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US 5,851,374 AGranted
Process for production of chlorine dioxide
AssigneeSterling Canada, Inc.
InventorsGerald Cowley, Marek Lipsztajn
Life of this patent
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Abstract
Chlorine dioxide is produced by reaction of chlorate ions, usually provided by sodium chlorate, with a persulfate in an aqueous acid reaction medium containing sulfuric acid. By-product sodium sulfate, sulfuric acid feedstock or mixture may be electrolyzed to form the persulfate for the reaction.
Claims24
A method of producing chlorine dioxide, which comprises:
- reacting chlorate ions with a persulfate in an aqueous acid reaction medium containing sulfuric acid at a temperature of at least about 50.degree. C. and below the temperature at which chlorine dioxide undergoes spontaneous decomposition.
Dependencies are inferred from the claim text.