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

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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