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| Research on Sulfate Dissolution Mechanism of Niobium Oxide |
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Received:January 26, 2018
Revised:February 07, 2018
Accepted:February 08, 2018
Published Online:June 15, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2018.07.009 |
| KeyWord:niobium oxide; sulfuric acid; enhanced dissolution; coordination dissolution; mechanism |
| Author | Institution |
| liu song yan |
1.省部共建高品质特殊钢冶金与制备国家重点实验室 |
| He qi |
2.上海市钢铁冶金新技术开发应用重点实验室 |
| Li qiujv |
3.上海大学 材料科学与工程学院 邮编 |
| Sun ying |
3.上海大学 材料科学与工程学院 邮编 |
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| Abstract: |
| Dissolution process of Nb2O5 in sulfuric acid was studied. Dissolution products of niobium oxide were determined based on thermodynamic phase diagram and previous experimental results. Dissolution mechanism of Nb2O5 in sulfuric acid was investigated by measuring conductivity of H2SO4-Nb2O4SO4-H2O system. The results show that dissolved product Nb2O4SO4 exists as a stable complex in solution with stability constant of 572. The coordination theory of coordination dissolution suggests that dissolution of Nb2O5 in acid is promoted. |
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