Composition and method for inhibiting scale

Details Composition and method for inhibiting scale Composition and method for inhibiting scale

C - Chemistry, Metallurgy

02

F

134/39

C02F 5/10 (2006.01) C02F 5/14 (2006.01)

Patent

CA 1234327

COMPOSITION AND METHOD FOR INHIBITING SCALE Abstract of the Disclosure The accumulation of scale in an aqueous system is inhibited by the addition of a copolymer of maleic acid or anhydride or fumaric acid and allyl sulfonic acid and a water soluble organic phosphonic acid such as aminotri(methylene phosphonic acid), ethylenediaminetetra(methylene phosphonic acid), hydroxyethylidene diphosphonic acid and 2-phosphonobutane tricarboxylic acid-1,2,4 or water soluble salts thereof. Scale can actually be removed by the addition of these materials to pressurized boiler water systems. Allyl or vinyl copolymers, a phosphonate, and optionally a water soluble, hardness precipitating agent such as a carbonate or a phosphate may be used when treating pressurized boilers to provide an in-service cleaning effect.

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