Method of treating with chlorine dioxide
OwnerJohn Masoninventor
Life of this patent
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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.
Claims23
An aqueous solution of chlorine dioxide that is stable over a long storage period, 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 a chlorine dioxide concentration in the range of about 10 to 3000 mg/l, pH in the range of 1 to 6, and 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.
A method for making an aqueous solution of chlorine dioxide that is stable over a long storage period, comprising:
- a) dissolving chlorine dioxide in water, and
- b) adding a chlorine scavenging means for converting dissolved chlorine to chlorine dioxide,
- wherein said aqueous solution is prepared to initially have a chlorine dioxide concentration in the range of about 10 to 3000 mg/l, pH in the range of about 1 to 6, and 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.
A method for distributing aqueous chlorine dioxide that is stable over a long storage period comprising the steps of:
- a) making an aqueous solution of chlorine dioxide by dissolving chlorine dioxide in water, and adding a chlorine scavenging means for converting dissolved chlorine to chlorine dioxide,
- b) filling a storage container with the aqueous solution of chlorine dioxide for use by an end-user over said long storage period, and
- c) maintaining the chlorine dioxide concentration of the aqueous solution in said storage container,
- wherein said aqueous solution is prepared to initially have a chlorine dioxide concentration in the range of about 10 to 3000 mg/l, pH in the range of about 1 to 6, and 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.
A method for using aqueous chlorine dioxide that is stable over a long storage period comprising the steps of:
- a) making an aqueous solution of chlorine dioxide by dissolving chlorine dioxide in water, and adding a chlorine scavenging means for converting dissolved chlorine to chlorine dioxide,
- b) filling a storage container with the aqueous solution of chlorine dioxide for use by an end-user over said long storage period,
- c) maintaining the chlorine dioxide concentration of the aqueous solution in said storage container, and
- d) dispensing the aqueous chlorine dioxide solution from the storage container for use as needed over a period of at least two days,
- wherein said aqueous solution is prepared to initially have a chlorine dioxide concentration in the range of about 10 to 3000 mg/l, pH in the range of about 1 to 6, and 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, 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 of at least 2 days with less than 10% loss in concentration of the chlorine dioxide.
Dependencies are inferred from the claim text.