Hypochlorous acid process
AssigneeOlin Corporation
InventorsJames P. Brennan, John A. Wojtowicz, Preston H. Campbell
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Abstract
A process for preparing hypochlorous acid is described in which gaseous chlorine is reacted with an aqueous solution of alkali metal hydroxide in a finely divided mist form at an elevated temperature sufficient to prevent condensation of the gaseous product. Gaseous hypochlorous acid product is immediately separated from the resulting solid alkali metal chloride as it is formed and is then scrubbed with water to form an aqueous hypochlorous acid solution. This solution may be reacted with lime to produce calcium hypochlorite.
Claims22
A process for preparing hypochlorous acid which comprises:
- a. reacting an aqueous solution of an alkali metal hydroxide in finely divided droplet form,
- b. with gaseous chlorine,
- c. to form hypochlorous acid
- d. and solid alkali metal chloride,
- e. at an elevated temperature to vaporize hypochlorous acid as it forms, and
- f. separating said vaporized hypochlorous acid from the resulting solid alkali metal chloride.
A process for preparing calcium hypochlorite which comprises:
- a. reacting an aqueous solution of an alkali metal hydroxide in finely divided droplet form,
- b. with gaseous chlorine,
- c. to form hypochlorous acid,
- d. and solid alkali metal chloride,
- e. at an elevated temperature to vaporize hypochlorous acid as it forms,
- f. separating said vaporized hypochlorous acid from the resulting solid alkali metal chloride,
- g. contacting said vaporized hypochlorous acid with an aqeuous medium to produce an aqueous solution of hypochlorous acid,
- h. said aqueous solution of hypochlorous acid is reacted with lime, chlorine and alakli metal hydroxide to produce an aqueous slurry of calcium hypochlorite, and
- i. dewatering said aqueous slurry to produce granular calcium hypochlorite particles.
Dependencies are inferred from the claim text.