Kumari, Aarti and Sahu, K K and Sahu, S K (2019) Solvent Extraction and Separation of Nd, Pr and Dy from Leach Liquor of Waste NdFeB Magnet Using the Nitrate Form of Mextral (R) 336At in the Presence of Aquo-Complexing Agent EDTA. Metals, 9(2) . pp. 1-16.
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Abstract
Solvent extraction and separation of Pr, Nd and Dy from a synthetic leach solution of spent NdFeB magnet from wind turbines in the presence of aquo-complexing agent Ethylenediaminetetraacetic acid (EDTA) was studied using the nitrate form of Mextral (R) 336At([336At][NO3]) as an extractant. The effect of different process parameters such as pH, extractant, nitrate, and EDTA concentrations on the extraction of Pr, Nd and Dy was studied. The extraction of these rare earths elements follows the order Pr > Nd > Dy, whereas EDTA forms stable complexes in the order Dy > Nd > Pr. The synergy of these two effects improved the selectivity among these elements as compared to when no aquo-complexing agent was used. The mechanism of extraction of rare earth elements was established by slope analysis method. The Fourier-Transform Infrared Spectroscopy (FTIR) spectra of [336At][NO3] and extracted Nd complex were recorded to understand the interaction of extractant with rare earth metal ions in the organic phase.
| Item Type: | Article |
|---|---|
| Official URL/DOI: | https://doi.org/10.3390/met9020269 |
| Uncontrolled Keywords: | Spent NdFeB magnet; Solvent extraction; Extractant; EDTA; Separation factor;Rare-Earth-Elements; Ionic Liquid; Phosphoric-Acid; Neodymium Ions; Cyanex 272; Recovery; Dysprosium; Metals; Scrap; Praseodymium |
| Divisions: | Metal Extraction and Forming |
| ID Code: | 7928 |
| Deposited By: | Sahu A K |
| Deposited On: | 26 Sep 2019 07:53 |
| Last Modified: | 26 Sep 2019 07:53 |
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