Chemistry of inorganic compounds – Halogen or compound thereof – Ternary compound
Patent
1978-03-09
1979-04-03
Hearn, Brian
Chemistry of inorganic compounds
Halogen or compound thereof
Ternary compound
423474, 423499, C01B 1104, C01B 1106
Patent
active
041477618
ABSTRACT:
A process for preparing hypochlorous acid in a sweep reactor is described in which gaseous chlorine is passed rapidly across the surface of an agitated aqueous solution of alkali metal hydroxide at a reduced temperature. The resulting gaseous product mixture of hypochlorous acid, chlorine monoxide, and unreacted chlorine is conveyed from the reactor to a suitable scrubber to produce an aqueous hypochlorous acid solution.
The aqueous reaction product of the sweep reactor is a suspension of alkali metal chloride in alkali metal hypochlorite, which is withdrawn and filtered to separate the solid. The clarified aqueous solution of alkali metal hypochlorite is reacted with the aqueous hypochlorous acid solution from the scrubber, chlorine and lime to form an aqueous slurry of calcium hypochlorite. This slurry may be granulated by the spray graining technique, for example, to produce strong rounded granules of calcium hypochlorite.
REFERENCES:
patent: 1481106 (1924-01-01), MacMahon
patent: 1609758 (1926-12-01), MacMahon
patent: 1619430 (1927-03-01), Mauran
patent: 1718285 (1929-06-01), George
patent: 2273723 (1942-02-01), Muskat
patent: 3585786 (1971-06-01), Hardison
Klanica Andrew J.
Wojtowicz John A.
Clements Donald F.
Haglind James B.
Hearn Brian
Olin Corporation
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