Magnetic Field Directed Rare‐Earth Separations
Abstract
Abstract The separation of rare‐earth ions from one another is challenging due to their chemical and physical similarities. Nearly all rare‐earth separations rely upon small changes in ionic radii to direct speciation or reactivity. Herein, we show that the intrinsic magnetic properties of the rare‐earth ions impact the separations of light/heavy and selected heavy/heavy binary mixtures. Using TriNOx 3− ([{(2‐ t BuNO)C 6 H 4 CH 2 } 3 N] 3− ) rare‐earth complexes, we efficiently and selectively crystallized heavy rare earths (Tb–Yb) from a mixture with light rare earths (La and Nd) in the presence of an external Fe 14 Nd 2 B magnet, concomitant with the introduction of a concentration gradient (decrease in temperature). The optimal separation was observed for an equimolar mixture of La:Dy, which gave an enrichment factor of EF La:Dy =297±31 for the solid fraction, compared to EF La:Dy =159±22 in the absence of the field, and achieving a 99.7 % pure Dy sample in one step. These results indicate that the application of a magnetic field can improve performance in a molecular separation system for paramagnetic rare‐earth cations.
- Authors:
-
[1];
[2];
[1]
- P. Roy and Diana T. Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA
- P. Roy and Diana T. Vagelos Laboratories Department of Chemistry University of Pennsylvania 231 S. 34th St. Philadelphia PA 19104 USA, Eramet Ideas 1 rue Albert Einstein 78190 Trappes France
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1579370
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Angewandte Chemie (International Edition)
- Additional Journal Information:
- Journal Name: Angewandte Chemie (International Edition) Journal Volume: 59 Journal Issue: 5; Journal ID: ISSN 1433-7851
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Higgins, Robert F., Cheisson, Thibault, Cole, Bren E., Manor, Brian C., Carroll, Patrick J., and Schelter, Eric J. Magnetic Field Directed Rare‐Earth Separations. Germany: N. p., 2019.
Web. doi:10.1002/anie.201911606.
Higgins, Robert F., Cheisson, Thibault, Cole, Bren E., Manor, Brian C., Carroll, Patrick J., & Schelter, Eric J. Magnetic Field Directed Rare‐Earth Separations. Germany. https://doi.org/10.1002/anie.201911606
Higgins, Robert F., Cheisson, Thibault, Cole, Bren E., Manor, Brian C., Carroll, Patrick J., and Schelter, Eric J. Thu .
"Magnetic Field Directed Rare‐Earth Separations". Germany. https://doi.org/10.1002/anie.201911606.
@article{osti_1579370,
title = {Magnetic Field Directed Rare‐Earth Separations},
author = {Higgins, Robert F. and Cheisson, Thibault and Cole, Bren E. and Manor, Brian C. and Carroll, Patrick J. and Schelter, Eric J.},
abstractNote = {Abstract The separation of rare‐earth ions from one another is challenging due to their chemical and physical similarities. Nearly all rare‐earth separations rely upon small changes in ionic radii to direct speciation or reactivity. Herein, we show that the intrinsic magnetic properties of the rare‐earth ions impact the separations of light/heavy and selected heavy/heavy binary mixtures. Using TriNOx 3− ([{(2‐ t BuNO)C 6 H 4 CH 2 } 3 N] 3− ) rare‐earth complexes, we efficiently and selectively crystallized heavy rare earths (Tb–Yb) from a mixture with light rare earths (La and Nd) in the presence of an external Fe 14 Nd 2 B magnet, concomitant with the introduction of a concentration gradient (decrease in temperature). The optimal separation was observed for an equimolar mixture of La:Dy, which gave an enrichment factor of EF La:Dy =297±31 for the solid fraction, compared to EF La:Dy =159±22 in the absence of the field, and achieving a 99.7 % pure Dy sample in one step. These results indicate that the application of a magnetic field can improve performance in a molecular separation system for paramagnetic rare‐earth cations.},
doi = {10.1002/anie.201911606},
journal = {Angewandte Chemie (International Edition)},
number = 5,
volume = 59,
place = {Germany},
year = {Thu Dec 12 00:00:00 EST 2019},
month = {Thu Dec 12 00:00:00 EST 2019}
}
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