To provide an electric demineralizing apparatus from which high-purity demineralized water can be obtained stably for a long time while preventing the rise of operation voltage, and to provide an ion exchanger to be loaded in the electric demineralizing apparatus.
In the demineralizing apparatus, a demineralizing chamber and a concentrating chamber are formed by arraying at least a part of a cation exchange membrane C and at least a part of an anion exchange membrane A alternately between an anode (+) and a cathode (-). The ion exchanger is arranged in the demineralizing chamber and/or the concentrating chamber, wherein the ion exchanger is obtained by introducing an ion exchanging group into a porous base material having communicated pores and is constituted so that the density of the pores is inclined.
NAKANISHI OSAMU
AKIYAMA TORU
FUJIWARA KUNIO
TAKAHASHI YOHEI
