Preparation and use of biocidal solutions
OwnerTimothy John Parkinson, Arthur Harrisinventors
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Abstract
A solution for genenting chlorine dioxide is disclosed. Th solution comprises a chlorlte, a chlorite donor, an alkali and water. The chlorine dioxide is released by adding an acid to the solution. Also disclosed are methods for preparing and using the solution.
Claims28
A stable solution for the production of chlorine dioxide comprising:
- a chlorite,
- a chlorine donor,
- an alkali, and
- water,
- the chlorite and chlorine donor being present in a molar ratio from 10:0.1 to 1.0:15.0 chlorite to chlorine donor, the alkali being present in an amount sufficient to ensure a pH of at or above 10 and the water being present in an amount to give a theoretical minimum concentration of 0.5 ppm chlorine dioxide.
A solution as claimed in any of the previous claims wherein the chlorine donor is an alkali metal hypochlorite.
A solution as claimed in any of the preceding claims in which the molar ratio of chlorite to chlorine donor is from 1.0:0.3 to 1.0:5.0.
A solution as claimed in any of the previous claims wherein the pH is above 11.
A solution as claimed in any of the previous claims wherein the pH is above 12.
A solution as claimed in any of the preceding claims wherein the theoretical concentration of chlorine dioxide is from 20,000 to 50,000 ppm.
A solution as claimed in any of the preceding claims which further comprises a biocide.
A solution as claimed in any of the preceding claims which further comprises a penetrating agent.
A method of introducing chlorine dioxide to a system for bleaching or disinfection, the method comprising reacting a chlorite, a hypochlorite and an acid to generate chlorine dioxide in situ.
Dependencies are inferred from the claim text.