Patent ID: 7201832

Claim:
An electrodeionization deionized water producing apparatus having a deionizing chamber packed with an organic porous ion exchange material having a continuous pore structure comprising interconnected macropores and mesopores with a median diameter of 1 to 1000 μm existing on the walls of the macropores, the organic porous ion exchange material having a total pore volume of 1 to 50 mL/g, uniformly distributed ion exchanging groups, and an ion exchange capacity of 0.5 meq./g or more on a dry basis, wherein deionized water is produced by eliminating ionic impurities in water by passing water through the deionizing chamber and, at the same time, the ionic impurities adsorbed in the organic porous ion exchange material is discharged outside the system by applying a direct electric current to the deionizing chamber, the electrodeionization deionized water producing apparatus being characterized by applying the direct electric current so that the ions to be discharged are electrophoretically moved in the direction reverse to the flow of water through the organic porous ion exchange material.