C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
134/39
C02F 5/10 (2006.01) C11D 7/22 (2006.01)
Patent
CA 1079604
TITLE: POLYMERS FOR USE IN WATER TREATMENT Abstract of the Disclosure The present invention relates to processes for controlling the formation and deposition of scale and/or suspended solid matter which otherwise would occur in aqueous mediums containing scale imparting ions and dispersed particles, The invention, more particularly, re- lates to the control of the formation of, the reduction and/or the pre- vention of the deposition of calcium phosphate, magnesium silicate and/or iron oxide, clay and mixtures thereof in cooling water, scrub- ber and steam generating systems, evaporators, economisers and the like by the introduction of an effective amount for the purpose of a water soluble polymer composed primarily of moieties derived from acrylic acid or water soluble salt thereof and hydroxy lower alkyl acrylate moieties or water soluble salt thereof to the water used therein. The polymers discovered to be effective for the purpose are those preferably having a mole ratio of from about 34 : 1 to about 1 : 4 of acrylic acid to hydroxylated lower alkyl acrylate moieties. The lower alkyl is an alkyl of from 2 to 6 carbon atoms. -1-
253716
Godlewski Irene T.
Libutti Bruce L.
Schuck Joseph J.
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