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Please use this identifier to cite or link to this item: https://elib.belstu.by/handle/123456789/40288
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dc.contributor.authorRomanovskaia, Elena-
dc.contributor.authorRomanovski, Valentin-
dc.contributor.authorKwapinski, Witold-
dc.contributor.authorKurilo, Irina-
dc.date.accessioned2021-04-22T06:10:25Z-
dc.date.available2021-04-22T06:10:25Z-
dc.date.issued2021-
dc.identifier.citationSelective recovery of vanadium pentoxide from spent catalysts of sulfuric acid production: Sustainable approach / Elena Romanovskaia [et al.] // Hydrometallurgy. - 2021. - T. 200. - № 105568ru
dc.identifier.urihttps://elib.belstu.by/handle/123456789/40288-
dc.descriptionSpent vanadium catalysts of sulfuric acid production (main elemental composition in wt%: 7.5 V, 9.1 K, 10.2 S, 23.2 Si and 1.4 Fe) can be used as a secondary source of vanadium. Extraction of vanadium was studied using two-step leaching (acidic and reductive) of spent vanadium catalysts with further oxidizing of leaching solutions. The factors leaching and hydrolysis temperature, concentration of leaching (H[2]SO[4], Na[2]SO[3]) and oxidizing ((NH[4])[2]S[2]O[8]) reagents, solid/liquid ratio, mixing parameters, and time of leaching and thermohydrolysis were systematically investigated. The solubility of V[2]O[5] was investigated as a function of temperature, pH of sulfuric acid solutions, and concentration of Na[2]SO[3]. The kinetics of V[2]O[5] solubility and reduction were also studied. The vanadium leaching yield after a two-step recovery was 98 wt% after acidic (H[2]SO[4], pH 1.2–1.3) leaching with ultrasonic treatment for 5 min at ambient temperature, followed by reductive leaching in 0.01 Mol/L Na[2]SO[3] solution for 15 min at ambient temperature. The highest vanadium extraction yield from leaching solutions was 98 wt% obtained through oxidizing of leaching solutions by 30 wt%. (NH[4])[2]S[2]O[8] with a molar ratio n(V[2]O[5])/n ((NH[4])[2]S[2]O[8]) of 5/1 for a reaction time of 5 min at 80–90 ◦C. the extracted vanadium product was V[2]O[5] with a purity of 85–87 wt%. The technological scheme has been developed to recycle all obtained products and subproducts.ru
dc.format.mimetypeapplication/pdfru
dc.language.isoenru
dc.subjectSpent vanadium catalystsru
dc.subjectExtraction of vanadiumru
dc.subjectleachingru
dc.subjecthydrolysisru
dc.subjectvanadium oxideru
dc.subjectsolubilityru
dc.subjectleaching solutionsru
dc.subjectwaste recyclingru
dc.subjectоксид ванадияru
dc.subjectотработанные ванадиевые катализаторыru
dc.subjectизвлечение ванадияru
dc.subjectвыщелачиваниеru
dc.subjectокислениеru
dc.subjectгидролизru
dc.subjectрастворимостьru
dc.subjectрециклинг отходовru
dc.titleSelective recovery of vanadium pentoxide from spent catalysts of sulfuric acid production: Sustainable approachru
dc.typeArticleru
dc.identifier.udc661.888.1-
dc.identifier.DOIhttps://doi.org/10.1016/j.hydromet.2021.105568-
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