Ion exchanger

Chemistry: electrical and wave energy – Apparatus – Electrophoretic or electro-osmotic apparatus

Reexamination Certificate

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Reexamination Certificate

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07393445

ABSTRACT:
A porous ion exchanger includes an open cell structure including interconnected macropores and mesopores whose average diameter is in a range of 1 to 1000 μm existing on walls of the macropores. Moreover, a total pore volume is in a range of 1 to 50 ml/g, ion exchange groups are uniformly distributed, and an ion exchange capacity is not less than 0.5 mg equivalent/g of dry porous ion exchanger. The porous ion exchanger can be used as an ion exchanger filled into a deionization module of an electrodeionization water purification device, solid acid catalyst, adsorbent, and filler for chromatography.

REFERENCES:
patent: 6811684 (2004-11-01), Mohr et al.
patent: 7033472 (2006-04-01), Yamanaka et al.
patent: 7173066 (2007-02-01), Inoue et al.
Office Action from the U.S. Patent and Trademark Office mailed on Jul. 12, 2007, In the prosecution of U.S. Appl. No. 11/301,122, 8 pages.

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