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

Case, Mary E.; Fox, Robert V.; Baek, Donna L.; Mincher, Bruce J.; Wai, C. M.

doi:10.1080/07366299.2017.1373984

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

Journal Article · Thu Sep 21 00:00:00 EDT 2017 · Solvent Extraction and Ion Exchange

DOI:https://doi.org/10.1080/07366299.2017.1373984· OSTI ID:1465811

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Idaho National Lab. (INL), Idaho Falls, ID (United States); Univ. of Idaho, Moscow, ID (United States)
Idaho National Lab. (INL), Idaho Falls, ID (United States)
Univ. of Idaho, Moscow, ID (United States)

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.

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Research Organization:: Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC07-05ID14517

OSTI ID:: 1465811

Report Number(s):: INL/JOU-17-40970-Rev000; TRN: US1902561

Journal Information:: Solvent Extraction and Ion Exchange, Vol. 35, Issue 7; ISSN 0736-6299

Publisher:: Taylor and FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 14 works

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Extraction of Rare Earth Elements from Chloride Media with Tetrabutyl Diglycolamide in 1-Octanol Modified Carbon Dioxide Case, Mary; Fox, Robert; Baek, Donna Metals, Vol. 9, Issue 4 https://doi.org/10.3390/met9040429	journal	April 2019
Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides Wilden, Andreas; Mincher, Bruce J.; Mezyk, Stephen P. Taylor & Francis https://doi.org/10.6084/m9.figshare.6851141	text	January 2018
Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides Wilden, Andreas; Mincher, Bruce J.; Mezyk, Stephen P. Taylor & Francis https://doi.org/10.6084/m9.figshare.6851141.v2	text	January 2018
Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides Wilden, Andreas; Mincher, Bruce J.; Mezyk, Stephen P. Taylor & Francis https://doi.org/10.6084/m9.figshare.6851141.v1	text	January 2018

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

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Cited By (5)

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