and copper electrowinning are the two embodiments discussed herein but it is to be understood that any of the metals discussed previously may be used in this process it is also to be understood that the anolytic solution may vary depending on which electrochemical reaction is occurring and this is limited only by cell geometry and current densities as can be easily ascertained by one skilled in the art samples of this anolyte and catholyte were taken for analysis before during and after the electrolysis experiments to find anode current efficiencies and to evaluate the effectiveness of the membrane standard volumetric geometric spectrophotometric and potentiometric analytical techniques were used to determine the concentration of cu 2 zn 2 clo 3 clo 4 so 4 2 and na in solution zn and cu electrowinning efficiencies were calculated from the weight of the cathode deposit the data acquired from operation of the cell provided information on a the condition required for each half cell to function simultaneously at compatible current densities and temperatures b electrolysis energy requirements and c the efficiency of the permselective membrane to provide physical separation and electrical connection of the anolyte and catholyte the results of the experiments are broken down into the effects on current density and voltage fig2 shows typical polarization curves for the reactions studied in this cell in the anodic oxidation of naclo 3 to naclo 4 the reaction kinetics increasingly favor the electrolysis of water at current densities below 10 a dm 2 the maximum current density for zinc and copper electrowinning is usually less than that of naclo 3 to naclo 4 reaction thus to operate.