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Effect of HEH[EHP] impurities on the ALSEP solvent extraction process

Journal Article · · Solvent Extraction and Ion Exchange
 [1];  [2];  [3];  [4];  [5];  [2];  [2]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Oregon State Univ., Corvallis, OR (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  5. Oregon State Univ., Corvallis, OR (United States)
+ Show Author Affiliations
In solvent extraction processes, organic phase impurities can negatively impact separation factors, hydrolytic performance, and overall system robustness. The resulting inconsistent performance can affect the process-level viability of a separation concept, and thus knowledge of the impurities present, their effects on the process, and how to remove them are vital. Deleterious impurities may be introduced into a system from reagent synthesis, or result from degradation via radiolysis and hydrolysis during use. In this work, the acidic extractant, 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (HEH[EHP])—proposed for application in extractive processes aimed at separating trivalent minor actinides from lanthanides and other fission products—is characterized with respect to its common impurities and their impact on Am(III) stripping in the Actinide Lanthanide SEParation (ALSEP) system. Furthermore, to control impurities in HEH[EHP], existing purification technologies commonly applied for the acidic organophosphorus reagent were assessed and a new chromatographic purification method specific to HEH[EHP] is presented.
Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
Grant/Contract Number:
AC05-00OR22725; AC07-05ID14517
OSTI ID:
1468253
Alternate ID(s):
OSTI ID: 1618048
OSTI ID: 1430434
Report Number(s):
INL/JOU--17-43424-Rev000
Journal Information:
Solvent Extraction and Ion Exchange, Journal Name: Solvent Extraction and Ion Exchange Journal Issue: 1 Vol. 36; ISSN 0736-6299
Publisher:
Taylor and FrancisCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Closing the Nuclear Fuel Cycle with a Simplified Minor Actinide Lanthanide Separation Process (ALSEP) and Additive Manufacturing journal September 2019
Evaluation of the impacts of gamma radiolysis on an ALSEP process solvent journal February 2018
Minimizing the aggregation of diglycolamide reverse micelles in the n -dodecane phase with bis-(2-ethylhexyl)phosphoric acid “reactive” phase modifier journal January 2018

Figures / Tables (13)

Figure 1(p. 31)figure Figure 1
Table 1(p. 32)table Table 1
Figure 2(p. 33)figure Figure 2
Figure 3(p. 34)figure Figure 3
Table 2(p. 35)table Table 2
Table 3(p. 36)table Table 3
Figure 4(p. 37)figure Figure 4
Figure 5(p. 38)figure Figure 5
Table 4(p. 39)table Table 4
Table 5(p. 40)table Table 5
Table 6(p. 41)table Table 6
Table 7(p. 42)table Table 7
Figure 6(p. 43)figure Figure 6

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALSEP
HEH[EHP]
Impurities
PC88A
Purification
phosphonic acid