About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Recycling and Environmental Technologies
|
| Presentation Title |
Optimization studies of chemical precipitation of Vanadium from Spent Catalysts leach liquor |
| Author(s) |
Nityanand Singh, Tae-Hyuk Lee, Hee-Nam Kang, Jin-Young Lee |
| On-Site Speaker (Planned) |
Nityanand Singh |
| Abstract Scope |
Spent sulfuric acid manufacturing (SAM) catalysts, which are rich in heavy metals, present both environmental risks and potential resources. Ensuring safe disposal and efficient metal recovery is essential for sustainability and waste valorization. This study focuses on developing and optimizing a hydrometallurgical process to recover vanadium (V(V)) from spent SAM catalysts using alkali leaching and precipitation techniques. The leach liquor was produced by leaching the spent catalyst powder with 1 M NaOH at room temperature, maintaining a S/L of 250 g/L for 300 min. The resulting solution, rich in V(V) and Al(III), was then treated with NH4Cl at a pH of 7.8, leading to the precipitation of vanadium salt (NH4VO3). This salt was subsequently calcined at 410°C for 120 min to convert it into high-purity V2O5. This green and sustainable approach transforms industrial vanadium waste into valuable V2O5 materials, contributing to the advancement of the circular economy. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Recycling and Secondary Recovery, Hydrometallurgy, Aluminum |