Process for removing perchlorate ions from water streams

Details Process for removing perchlorate ions from water streams Process for removing perchlorate ions from water streams

2007-12-18

2007-12-18

Barry, Chester T. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S669000, C210S683000, C210S284000

Reexamination Certificate

active

11219335

ABSTRACT:
Methods and systems for removing perchiorate from water are disclosed which involve the use of a plurality of vessels containing an ion exchange resin having affinity for perchiorate ions, and in which perchiorate-contaminated water is passed over the resin in some but not all of the plurality of vessels operating in parallel to one another thereby removing perchlorate ion from the water stream and generating reduced perchlorate content product water streams and in which a subset of the plurality of vessels is removed from service, their resin is removed and replaced and they are returned to service.

REFERENCES:
patent: 6066257 (2000-05-01), Venkatesh et al.
patent: 6398965 (2002-06-01), Arba et al.
patent: 2002/0117431 (2002-08-01), Jensen et al.
International Search Report, PCT/US05/32260, dated Jul. 17, 2006.

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