Monosodium cyanuric acid slurry
AssigneeOccidental Chemical Corporation
InventorJohn R. Jany
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Abstract
Disclosed is a stable gel-like slurry having a pH of about 6.5 to about 8.5 which is a mixture of water and about 20 to about 50 wt % sodium cyanurate. Also disclosed is a method of making a water-monosodium cyanurate hydrate gel-like slurry. A slurry is formed in water of about 20 to about 50 wt % cyanuric acid. Sodium hydroxide is added to the slurry in an amount of about 90 to about 100% of stoichiometric over a period of about 40 minutes. Water can be disinfected by adding to the water an amount of water-monosodium cyanuric hydrate gel-like slurry according to this invention equivalent to a concentration of cyanuric acid in the water of about 25 to about 150 ppm and an amount of a source of chlorine sufficient to maintain a concentration of chlorine in the water between about 0.1 and about 5.0 ppm.
Claims13
A stable gel-like slurry having pseudo-plastic properties, a high yield value, and a viscosity of 50,000 to about 500,000 mPa·s comprising a mixture of water containing about 20 to about 40 wt %, calculated as unhydrated, of monosodium cyanurate monohydrate, said mixture having a pH of about 6.5 to less than 8.5.
A water-monosodium cyanurate monohydrate stable gel-like slurry having pseudo-plastic properties, a viscosity of about 50,000 to about 500,000 mPa·s and a pH of about 6.5 to less than 8.5, made by mixing for at least 40 minutes about 20 to about 50 wt % cyanuric acid in water to which has been added at least a 35 wt % aqueous solution of sodium hydroxide in an amount that is about 80 to 100 wt % of stoichiometric.
A water-monosodium cyanurate monohydrate stable gel-like slurry having a viscosity of about 50,000 to about 500,000 mPa·s and a pH of about 6.5 to less than 8.5, made by mixing for about 1 to about 4 hours about 25 to about 30 wt % cyanuric acid in water to which has been added about 95 to 100 wt % of stoichiometric of a 45 to 55 wt % aqueous solution of sodium hydroxide, where the rate of addition of said sodium hydroxide solution to said cyanuric acid is controlled to keep the maximum pH of said gel-like slurry below 8.5.
Dependencies are inferred from the claim text.