skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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.

Authors:
 [1];  [2];  [3]; ORCiD logo [4];  [5]; ORCiD logo [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)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1468253
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Solvent Extraction and Ion Exchange
Additional Journal Information:
Journal Volume: 36; Journal Issue: 1; Journal ID: ISSN 0736-6299
Publisher:
Taylor and Francis
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Purification; HEH[EHP]; PC88A; ALSEP; phosphonic acid

Citation Formats

Holfeltz, Vanessa E., Campbell, Emily L., Peterman, Dean R., Standaert, Robert F., Paulenova, Alena, Lumetta, Gregg J., and Levitskaia, Tatiana G. Effect of HEH[EHP] impurities on the ALSEP solvent extraction process. United States: N. p., 2017. Web. doi:10.1080/07366299.2017.1412111.
Holfeltz, Vanessa E., Campbell, Emily L., Peterman, Dean R., Standaert, Robert F., Paulenova, Alena, Lumetta, Gregg J., & Levitskaia, Tatiana G. Effect of HEH[EHP] impurities on the ALSEP solvent extraction process. United States. doi:10.1080/07366299.2017.1412111.
Holfeltz, Vanessa E., Campbell, Emily L., Peterman, Dean R., Standaert, Robert F., Paulenova, Alena, Lumetta, Gregg J., and Levitskaia, Tatiana G. Wed . "Effect of HEH[EHP] impurities on the ALSEP solvent extraction process". United States. doi:10.1080/07366299.2017.1412111. https://www.osti.gov/servlets/purl/1468253.
@article{osti_1468253,
title = {Effect of HEH[EHP] impurities on the ALSEP solvent extraction process},
author = {Holfeltz, Vanessa E. and Campbell, Emily L. and Peterman, Dean R. and Standaert, Robert F. and Paulenova, Alena and Lumetta, Gregg J. and Levitskaia, Tatiana G.},
abstractNote = {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.},
doi = {10.1080/07366299.2017.1412111},
journal = {Solvent Extraction and Ion Exchange},
number = 1,
volume = 36,
place = {United States},
year = {Wed Dec 20 00:00:00 EST 2017},
month = {Wed Dec 20 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share: