Extraction of zinc chloride from aqueous chloride solutions by hydrocarbon solutions of quaternary ammonium chloride salt Attempt to evaluate the zinc chloride complexes by means of the extraction data

Abstract

The extraction of zinc chloride from aqueous chloride solutions has been studied as a function of the supporting LiCl electrolyte concentration. The extraction of zinc ions has been described as the distribution of the electrolyte ZnCl 2+ p Li p between two phases. The coextraction of LiCl in the organic phase has been considered also. An attempt has been made to evaluate the zinc-chloride complexes as a function of the LiCl concentrations by using the activity functions a − Cl = m − Cl · γ − ± LiCl and a Cl = m Licl · γ ± LiCl to account for the dependence of the organic chloride activity of the aqueous ligand activity on the aqueous LiCl concentration. Despite the approximations included in the use of the activity functions and other assumptions made, the parameters obtained reasonably agree with the literature data.