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| Research on Selective Extraction of Vanadium and Tungsten from Waste Denitration Catalyst |
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Received:December 03, 2021
Revised:December 03, 2021
Accepted:December 13, 2021
Published Online:April 12, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.05.009 |
| KeyWord:denitration catalyst；titanium; vanadium; tungsten; comprehensive recovery; selective leaching |
| Author | Institution |
| JIANG Wei |
矿冶科技集团有限公司 |
| WANG Sheng-dong |
矿冶科技集团有限公司 |
| JIANG Xun-xiong |
矿冶科技集团有限公司 |
| ZHANG Deng-gao |
矿冶科技集团有限公司 |
| FENG Lin-yong |
矿冶科技集团有限公司 |
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| Abstract: |
| Waste denitration catalyst is rich in valuable metals such as titanium and tungsten, but it also contains toxic harmful substances such as arsenic, mercury and lead. At present, the waste denitration catalyst has not been used in industry, which not only wastes resources, but also causes great pressure on environment. Comprehensive recovery research on waste denitration catalyst was carried out, and the process route of low temperature activation, selective leaching, and resin exchange was put forward. Through experimental research, leaching rate of vanadium and tungsten is 96.29% and 88.10% respectively. Titanium is basically restrained in the residue. The leaching residue can be directly used as catalyst matrix raw material or high-quality titanium dioxide prepared by sulfuric acid method (or chlorination method). Titanium dioxide with TiO2 content of 99% can be obtained through acid hydrolysis, water leaching, and hydrolysis. |
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