| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Rare Metal Extraction & Processing
|
| Presentation Title |
High-performance Solid Phase Extraction Chromatography as Part of a Process for Recycling NdFeB Magnet Waste |
| Author(s) |
Tiaan Punt, Kerstin Forsberg, Michael Svärd |
| On-Site Speaker (Planned) |
Tiaan Punt |
| Abstract Scope |
The increasing demand for rare-earth elements (REEs) in renewable energy technologies and advanced materials has driven a rapid rise in both their economic importance and supply risk. Complementing the supply of REEs through recycling of waste streams has therefore become increasingly significant. This study investigated the recycling of NdFeB magnets by separating the REEs (Pr, Nd, Sm, Dy) from impurities (Fe, Co, B) using solvent extraction. The subsequent purification of REEs into individual fractions was investigated using high-performance solid phase extraction chromatography. The solvent extraction separated more than 99.5% REEs in 3 counter-current stages with D2EHPA. The REEs were stripped using a 1.25M H2SO4 solution and separated into Nd and Pr, Sm, and Dy fractions from the loaded stripping solution in a single stage using a D2EHPA-impregnated column and elution with H2SO4-gradients. The work demonstrates the performance of chromatographic separation as a final purification step in a hydrometallurgical recycling process. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Hydrometallurgy, Extraction and Processing, Recycling and Secondary Recovery |