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

Journal Article · · Solvent Extraction and Ion Exchange
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [3]
  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)
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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.

Research Organization:
Idaho National Laboratory (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
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

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Cited By (5)

Radiolytic and hydrolytic degradation of the hydrophilic diglycolamides journal June 2018
Extraction of Rare Earth Elements from Chloride Media with Tetrabutyl Diglycolamide in 1-Octanol Modified Carbon Dioxide journal April 2019
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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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Rare Earth Elements
Solvent Extraction
Lanthanides
diglycolamide
extraction
chloride media