Interfacial kinetics of iron(III) sulfate-sulfuric acid/.beta.-alkenyl-8-hydroxyquinoline-xylene extraction system

Abstract

The results of a study of the interfacial kinetics for the extraction of iron(III) in sulfuric acid with /3-alkenyl-8hydroxyquinoline are presented. Use of a liquid jet recycle reactor (LJRR) to obtain the interfacial rate data permits appropriate analysis when mass transfer and interfacial reaction contribute to the overall rate. Ionic speciation in the bulk aqueous phase is modeled to obtain the concentrations of Fe3+ and H+. The postulated mechanism giving rise to the rate expression includes the adsorption of HR and the protonation of HR. It also assumes that the rate-determining step is the formation of FeR2+ in the interfacial region. The postulated model is supported by physicochemical evidence, such as interfacial tension data, and statistical evaluation of the model.

Chemically active liquid membranes in inorganic supports for metal ion separations

“…A kinetic model for the interfacial reaction can be derived based on a series of five elementary reactions at the interface in a similar fashion as suggested earlier (Danesi et al, 1980;Teramato and Tanimoto, 1983;and Lee and Tavlarides, 1986).…”