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| Recovery of Platinum and Palladium from Waste Solution Containing Trace Precious Metals by Solvent Extraction |
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Received:October 08, 2022
Revised:October 16, 2022
Accepted:October 18, 2022
Published Online:January 09, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.02.013 |
| KeyWord:waste water; precious metals; extraction; pollution; environmental protection |
| Author | Institution |
| BAI Xiang-lin |
贵研资源易门有限公司 |
| YANG Quan |
Sino-Platinum Metals Resources Yimen Co. Ltd |
| WU Xi-long |
贵研资源易门有限公司 |
| ZHAO Yu |
贵研资源易门有限公司 |
| HAN Ji-biao |
贵研资源易门有限公司 |
| LI Yong |
贵研资源易门有限公司 |
| HE Qi-tao |
昆明贵金属研究所 |
| CHEN Yi-hui |
贵研资源易门有限公司 |
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| Abstract: |
| Solvent extraction technology was used to recover platinum and palladium from the waste solution containing trace precious metals. The experimental results show that palladium can be selectively extracted from the waste solution with extraction rate of 99.9% above under the conditions including 3% LiX84-I + 97% Solvesso150 in organic phase, 0.1 mol/L HCl, and phase ratio of 1︰3. The extraction rate of platinum is 99.95% above from palladium raffinate by 8% TOA + 92% sulfonation in organic phase and phase ratio of 1︰5, which realized the effective recovery of precious metals. Compared with precipitation method and replacement method, solvent extraction method has the advantages of simpler operation, higher metal recovery rate, and can realize the recovery and separation of precious metals in one step. The treated wastewater can be directly incorporated into the conventional sewage treatment process to meet the requirements of environmental protection |
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