Patent ID: 6596145
Filing Date: 2003-07-22
Classification: B01D,B01J,C02F

Abstract:
A system for the electrodeionization of liquids comprising a cathode, an anode spaced apart from the cathode, an electrical potential supplied between the cathode and anode, an anion permeable membrane spaced apart from the anode and defining a first waste channel between the anion permeable membrane and the anode, a cation permeable membrane spaced apart from the cathode and defining a second waste channel between the cation permeable membrane and the cathode, said anion permeable membrane and said cation permeable membrane being adjacent but spaced apart from each other so as to define a product channel, said product channel containing a mixed bed of ion exchange materials, said materials being anion selective and cation selective, said first and second waste channels containing a mixed bed of ion exchange materials, said materials comprising cation selective materials and anion selective materials, wherein the anion selective materials are selected from the group consisting of either only anion materials having low affinity for the selected anion specie(s) or a blend of anion materials having low affinity for the selected anion specie(s) and Type I ion materials.