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Ionic liquid-based extraction system using diglycolamide functionalized macrocyclic platforms for the extraction and recovery of lanthanides

Abstract

Solvent extraction of lanthanides Ln(III) (La, Eu and Yb) with resorcin[4]arene cavitand-triazole-DODGA (CR4-TZ-DODGA) and t-butylcalix[4]arene-triazole-DODGA (C4-TZ-DODGA) has been studied in a room temperature ionic liquid (RTIL), N-octyl-N-ethylpiperidinium bis(trifluoromethylsulfonyl)imide ([EOPip]NTf2). The two macrocyclic platforms were functionalized with four diglycolamide (DGA) thanks to a click reaction and fully characterized by NMR and MS analysis. Acidity effect as well as the concentration of the ligands were investigated on the extraction and separation properties. The parameters of the extraction processes were determined by the slope method and thermodynamic studies. For both ligands, the extraction efficiency change along the lanthanoid series with a selectivity toward Yb(III) in regards to La(III), Eu(III). The selective extraction and recovery of lanthanides from a simulated leaching solution of Nd/Fe/B/Dy magnet has also been investigated.

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Publication details

The article was received on 31 Jul 2017, accepted on 19 Oct 2017 and first published on 19 Oct 2017


Article type: Paper
DOI: 10.1039/C7DT02797D
Citation: Dalton Trans., 2017, Accepted Manuscript
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    Ionic liquid-based extraction system using diglycolamide functionalized macrocyclic platforms for the extraction and recovery of lanthanides

    M. WEHBIE, G. ARRACHART, I. Karamé, L. Ghannam and S. PELLET-ROSTAING, Dalton Trans., 2017, Accepted Manuscript , DOI: 10.1039/C7DT02797D

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