Issue 11, 2016

Diglycolamide-functionalized resorcinarene for rare earths extraction

Abstract

A C-methylcalix(4)methylresorcinarene–DODGA ligand, derived from calix[4]methylresorcinarene functionalized with four diglycolamide (DGA) binding units, was synthesized and characterized by NMR and MS. The ligand was investigated with respect to the extraction of rare earth elements (REEs) from nitric acid solution. High sensitivity was observed, particularly toward heavy rare earth elements. The acidity effects, as well as the concentration of the extractant, were evaluated with regard to the extraction and separation efficiencies. The results showed that the distribution coefficient values increase with an increase in nitric acid concentration in the range from 0.1 to 5 mol L−1. A slope analysis method and spectrophotometric titrations showed clear complexation of the REEs with the ligand. An extraction mechanism is proposed from the estimation of the thermodynamic parameters (ΔH, ΔS, and ΔG). The extraction and stripping of REEs from a simulated leaching solution of a Nd/Fe/B/Dy magnet have been studied.

Graphical abstract: Diglycolamide-functionalized resorcinarene for rare earths extraction

Supplementary files

Article information

Article type
Paper
Submitted
14 Jul 2016
Accepted
12 Sep 2016
First published
13 Sep 2016

New J. Chem., 2016,40, 9344-9351

Diglycolamide-functionalized resorcinarene for rare earths extraction

M. Wehbie, G. Arrachart, I. Karamé, L. Ghannam and S. Pellet-Rostaing, New J. Chem., 2016, 40, 9344 DOI: 10.1039/C6NJ02195F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements