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US 7,311,878 B2Granted
Method and apparatus for producing synergistic biocide
AssigneeHercules Incorporated
InventorsFreddie L. Singleton, Michael J. Mayer, Alexander W. Breen
Life of this patent
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Abstract
An apparatus and methods to produce synergistic mixtures (or combinations) of haloamines to control growth of microorganisms in aqueous systems are disclosed. The apparatus and methods to produce synergistic mixtures entails producing a batch quantity of a haloamine and converting part of the haloamine to a second haloamine species to form the synergistic mixture.
Claims8
A method for producing an aqueous solution containing a synergistic combination of monohaloamine and dihaloamine biocide to control growth of microorganisms in an aqueous system which comprises
- a) contacting an ammonium or an amine source with a halogenated oxidant in water in amounts of each effective to produce monohaloamine, and
- b) converting a portion of the monohaloamine to a desired amount of dihaloamine by reducing the pH to a desired value below 7.0 thereby converting a desired portion of the monohaloamine to dihaloamine.
Dependencies are inferred from the claim text.