Process for the production of highly pure concentrated slurries of sodium hypochlorite
AssigneeOlin Corporation
InventorsBudd L. Duncan, Richard C. Ness
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Abstract
A process for producing sodium hypochlorite slurries admixes a hypochlorous acid solution having a concentration of 35 percent or greater by weight of HOCl with sodium hydroxide at a temperature below about 25.degree. C. The reaction produces a slurry of sodium hypochlorite pentahydrate in an aqueous solution of sodium hypochlorite where the sodium hypochlorite is present in a concentration of at least 35 percent by weight of NaOCl. The sodium hypochlorite slurries have improved stability and greatly reduced amounts of sodium chloride. The process for produces high strength sodium hypochlorite compositions of high purity having improved yields and reduced product decomposition.
Claims9
A process for producing sodium hypochlorite pentahydrate which comprises admixing a hypochlorous acid solution having a concentration of 35 percent or greater by weight of HOCl with sodium hydroxide at a temperature from about 15.degree. C. to about 23.degree. C. to produce a slurry of sodium hypochlorite pentahydrate in an aqueous solution of sodium hypochlorite, the sodium hypochlorite being present in a concentration of at least 35 percent by weight of NaOCl.
A process for producing sodium hypochlorite pentahydrate which comprises admixing a hypochlorous acid solution, having a concentration of 35 percent or greater by weight of HOCl, with sodium hydroxide at a temperature in the range of about 25.degree. to about 35.degree. C. to produce a saturated solution of sodium hypochlorite, and cooling the saturated solution of sodium hypochlorite to a temperature below about 25.degree. C. to produce a slurry of sodium hypochlorite pentahydrate in an aqueous solution of sodium hypochlorite, the sodium hypochlorite being present in a concentration of at least 35 percent by weight of NaOCl.
Dependencies are inferred from the claim text.