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Title: Extraction behavior of selected rare earth metals from acidic chloride media using tetrabutyl diglycolamide

Abstract

Rare earth elements (REEs) are vital to modern, high-tech devices. Recycling REEs from post-consumer electronics can potentially diminish supply chain risks. Toward that end, liquid–liquid solvent extraction of various REEs was investigated with tetrabutyl diglycolamide (TBDGA) in 1-octanol from hydrochloric acid media. Metal partitioning to the organic phase was shown to increase as [Cl–] increased. In contrast, increasing [H+] did not improve extraction. The use of the polar diluent 1-octanol provided high extraction efficiency, especially for the partition of heavy lanthanides from solutions of high chloride concentration. Although the polar diluent also extracted molar amounts of water and acid, it was concluded that a neutral metal/TBDGA complex as mainly the disolvate was extracted, and that complexation was observed to be exothermic. Finally, these results indicate that REE extraction from aqueous chloride solutions can be efficient without the use of high acid concentrations.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [3]
+ Show Author Affiliations
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States); Univ. of Idaho, Moscow, ID (United States)
  2. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  3. Univ. of Idaho, Moscow, ID (United States)
Publication Date:
Research Org.:
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1465811
Report Number(s):
INL/JOU-17-40970-Rev000
Journal ID: ISSN 0736-6299; TRN: US1902561
Grant/Contract Number:  
AC07-05ID14517
Resource Type:
Accepted Manuscript
Journal Name:
Solvent Extraction and Ion Exchange
Additional Journal Information:
Journal Volume: 35; Journal Issue: 7; Journal ID: ISSN 0736-6299
Publisher:
Taylor and Francis
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Rare Earth Elements; Solvent Extraction; Lanthanides; diglycolamide; extraction; chloride media

Citation Formats

Case, Mary E., Fox, Robert V., Baek, Donna L., Mincher, Bruce J., and Wai, C. M. Extraction behavior of selected rare earth metals from acidic chloride media using tetrabutyl diglycolamide. United States: N. p., 2017. Web. doi:10.1080/07366299.2017.1373984.
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Case, Mary E., Fox, Robert V., Baek, Donna L., Mincher, Bruce J., & Wai, C. M. Extraction behavior of selected rare earth metals from acidic chloride media using tetrabutyl diglycolamide. United States. https://doi.org/10.1080/07366299.2017.1373984
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Case, Mary E., Fox, Robert V., Baek, Donna L., Mincher, Bruce J., and Wai, C. M. Thu . "Extraction behavior of selected rare earth metals from acidic chloride media using tetrabutyl diglycolamide". United States. https://doi.org/10.1080/07366299.2017.1373984. https://www.osti.gov/servlets/purl/1465811.
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@article{osti_1465811,
title = {Extraction behavior of selected rare earth metals from acidic chloride media using tetrabutyl diglycolamide},
author = {Case, Mary E. and Fox, Robert V. and Baek, Donna L. and Mincher, Bruce J. and Wai, C. M.},
abstractNote = {Rare earth elements (REEs) are vital to modern, high-tech devices. Recycling REEs from post-consumer electronics can potentially diminish supply chain risks. Toward that end, liquid–liquid solvent extraction of various REEs was investigated with tetrabutyl diglycolamide (TBDGA) in 1-octanol from hydrochloric acid media. Metal partitioning to the organic phase was shown to increase as [Cl–] increased. In contrast, increasing [H+] did not improve extraction. The use of the polar diluent 1-octanol provided high extraction efficiency, especially for the partition of heavy lanthanides from solutions of high chloride concentration. Although the polar diluent also extracted molar amounts of water and acid, it was concluded that a neutral metal/TBDGA complex as mainly the disolvate was extracted, and that complexation was observed to be exothermic. Finally, these results indicate that REE extraction from aqueous chloride solutions can be efficient without the use of high acid concentrations.},
doi = {10.1080/07366299.2017.1373984},
journal = {Solvent Extraction and Ion Exchange},
number = 7,
volume = 35,
place = {United States},
year = {2017},
month = {9}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1080/07366299.2017.1373984
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Works referenced in this record:

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text, January 2015

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    Works referencing / citing this record:

    Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides
    journal, June 2018

    Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides
    text, January 2018

    Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides
    text, January 2018

    Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides
    text, January 2018

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