Electrodeionization method and apparatus
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United States of America Patent
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Jun 5, 1990
Issued Date -
N/A
app pub date -
Nov 23, 1988
filing date -
May 11, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electrodeionization apparatus is provided for removing ions from liquids. Liquid to be purified is passed through at least two ion depletion compartments containing mixed anion and cation exchange resin beads in a given separation stage. A second liquid is passed through concentration compartments free of ion exchange resin beads. Ions under the influence of D.C. potential pass from the depletion compartments into the concentration compartments through ion permeable membranes. The beads in the depletion compartments are housed within subcompartments of controlled width and thickness and are retained therein by the ion permeable membranes which are secured to the walls of the subcompartments.
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