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| Recovery of Precious Metals from the Solution after DETA Rhodium Precipitation by Two-step Reduction Method |
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Received:September 18, 2024
Revised:October 17, 2024
Accepted:October 18, 2024
Published Online:February 18, 2025
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| DOI：doi：10.20237/j.issn.1007-7545.2025.02.016 |
| KeyWord:DETA; reduction; replacement; platinum; palladium; rhodium |
| Author | Institution |
| WANG Yaxiong |
云南贵金属实验室有限公司 |
| WU Yuedong |
云南贵金属实验室有限公司 |
| DONG Haigang |
云南省贵金属新材料控股集团股份有限公司 |
| ZHAO Jiachun |
云南贵金属实验室有限公司 |
| FAN Yunpeng |
云南贵金属实验室有限公司 |
| TONG Weifeng |
云南贵金属实验室有限公司 |
| ZHANG Chunxi |
云南贵金属实验室有限公司 |
| YANG Yibin |
云南贵金属实验室有限公司 |
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| Abstract: |
| A two-step reduction and recovery process is proposed to address the difficulty of replacing precious metals in the solution after DETA rhodium precipitation. First, add divalent tin salts to reduce and activate the precious metals in the solution, and then add replacement metals for secondary reduction and replacement. The effects of acidity, temperature, time, activation metal and replacement metal addition on the final recovery rate of precious metal replacement were studied. The results show that under the conditions of pH value ≤2, temperature 80-90℃, activation time 60-120 minutes, SnCl2 ? 2H2O to precious metal mass ratio of 10:1, replacement temperature 80-100℃, and zinc powder to precious metal mass ratio of 20:1, The total displacement recovery rate of platinum, palladium, and rhodium is greater than 99.5%, and the total content of platinum, palladium, and rhodium is greater than 95%. |
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