chlorine ozone ozone oxygen mixtures by means of strongly oxidising agents hypochlorite hydrogen peroxide among others or mixtures between gases and oxidising reagents instead the system of the invention is a technology that allows a radical differentiation since it is a membrane cell device which is capable of electrolytically precipitating the metal of interest which is desired to be produced as a cathode without requiring a prior purification or concentration process and simultaneously generate at the anode the oxidising agent for reuse in the leaching process that is it replaces the purification concentration precipitation processes of the metal of interest either from cementation filtration chemical precipitation sedimentation filtration or solvent extraction electrowinning processes eliminating at the same time much of the effluents currently generated fig1 shows in isometric view the base unit of a membrane cell device 3 as in chilean patent application no 2014 03049 wherein a cathode compartment 4 and an anode compartment 5 separated by a selective and unidirectional ion exchange membrane can be observed this electrolytic device intended for forced or non forced electrolytic processes and using two independent electrolytes conveniently selected from the energy point of view and which allow the electrolytic precipitation of the metal of interest in a controlled manner with high efficiency of faradic current and with a high energy performance this membrane cell device.