|About this Abstract
||Part C-3: Processing of Critical Metals
||Separation and Purification of Rare-Earth Elements Based on Electrophoretic Migration (Part II)
|On-Site Speaker (Planned)
Rare earth elements (REEs) are critical materials in many leading-edge technology products. However, environmentally friendly REEs separation outside China has been remained a challenge.
We have been working on a technique which uses emphasised variation of REEs electrophoretic mobility (Ui) in an electrical field for REE separation.
In continuation of the results presented in IMPC 2016, this contribution summarizes the progress achieved in 2016 and 2017. The major goal was to increase the REEs concentration by a factor of 1000 and to attenuate the consequent drawbacks, specifically joule heating effect.
A protic solvent was selected to replace water which has major impact on the complexation and buffer nature of the solution. Non-aqueous medium brings about 1000-fold drop in electrolytes’ molar conductivity while Ui reduces by a factor 10. More over, a quasi-steady state electrophoretic separation method accompanied by a controlled counter-flow is adapted to improve separation efficiency per unit length.
||Planned: At-meeting proceedings