The kinetics of stripping copper from loaded HS-LIX 65N with NaCl-HC1 solution was carried out in a Lewis cell. Experimental results showed that the stirring speed of agitators in the two phases did not seem to have any significant effect on the stripping rate of copper. However

the stripping rate of copper was apparently almost proportional to the interfacial area between the two phases. In addition a relatively high value of apparent activation energy was apparent for the stripping process

featuring interfacial chemical reaction characteristics. Mathematical models were developed with experimental results obtained of which a typical one was given below: where

concentration was expressed in mol/l

and computational deviation was found to be around 0.5%. It was concluded

therefore

that the controlling regime in the system was the interfacial chemical reaction related with adsorption and desorption.