Ion exchange

Details Ion exchange Ion exchange

2006-02-21

2006-02-21

Barry, Chester T. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C502S011000, C502S402000

Reexamination Certificate

active

07001523

ABSTRACT:
An ion exchange material comprising a superabsorbent polyurethane foam having an ion exchange medium contained therein. The ion exchange may be used in a process for the extraction of metal anions and cations from solutions and/or slurries including the steps of: (a) contacting a metal ion-containing solution with an ion exchange material comprising a superabsorbent polyurethane foam having an ion exchange medium contained therein; (b) separating the ion exchange material from the solution and/or slurry; and (c) recovering the sorbed metal ions from the ion exchange medium.

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M.P. Maloney, et al., “Extraction and Separation of metal Ions by Foam-supported Reagents”,Proceedings of the Society for Analytical Chemistry. Analytical Division. Chemical Society, London, GB, vol. 14, No. 9, pp. 244-246 (Sep. 1977).
Chiarizia et al., “Diphonix® Resin: A Review of Its Properties and Applications”Sep. Sci. and Technol. 32, 1-4 (1997) pp. 1-35.

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