Compositions – Water-softening or purifying or scale-inhibiting agents – Plant or organic material containing
Patent
1987-05-01
1988-08-23
Wax, Robert A.
Compositions
Water-softening or purifying or scale-inhibiting agents
Plant or organic material containing
523414, 523468, 524495, 524496, 524548, 524555, 524808, 524815, C02F 156
Patent
active
047659238
ABSTRACT:
Methods and compositions for reducing organic color contamination in 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) polyquaternary ammonium polymers formed from reaction of a secondary amine with an epichlorohydrin or epoxide (b) cross-linked polyquaternary ammonium 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) substantially linear high molecular weight polyquaternary ammonium polymers of the type disclosed in U.S. Pat. No. 3,288,770, such as polydiallyldimethyl ammonium chloride. Compositions comprise a slurry comprising powdered activated carbon and at least one polymer chosen from the (a) (b) and (c) groupings and mixtures thereof.
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Betz Laboratories Inc.
Ricci Alexander D.
Tobe Roslyn T.
Wax Robert A.
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