Ion exchanger

Details Ion exchanger Ion exchanger

2005-12-12

2008-09-16

Pezzuto, Helen L. (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Ion-exchange polymer or process of preparing

C521S061000, C521S142000, C521S146000, C521S149000, C523S218000

Reexamination Certificate

active

07425583

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: 5624875 (1997-04-01), Nakanishi et al.
patent: 5824622 (1998-10-01), Harmer et al.
patent: 6811684 (2004-11-01), Mohr et al.
patent: 7033472 (2006-04-01), Yamanaka et al.
patent: 7173066 (2007-02-01), Inoue et al.
Supplementary European search report for European patent application No. 02714422.9, PCT/JP0203326, mailed Dec. 14, 2005, 3 pages.
Communication pursuant to Article 96(2) EPC, for European patent application No. 02 714 422.9, mailed Feb. 13, 2007, 5 pages.
U.S. Patent and Trademark Office Notice of Allowance for U.S. Appl. No. 11/301,053, mailed Sep. 19, 2006, 8 pages.

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