Process for reducing the content of trihalomethane compounds and

Details Process for reducing the content of trihalomethane compounds and Process for reducing the content of trihalomethane compounds and

1987-02-25

1988-04-12

Hruskoci, Peter

Liquid purification or separation

Processes

Ion exchange or selective sorption

210694, 210728, 210736, 210908, C02F 128

Patent

active

047372931

ABSTRACT:
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) 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.

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