Scale control in aqueous systems

Details Scale control in aqueous systems Scale control in aqueous systems

C - Chemistry, Metallurgy

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C23F 14/02 (2006.01) C02F 5/00 (2006.01) C02F 5/02 (2006.01) C02F 5/08 (2006.01) C02F 5/12 (2006.01) C02F 5/14 (2006.01) C07F 9/30 (2006.01) C08F 20/06 (2006.01) C08F 222/08 (2006.01) C23F 11/14 (2006.01) C23F 11/167 (2006.01) C23F 11/173 (2006.01)

Patent

CA 2029073

A composition and process for preventing the deposition of scale and sludge in aqueous systems comprising adding to the system the combination of three or more additives selected from the group consisting of a) polyacrylic acid, copolymer of alkylsulfonate and malefic anhydride and mixtures thereof, b) hydroxy ethylidene diphosphonic acid, amino (trimethyl phosphonic acid), diethylenetriamine pentaacetic acid, and mixtures thereof, and c) copolymer of styrene sulfonate and malefic anhydride, copolymer of acrylic acid and acrylamide, poly(acrylic acid-co-hypophosphite) and mixtures thereof, and wherein the combination contains at least one additive selected from each of a), b) and c).

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