Study on preparation of VOSO<sub>4</sub> by chemical synthesis of sodium metavanadate

Xiafuhati Airikenjiang; Wen Jing; Yu Tangxia; Jiang Tao

doi:10.7513/j.issn.1004-7638.2024.04.003

Volume 45 Issue 4

Aug. 2024

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2024 > 45(4): 16-22

Xiafuhati Airikenjiang, Wen Jing, Yu Tangxia, Jiang Tao. Study on preparation of VOSO4 by chemical synthesis of sodium metavanadate[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(4): 16-22. doi: 10.7513/j.issn.1004-7638.2024.04.003

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Xiafuhati Airikenjiang, Wen Jing, Yu Tangxia, Jiang Tao. Study on preparation of VOSO₄ by chemical synthesis of sodium metavanadate[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(4): 16-22. doi: 10.7513/j.issn.1004-7638.2024.04.003

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Study on preparation of VOSO₄ by chemical synthesis of sodium metavanadate

doi: 10.7513/j.issn.1004-7638.2024.04.003

School of Metallurgy, Northeastern University, Key Laboratory of Ecological Metallurgy of Polymetallic SymbioticOres Ministry of Education, Shenyang 110819, Liaoning, China

Received Date: 2024-02-09
Publish Date: 2024-08-30

Abstract

Abstract

Vanadium sulfate (VOSO₄) electrolyte is the active material and energy carrier of electrochemical reaction in vanadium battery, and its quality directly affects the performance of vanadium battery such as energy efficiency, energy density and service life. In this paper, VOSO₄ was synthesized from sodium metavanadate (NaVO₃) and sodium sulfite (Na₂SO₃) by reduction, precipitation, acid dissolution and crystallization. The effects of various factors on vanadium recovery were investigated, and the intermediate products VO(OH)₂ and VOSO₄ were characterized. The results show that vanadium (V) can be reduced to vanadium (IV) by adding sodium sulfite into the leaching solution of sodium metavanadate with a mass ratio of m(V):m(S) of 1:0.5 and keeping it at 70 ℃ for 60 min in a solution with pH 2.5. When pH value was adjusted to 7.0 and the reaction temperature was 20 ℃ for 10 min, the blue solution could be converted into VO(OH)₂ intermediate product, achieving a highest vanadium recovery of 98.51%. The diameter of VO(OH)₂ spherical structure was 50~200 nm. Blue VOSO₄ solution can be obtained by dissolving VO(OH)₂ with sulfuric acid. After drying and crystallizing, VOSO₄ crystal with an average diameter of 5 μm was obtained, and the quality of the product met the second grade standard of national standard. This study provides a preliminary experimental basis for in-situ preparation of VOSO₄ from sodium leaching solution of vanadium slag.
- VOSO₄,
- sodium metavanadate,
- vanadium battery electrolyte,
- VO(OH)₂,
- vanadium recovery rate

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References

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