Influence of hydrogen peroxide on acid leaching of vanadium from spent catalysts

Authors

  • Анна Юріївна Нікіфорова Ukrainian State University of Chemical Technology Gagarina avenue 8, Dnepropetrovsk, Ukraine, 49005, Ukraine https://orcid.org/0000-0003-0301-8890
  • Олег Вікторович Кожура Ukrainian State University of Chemical Technology Gagarina avenue 8, Dnepropetrovsk, Ukraine, 49005, Ukraine https://orcid.org/0000-0002-6426-8941
  • Олександр Олександрович Пасенко Ukrainian State University of Chemical Technology Gagarina avenue 8, Dnepropetrovsk, Ukraine, 49005, Ukraine https://orcid.org/0000-0003-3486-1864

DOI:

https://doi.org/10.15587/1729-4061.2015.36014

Keywords:

catalyst, vanadium, leaching, hydrogen peroxide, thermohydrolysis

Abstract

Vanadium leaching from spent catalysts of sulfur dioxide conversion in sulfuric acid solutions with the addition of an auxiliary agent - hydrogen peroxide was investigated. It is shown that the formation of peroxide derivatives of vanadium improves the leaching degree by 30-40% for low-temperature catalysts, containing rubidium and cesium sulfates as promoters. Acid concentration has a weak influence on the leaching degree and may be limited to 5-10 g/l. Low acidity of leaching solutions allows to carry out the thermohydrolytic deposition of pentavalent vanadium without prior neutralization and introduction of extraneous cations with alkali. Solutions, after vanadium deposition, can be returned to the leaching stage, which contributes to their concentrating on valuable rare-metal salt components and reduces the cost of evaporation. 90-95% vanadium extraction in leaching solution was reached, through vanadium extraction is 86-90%. 

Author Biographies

Анна Юріївна Нікіфорова, Ukrainian State University of Chemical Technology Gagarina avenue 8, Dnepropetrovsk, Ukraine, 49005

Graduate student

Department of Inorganic Substances Technology and Ecology

Олег Вікторович Кожура, Ukrainian State University of Chemical Technology Gagarina avenue 8, Dnepropetrovsk, Ukraine, 49005

Candidate of chemical sciences, Associate professor

Department of Inorganic Substances Technology and Ecology

Олександр Олександрович Пасенко, Ukrainian State University of Chemical Technology Gagarina avenue 8, Dnepropetrovsk, Ukraine, 49005

Candidate of technical sciences, Associate professor

Department of Inorganic Substances Technology and Ecology

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Published

2015-02-24

How to Cite

Нікіфорова, А. Ю., Кожура, О. В., & Пасенко, О. О. (2015). Influence of hydrogen peroxide on acid leaching of vanadium from spent catalysts. Eastern-European Journal of Enterprise Technologies, 1(6 (73), 16–21. https://doi.org/10.15587/1729-4061.2015.36014