| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Process Metallurgy and Environmental Engineering: An EPD Symposium in Honor of Takashi Nakamura
|
| Presentation Title |
Mutual Separation of Rare Earth Elements by Hydrometallurgical Methods |
| Author(s) |
Hirokazu Narita, Takeshi Ogata, Mikiya Tanaka |
| On-Site Speaker (Planned) |
Hirokazu Narita |
| Abstract Scope |
Rare earth magnets are essential materials for a carbon neutral society; therefore, the improvement of rare earth refining technology has become an urgent issue. However, it is one of the most difficult operations to mutually separate REEs due to their similar chemical properties. We have studied mutual separation of REEs by solvent extraction and ion-exchange methods. As for solvent extraction, we investigated the extraction behavior of REEs from aqueous solutions with relatively high acid concentration using amide-type extractants. Also, for acidic organophosphonic acid extractant (PC-88A), the extraction equilibrium constants for REEs were evaluated by considering nonideality of the extractant. As for ion-exchange, we have developed diglycolamic acid-type adsorbents, which can selectively recover heavy REEs over light REEs and base metals. Currently, we are studying a new system that can effectively separate adjacent REEs such as Pr/Nd. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Hydrometallurgy, Extraction and Processing, |