C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/49
C02F 1/28 (2006.01) C02F 1/54 (2006.01) C02F 1/56 (2006.01)
Patent
CA 1270077
Abstract of the Disclosure Methods for reducing the trihalomethane contents for precursor thereof of influent water are disclosed. The methods comprise adding to the influent water powdered activated carbon and a water soluble or water dispersible cationic polymer. The polymers are chosen from: (a) poly- quaternary ammonium polymers formed from reaction of a secondary amine with an epichlorohydrin or epoxide (b) cross-linked polyquaternary ammo- nium polymers formed from reaction of a secondary amine, epichlorohydrin or epoxide, and a third reactant selected from the group consisting of ammonia, primary amines, alkylenediamines and polyamines and (c) sub- stantially linear high molecular weight polyquaternary ammonium polymers of the type disclosed in U.S. Patent 3,288,770, such as polydiallyldi- methyl ammonium chloride.
510540
Fillipo Bruce K.
Walterick Gerald C. Jr.
Betzdearborn Inc.
Borden Ladner Gervais Llp
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