Abstract
With increasing demand and prospective scarcity of rare earths, the capacity to separate these elements with high selectivity is a critical challenge in hydrometallurgy. We evaluate in this article the capacity of N,N,N’,N’-tetra-n-octyl diglycolamide (TODGA) to separate lanthanides in both organic solvent and ionic liquids (ILs) using the holdback reagent diethylenetriaminepentaacetic acid (DTPA) in the aqueous phase. Totally, 10 imidazolium-based ILs with various hydrophobicity were studied herein: [C n mim][NTf 2 ] and [C n mim][BETI] (n = 2,4,6,8,10). In this process, selectivity for light lanthanides was obtained owing to a competitive complexation between TODGA and DTPA.
Original language | English |
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Pages (from-to) | 574-582 |
Number of pages | 9 |
Journal | Solvent Extraction and Ion Exchange |
Volume | 36 |
Issue number | 6 |
DOIs | |
State | Published - Sep 19 2018 |
Funding
This work was supported by the US Department of Energy, Office of Science, Division of Chemical Sciences, Geosciences, and Biosciences. This work was supported by the US Department of Energy, Office of Science, Division of Chemical Sciences, Geosciences, and Biosciences.
Keywords
- TODGA
- cation exchange
- ionic liquids
- lanthanides