Electrodeionization apparatus comprising sub-desalination chambers
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United States of America Patent
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Aug 14, 2001
Grant Date -
N/A
app pub date -
Mar 22, 2000
filing date -
Mar 25, 1999
priority date (Note) -
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Abstract
Two sub-desalination chambers d.sub.1 and d.sub.2 are defined by a cation exchange membrane 3 on one side, an anion exchange membrane 4 on the other side, and an intermediate ion exchange membrane 5 in between and are filled with ion exchange materials 8 to construct a desalination chamber D. Concentrating chambers 1 are provided via the cation exchange membrane 3 and the anion exchange membrane 4 on both sides of the desalination chamber D. The desalination chambers D and the concentrating chambers 1 are provided between an anode 7 and a cathode 6. While a voltage is applied between the anode 7 and the cathode 6, water is supplied to one of the two sub-desalination chambers d.sub.2 and then, water discharged from the first sub-desalination chamber d.sub.2 is supplied to a second sub-desalination chamber d.sub.1. Concentrate water is supplied to the concentrate chambers.
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