a surrogate for trivalent actinides and lanthanides, under inert conditions followed by calcining the resultant residue in air to provide an oxide product. Further, a stepwise heating profile up to 385°C under argon gas flow resulted in 85% to 89% mass loss during the resin drying and decomposition step, and calcination of the resultant Nd-loaded resin residue provided an overall material mass loss of ≥ 98%. Recoveries from resin saturated with Nd(III) from 7 M and 0.35 M nitric acid subjected to this process were 30.7 mg and 27.6 mg Nd/g dry resin, respectively, representing an average of 96.1% of Nd retained in the resin bed.
Research Organization:
Savannah River National Laboratory (SRNL), Aiken, SC (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Environmental Management (EM)
Grant/Contract Number:
89303321CEM000080
OSTI ID:
2458195
Report Number(s):
SRNL--STI-2024-00208
Journal Information:
Nuclear Technology, Journal Name: Nuclear Technology Journal Issue: 6 Vol. 211; ISSN 0029-5450
Publisher:
Taylor & FrancisCopyright Statement
Country of Publication:
United States
Language:
English

References (8)

Recovery of Rare-Earth Elements from Neodymium Magnet Waste Using Glycolic, Maleic, and Ascorbic Acids Followed by Solvent Extraction journal December 2018
Cumulative study on solvent extraction of elements by N,N,N′,N′-tetraoctyl-3-oxapentanediamide (TODGA) from nitric acid into n-dodecane journal December 2004
Scaling Trivalent Actinide and Lanthanide Recovery by Diglycolamide Resin from Savannah River Site’s Mark-18A Targets journal December 2020
Recovery and Purification of Plutonium by Anion Exchange journal January 1959
Anthropogenic plutonium-244 in the environment: Insights into plutonium’s longest-lived isotope journal February 2016
Applications of Diglycolamide Based Solvent Extraction Processes in Spent Nuclear Fuel Reprocessing, Part 1: TODGA journal April 2018
Novel Extraction of Chromatographic Resins Based on Tetraalkyldiglycolamides: Characterization and Potential Applications journal May 2005
Production of Cf-252 and other transplutonium isotopes at Oak Ridge National Laboratory journal September 2020

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Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
C
H
O
actinide calcination
and N atoms (CHON)
resin calcination