Electrolyzer for the electrolysis of a solution of a salt for the production of a solution containing an acid and a solution of a base, said electrolyzer comprising at least one elementary cell divided into three compartments by two cation-exchange membranes, the first of said compartments...http://www.google.com/patents/US5776328?utm_source=gb-gplus-sharePatent US5776328 - Apparatus and process for electrochemically decomposing salt solutions to form the relevant base and acid 
