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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Rare Metal Extraction & Processing
Presentation Title Electrochemical and Spectroscopic Study of Eu(III)/Eu(II) Couple in the Ehtylmethylimidazolium Bis(trifluromethanesulfonyl)imide Ionic Liquid
Author(s) David Bengio, Thomas Dumas, Eric Mendes, Pier Lorenzo Solari, Richard Husar, Michel Schlegel, Philippe Moisy, Stéphane Pellet-Rostaing
On-Site Speaker (Planned) David Bengio
Abstract Scope Ionic liquids are room-temperature molten salts which demonstrate unique physico-chemical properties. They stabilize some species and allow the use of electrochemical techniques to apply redox-controlled conditions. In particular, the separation of rare-earths could be achieved by selectively modifying the oxidation state of one element. Thus, we have studied the electrolytic reduction of Eu(III) to Eu(II) by different spectroscopic techniques. First, absorption and fluorescence spectroscopies were used to monitor the electrolysis and improve the setup. Then, X-ray absorption spectroscopy (XANES and EXAFS) was used in order to provide information on the coordination state of Eu(III) and Eu(II). The influence of water concentration on Eu redox properties and speciation has also been studied. This data will be useful to develop electrochemical separation processes for rare-earths or other critical elements. To the best of our knowledge, it is the first in-situ XAS measurements during an electrolysis performed in an ionic liquid.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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D-55: Experimental Modeling of Nodulation in Copper Electrorefining
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D-57: Microfluidic Solvent Extraction of Zinc from Low Concentration Sulfate Solution Using D2EHPA
Effect of CaO Additive on the Interfacial Reaction between the BaZrO3 Refractory and Titanium Enrichment Melt
Electrochemical and Spectroscopic Study of Eu(III)/Eu(II) Couple in the Ehtylmethylimidazolium Bis(trifluromethanesulfonyl)imide Ionic Liquid
Electrochemical Formation of Tb Alloys in Molten LiCl-KCl Eutectic Melts and Separation of Tb
Electrodeposition of γ-MnO2 from Manganese Nodule Leach Liquor: Surface Modification and Electrochemical Applications
Extracting Uranium and Molybdenum from Refractory U-Mo Associated Ore
Extraction of Vanadium and Chromium from the Material Containing Chromium, Titanium and Vanadium
Extraction Separation of V and Fe in High Acid and High Iron Solution
FEM Simulation of Nodulation in Copper Electrorefining
Present Status and Development of Preparation Technologies of Titanium-rich Materials
Purification of a Nigerian Wolframite Ore for Improved Industrial Applications
Recovery of Lithium from Brine with MnO2 Nanowire Ion Sieve Composite
Recovery of Manganese from Scrap Batteries of Mobile Phones
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Review on the Processes for the Recovery of Rare Earth Metals (REMs) from Secondary Resources
Selective Oxidation of Cerium in Rare Earth Solutions, a Comparison of Four Oxidants
Selective Reduction and Separation of Europium from Mixed Rare-earth Oxides Recovered from Waste Fluorescent Lamp Phosphors
Study of the Mechanochemical Calcification for Mixed Rare Earth Concentrate
The Demonstration Pilot Plant Results for the Search Minerals Direction Extraction Process for Rare Earth Recovery
The Electrolytic Production of Rare Earths from their Oxides
The Management of Lead Concentrate Acquisition in “Trepca”
The Recovery of Cesium Salts from the Taron Deposit
Thermodynamic Study of Ga Extraction for Trace Element Analysis by ICP-MS
Thermodynamics Analysis on the Process of Decarburization and Vanadium Protection by CO2

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