Fluorine removal by ion exchange

Details Fluorine removal by ion exchange Fluorine removal by ion exchange

2004-01-16

2008-12-30

Nguyen, Ngoc-Yen M (Department: 1793)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Halogenous component

C423S24000R, C423S483000, C210S670000, C210S673000, C210S683000

Reexamination Certificate

active

07470413

ABSTRACT:
A method for removing fluorine gas from a selected environment comprises contacting the fluorine gas with water to generate a solution of hydrofluoric acid and contacting the solution of hydrofluoric acid with an ion exchange resin having an active state operative to exchange selected ions therein for fluoride ions in the solution. The apparatus (200) may include a dual resin setup (222, 223) such that one of the ion-exchange resin can be in the service cycle while the other of the ion-exchange resins undergoes the regeneration and rinse/refill cycles.

REFERENCES:
patent: 4486390 (1984-12-01), Schmiedel
patent: 4735786 (1988-04-01), Inoue et al.
patent: 5059406 (1991-10-01), Sheth et al.
patent: 2 300 129 (1973-01-01), None
patent: 2300129 (1974-07-01), None
patent: 36 23 983 (1987-03-01), None
patent: 07 232915 (1995-09-01), None
Tateno Toshio; Abstract of Publication No. JP 07232915; “Method for Recovering Fluorine in Waste Water,” Morita Kagaku Kogyo KK; Sep. 5, 1995.
Supplementary European Search Report of Application No. EP 05705316 mailed Feb. 28, 2007; Date of Completion of the Search: Feb. 20, 2007.
PCT Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration of International Application No. PCT/ US05/00598; Date of mailing: Feb. 22, 2006.
PCT International Search Report of International Application No. PCT/ US05/00598; Date of mailing of the International Search Report: Feb. 22, 2006.
PCT Written Opinion of the International Searching Authority of International Application No. PCT/US05/00598; Date of mailing: Feb. 22, 2006.

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