An electrodeionization apparatus is provided for removing ions from liquids. The apparatus is particularly well-adapted for the removal of large, heavily hydrated, highly charged or weakly ionized molecules or complexes from feed water. Such removal is achieved by substituting, in at least one section...http://www.google.es/patents/US5316637?utm_source=gb-gplus-sharePatente US5316637 - Electrodeionization apparatus