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Vol. 38 No. 8 (2026): Vol 38, Issue 8 (2026)

Copyright (c) 2026 Jivan Kondre, Dinesh Pund

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Solvent Extraction of Niobium from Oxalic Acid-Sulphuric Acid Medium Using Furfuryl Thioalcohol: Thermodynamic and Mechanistic Investigations

https://doi.org/10.14233/ajchem.2026.36779
Jivan Kondre
Department of Chemistry, Yogeshwari Mahavidyalaya Ambajogai-431517, India
https://orcid.org/0009-0004-4113-1493
Dinesh Pund
Department of Chemistry, Shri R.R. Lahoti Science College, Morshi-444905, India
https://orcid.org/0009-0004-9075-4865

Corresponding Author(s) : Jivan Kondre

jkondre@gmail.com

Asian Journal of Chemistry, Vol. 38 No. 8 (2026): Vol 38, Issue 8 (2026)

Abstract

Solvent extraction equilibria of niobium(V) from aqueous acetic-sulphuric acid solutions with furfuryl thioalcohol (FTA) dissolved in kerosene and the stripping were investigated. Results showed that proposed media can significantly improve the extraction efficiency of niobium. The distribution coefficients were significantly depends upon the media concentrations of oxalic-sulphuric acid and FTA in organic phase. Extraction efficiency (95.80%) was found from aqueous phase of 1.6 mol L–1 C2H2O4-0.6 mol L–1 H2SO4 media with 10% (v/v) FTA dissolved in kerosene. In addition to this, extraction mechanism of niobium was proposed. On the basis of thermodynamics analysis and values of ΔH and ΔS, extraction reaction of niobium was exothermic. Dielectric constants of different diluents used for the preparation of organic phase and its significant role on extraction efficiency of niobium have been studied. In the stripping process, the ability to strip the niobium from organic phase is H2SO4 > HNO3 > HCl solutions.

Keywords

Solvent extraction Niobium Furfuryl thioalcohol Stripping Exothermic
(1)
Kondre, J.; Pund, D. Solvent Extraction of Niobium from Oxalic Acid-Sulphuric Acid Medium Using Furfuryl Thioalcohol: Thermodynamic and Mechanistic Investigations. ajc 2026, 38, 2225-2232.
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