Studies on the kinetics of extracting copper from chloride medium (CuCl2-NaCl-HCl)with HS-LIX65N(Escaid 100 as the diluent)in a Lewis cell was carried out. In this article

the effect of the different compositions of the two phases on the extraction rate of copper was studied. Considering that the controlling regime of copper extraction in such a system was the interfacial chemical reaction related with adsorption and de-sorption

our experimental results indicated that the formation of 1 - 2 complex (i. e.

CuR2)

was the controlling reaction step

and species of CuCl+ were the main extracted species under the experimental conditions employed. Theoretical analysis led to the development of the following model: where

[RH]i - concentration of species at the interface; a- The activity of species in the bulk phase. The average deviation of computed results from experimental data were found to be 5.29% only.