Chemistry: electrical and wave energy – Processes and products – Electrophoresis or electro-osmosis processes and electrolyte...
Reexamination Certificate
2008-09-23
2008-09-23
Phasge, Arun S (Department: 1795)
Chemistry: electrical and wave energy
Processes and products
Electrophoresis or electro-osmosis processes and electrolyte...
C204S536000, C204S632000
Reexamination Certificate
active
11445954
ABSTRACT:
An electrodeionization (EDI) apparatus and method comprising an ion-depleting chamber for removing ions from liquids passed therethrough, wherein a resistive component is coupled proximate the outlet region of the chamber so as to increase the electrical resistance of the outlet region of the chamber with respect to the inlet region of the chamber. The resistive component may be coupled to the ion-selective membranes bordering the diluting chamber and/or the concentrate chambers. In an alternative embodiment, the resistive component may be coupled between the ion-exchanging media particles themselves within the ion-depleting chambers. In each embodiment, the electrical resistance of the outlet region is increased with respect to the inlet region of the chamber, with results being that electrical current is shifted from the outlet region toward the inlet region, thus enhancing overall deionization performance of the EDI device.
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Grabowski et al., “The production of high-purity water by continuous electrodeionization with bipolar membranes: Influence of the anion-exchange membrane permselectivity” Journal of Membrane Science, Elsevier Scientific Publ., Company, Amsterdam, NL, vol. 281, No. 21-2, Apr. 18, 2006.
General Electric Company
Phasge Arun S
Wegman Hessler & Vanderburg
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