Generation of chlorine dioxide for disinfection and sterilization
AssigneeMinnesota Mining and Manufacturing Company
InventorStephen R. Hartshorn
Life of this patent
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Abstract
Chlorine dioxide is generated from aqueous liquids container alkali metal or alkaline earth metal chlorites, and compounds which liberate chlorine in water. Dry, stable, solid compositions, in one or two parts, can be made from these and other ingredients.
Claims25
A method of generating chlorine dioxide in an aqueous liquid containing an alkali metal or alkaline earth metal chlorite by adding to the aqueous liquid a water-soluble solid composition containing a chlorine-releasing component consisting of a compound or mixture of compounds which is stable when dry but releases chlorine when dissolved in water, the chlorine released generating chlorine dioxide by reaction with the alkali metal or alkaline earth metal chlorite.
A stable solid composition for addition to water to give a disinfecting and/or sterilizing solution comprising:
- (a) a chlorine-releasing component consisting of compound or mixture of compounds which will release chlorine when in contact with water,
- (b) an alkali metal or alkaline earth metal chlorite,
- (c) a buffer, and optionally
- (d) a dessicant to prevent premature chlorine release from the solid composition,
- (e) an effervescent reagent which will react to give effervescence when dissolved in water,
- (f) a surfactant which is stable in the presence of oxidizing agents,
- (g) a lubricant to assist in release from a tableting machine,
- (h) a filler to maintain the compositions as a readily dispensible powder or provide sufficient bulk for the composition to be made into a tablet.
A stable solid composition for addition to an aqueous stabilized chlorine dioxide solution to give a release of chlorine dioxide and so give a disinfecting and/or sterilizing solution, comprising:
- (a) a chlorine-releasing component which will release chlorine when in contact with water, and
- (c) a buffer.
Dependencies are inferred from the claim text.