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US 5,292,449 AGranted
Scale inhibiting composition
AssigneeAkzo N.V.
InventorLawrence L. Shyu
Life of this patent
Estimating the term…
Abstract
Scale inhibition in a water treatment system can be achieved by using a composition which combines a butenedioic acid, such as maleic acid and/or fumaric acid, phosphorous acid, and a peroxide, such as hydrogen peroxide.
Claims12
A scale inhibiting composition for use in water treatment systems which comprises a combination of from about 10% to about 60%, by weight of the composition, of a water soluble unsaturated dicarboxylic acid, from about 3% to about 45%, by weight of the composition, of phosphorous acid, and from about 15% to about 80%, by weight of the composition, of a peroxide.
Dependencies are inferred from the claim text.