| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Rare Metal Extraction & Processing
|
| Presentation Title |
Leaching Behavior of Hydrogen Peroxide in the Process of Recovering Silver from Spent Silver Catalysts |
| Author(s) |
Quan Yang, Jibiao Han, Wangrui Ma, Ruiling Yuan, Yong Li, Yu Zhao, Zixuan Li |
| On-Site Speaker (Planned) |
Jibiao Han |
| Abstract Scope |
The leaching behavior of H2O2 in the process of recovering silver from spent catalysts based on the traditional recovery method from HNO3 is studied.The leaching rate of silver reachs 99.63% at 2mol/L HNO3, 2.5mol/L H2O2, leaching temperature 70 °C, leaching time 120 minutes, and solid-liquid ratio 1:4, it has a high recycling effect. During the leaching process, the presence of H2O2 can convert Ag into Ag2O, which can effectively improve the leaching rate. In addition, the NOx generated during the reaction between HNO3 and Ag can be oxidized by H2O2 to form HNO3 and continue to participate in the reaction. This promotes the efficient leaching of Ag while reducing the pollution caused by NOx emissions. The method of using H2O2 and HNO3 as the leaching system provides a theoretical basis and technical support for the green and efficient recovery of Ag from spent silver catalysts. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Sustainability, Extraction and Processing, Hydrometallurgy |