Appeal No. 1999-1810
Application 08/288,433
THE INVENTION
The appellant’s claimed invention is directed toward a
process for purifying an aqueous alkali metal chloride
solution containing contaminating amounts of iodide and
ammonium, and toward the solution produced by this process.
Claim 1, directed toward the process, is illustrative:
1. A process for the purification of an aqueous alkali
metal chloride solution containing a contaminating amount of
iodine in other than the periodate state, comprising (a)
oxidizing the iodine therein to the periodate oxidation state
of +7 and (b) then separating the periodate therefrom, said
aqueous alkali metal chloride starting solution further
comprising a contaminating amount of ammonium.
THE REFERENCES
Bissot 4,584,071 Apr. 22,
1986
Filippone et al. (Filippone) 5,069,884 Dec. 3,
1991
J.T. Keating et al. (Keating), “Treatment of Iodide-Containing
Brines for Use in Membrane Choroalkali Electrolysis Cells”,
307 Res. Discl. 795 (1989).
THE REJECTIONS
The claims stand rejected as follows: claims 18 and 20
under 35 U.S.C. § 112, fourth paragraph, as being of improper
3
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