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Equilibrium studies of the extraction of zirconium(IV) from sulfuric acid solutions with Di(2‐ethylhexyl)phosphoric acid
Author(s) -
Juang RueyShin,
Lo RuHuey
Publication year - 1993
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280580309
Subject(s) - sulfuric acid , phosphoric acid , zirconium , stoichiometry , equilibrium constant , chemistry , extraction (chemistry) , kerosene , inorganic chemistry , chemical equilibrium , nuclear chemistry , chromatography , organic chemistry
Equilibrium studies were made at 25°C in the extraction of zirconium(IV) from sulfuric acid solutions with di(2‐ethylhexyl)phosphoric acid (D2EHPA, HR) dissolved in kerosene. The reaction stoichiometry was numerically determined and the compositions of the extracted species were found to be ZrR 4 and ZrR 4 (HR) at low loading ratios of D2EHPA (α < 0.09), but became ZrR 4 and ZrR 4 (HR) 3 at relatively higher loading ratios (0.10 < α < 0.32). The equilibrium constants for the formation of these species were also obtained. Furthermore, numerical treatment of the experimental data excluded the existence of polynuclear complexes under the conditions studied (α < 0.32).