Caracterización de un reactor electroquímico operando en modo galvanostático para la recuperación de baños agotados de mordentado

Abstract

In the treatment of the exhausted etching baths of metallic plastics industries, electrochemical reactors filter press type, at a pilot scale are used for the recovery of hexavalent chromium, through the oxidation of trivalent chromium on an lead anode. This research focused on the study of a reactor having three separate compartments, in order to study their behavior when operating in galvanostatic mode, at 4 and 8 A, with real etching bath solutions. The following basic parameters for the design of electrochemical reactors were evaluated: electrical performance, the degree of reached conversion, the specific productivity and specific energy consumed by coupling the electrochemical reactor with one and two ceramic spacers, elaborated with 250 kg/cm2 and 0% of starch content, resulting in a reactor with adequate performance for which there is less operation time assigned, good productivity and low power consumption when operating at 8 A.