Copolymers for the control of the formation and deposition...

Details Copolymers for the control of the formation and deposition... Copolymers for the control of the formation and deposition...

C - Chemistry, Metallurgy

11

D

134/39

C11D 7/22 (2006.01) C02F 5/10 (2006.01)

Patent

CA 1062983

Abstract of the Disclosure The present invention relates to processes for controlling the formation and deposition of scale and sludge and in particular cal- cium phosphate which would otherwise occur in aqueous mediums con- taining the ions capable of forming sludge and the scale. The invention, more particularly, relates to the control, reduction and/or prevention of scale and sludge deposits in cooling water, scrubber and steam generating systems, evaporators, economisers, and the like by the introduction of a copolymer comprising sulfonated styrene and maleic anhydride moieties to the water used therein. The copolymers dis- covered to be effective for the purpose are those having a mole ratio of sulfonated styrene moieties to moieties derived from maleic anhydride of from about 2:1 to about 4:1. - 1 -

259627

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