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US 7,678,388 B2Granted
Method of treating with chlorine dioxide
OwnerJohn Y. Masoninventor
Life of this patent
Estimating the term…
Abstract
An aqueous chlorine dioxide solution which comprises dissolved chlorine dioxide in a concentration of about 10 to 3000 mg/l, pH in the range of about 1 to 6, and a chlorine scavenging means such as sodium chlorite in a ratio in the range of about 1:4 to 1:15 (w/w) sodium chlorite to chlorine dioxide. The chlorine dioxide solution may be stored for use over a period of several days to several months.
Claims24
An aqueous solution of chlorine dioxide that remains stable for two or more days, comprising:
- a) dissolved chlorine dioxide, and
- b) chlorine scavenging means for converting dissolved chlorine to chlorine dioxide, said aqueous solution being prepared to initially have:
- i) a chlorine dioxide concentration in the range of about 1000 to 3000 mg/l,
- ii) a pH in the range of 1 to 6, and
- iii) a ratio of chlorine scavenging means:chlorine dioxide in the range of about 1:4 to 1:15 (w/w) based on a sodium chlorite to chlorine dioxide system.
2 more elements
An aqueous solution of chlorine dioxide comprising:
- a) dissolved chlorine dioxide, and
- b) chlorine scavenging means for convening dissolved chlorine to chlorine dioxide, said aqueous solution being prepared to initially have:
- i) a chlorine dioxide concentration in the range of about 2000 to 3000 mg/l,
- ii) a pH in the range of about 5 to 6, and
- iii) a ratio of chlorine scavenging means:chlorine dioxide in the range of about 1:10 to 1:15 (w/w), and wherein the pH and ratio of the initially prepared aqueous solution are selected so that the chlorine dioxide concentration in the aqueous solution may be maintained at normal atmospheric pressure over a storage period in the range of at least 2 to 90 days with less than 10% loss in concentration of the chlorine dioxide.
2 more elements
Dependencies are inferred from the claim text.