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Extraction of vanadium(V) from sulfate solutions by ACORGA M5640

✍ Scribed by Francisco José Alguacil; José Francisco Muñoz; Manuel Alonso; Aurora Gomez Coedo; Maria Teresa Dorado; Isabel Padilla

Publisher
Wiley (John Wiley & Sons)
Year
2003
Tongue
English
Weight
103 KB
Volume
78
Category
Article
ISSN
0268-2575

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✦ Synopsis

Abstract

ACORGA M5640 (hydroxy‐oxime derivative) has been applied as an extraction reagent for vanadium(V) from sulfate media. The extraction system was studied as a function of contact time, temperature, aqueous pH, diluent of the organic phase, and metal and extractant concentrations. The extraction reaction is endothermic and it is dependent on the organic diluent, aqueous pH and extractant concentration. The data have been analysed numerically to determine the stoichiometry of extracted species and their equilibrium constants. It was found that vanadium was extracted into the organic phase by a complex mechanism which involves the formation of two species (VO~2~R and VO~2~R. HR, where R represents the extractant). Vanadium stripping by acidic and ammonium hydroxide solutions was also studied. Copyright © 2003 Society of Chemical Industry

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