Betz Laboratories, Inc.

Betzdearborn, Inc.

Other

Ge Betz, Inc.

Gerald C Walterick, Jr

Fu Chen

Jen-Chi Chen

Stephen Robert Vasconcellos

Bruce K Fillipo

Chihyu Sui

The present invention relates to foam control compositions and methods for controlling foam in aqueous media by adding to the system an effective amount of the foam control agent of the present invention. The antifoam/defoam compositions of the present invention include a concentration of active ingredients such as a polyalkylene glycol, a fatty alcohol alkoxylate, and an ethylene oxide-propylene oxide block copolymer, the compositions carried in polybutene and surfactants selected from polyethylene glycol esters, sorbitan esters, polyoxyethylene/polyoxypropylene fatty acid esters, and dialkyl phthalate. These compositions have been found to be superior in controlling foam versus conventional defoamers. The benefits of the foaming control effect are more evident at moderate to high temperatures and high caustic aqueous media such as Bayer process liquors.

Foam control in aqueous media

The invention relates to methods and compositions for controlling foam, i.e., defoaming or inhibiting the formation thereof, in aqueous systems including wastewater systems and in aqueous industrial process systems by adding primary alcohol, alcohol alkoxylate, and emulsifier to the aqueous system, such as in a stable aqueous composition.

Foam control composition and method for controlling foam in aqueous systems

Tannin containing polymers, their method of production and methods of using as water treatment agents are disclosed. The tannin containing polymers comprise copolymers of tannin and a cationic monomer. Another embodiment comprises tannin containing polymers of tannin, cationic monomer and at least one monomer selected from the group consisting of an anionic monomer and a nonionic monomer.

Composition and method for water clarification

Tannin containing polymers, their method of production and methods of using as water treatment agents are disclosed. The polymers are aldehyde-free and comprise copolymers of tannin and a cationic monomer. Another embodiment comprises aldehyde-free polymers of tannin, cationic monomer and at least one monomer selected from the group consisting of an anionic monomer and a nonionic monomer.

Composition comprising a tannin-containing copolymer

The use of quaternized polyvinylamines for use in water clarification is disclosed.

Quaternized polyvinylamine water clarification agents

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.

Composition for reducing color contamination of influent water

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.

Process for reducing the content of trihalomethane compounds and

Methods 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. In a particularly unique aspect of the invention, the P.A.C. component is provided in the form of a slurry comprising a polysaccharide material such as a hydroyethyl or carboxymethyl cellulose material.

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Levittown, PA, United States of America

Gerald C Walterick, Jr