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| Platinum Refining by Acid Pickling Ammonium Chloroplatinate |
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Received:July 10, 2023
Revised:July 20, 2023
Accepted:July 25, 2023
Published Online:October 09, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.11.007 |
| KeyWord:platinum refining; acid pickling; removing impurities; Sn |
| Author | Institution |
| YAND Ding |
贵研资源（易门）有限公司 |
| MING Xiao |
贵研资源（易门）有限公司 |
| WANG Huan |
贵研资源（易门）有限公司 |
| WU Xilong |
贵研资源（易门）有限公司 |
| YANG Quan |
贵研资源（易门）有限公司 |
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| Abstract: |
| The method of refining platinum by acid pickling ammonium chloroplatinate to remove impurities was proposed for the first time. The effects of acid pickling reagents, acid concentration, solid-liquid ratio of system, and temperature on impurities removal efficiency by acid pickling were studied. More than 90% of Na, Al, Fe, and Si are removed under the optimum conditions, while the loss rate of Pt is less than 0.3%. The content of impurities except Sn in the sponge platinum prepared by pickling ammonium chloroplatinate reaches the SM-Pt 99.95 standard. The behavior of Sn in the acid pickling process was studied. The results show that either acid pickling or calcination of ammonium chloroplatinate could remove Sn in the form of (NH4)2SnCl6 to achieve the same effect of Sn removal, but could not remove Sn in the form of SnO2. |
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