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| Rhodium Recovery from Pt-Rh Alloy Insoluble Residue in Aqua Regia |
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Received:April 25, 2013
Revised:April 28, 2013
Accepted:May 02, 2013
Published Online:October 25, 2013
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| DOI：10.3969/j.issn.1007-7545.2013.11.013 |
| KeyWord:Pt-Rh alloy, insoluble residue in aqua regia; rhodium; recycle; process |
| Author | Institution |
| Li Zhi |
中海油太原贵金属有限公司 |
| Liu Xiaohong |
中海油太原贵金属有限公司 |
| Liu Xin |
中海油太原贵金属有限公司 |
| Yuan Quanmei |
中海油太原贵金属有限公司 |
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| Abstract: |
| Rhodium powder with purity of above 99.95% and noble metal recovery rate of above 95% was recovered from Pt-Rh alloy insoluble residues in aqua regia by the following processes including barium peroxide fusion, hydrochloric acid dissolving, platinum and rhodium precipitation with ammonium chloride, sodium nitrite complexation, rhodium precipitation with ammonium chloride, hydrochloric acid dissolving, base metals removal with ion exchange, hydrazine hydrate reduction, and hydrogen reduction. The reaction principle and technical parameters of recovery processes are investigated. |
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