Composition and method for water clarification
AssigneeBetzDearborn Inc.
InventorsJen-Chi Chen, Fu Chen, Gerald C. Walterick, Jr., Stephen R. Vasconcellos
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Abstract
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.
Claims24
A method for removing contaminants from wastewater comprising adding to said wastewater an aldehyde-free water soluble or dispersible copolymer of a tannin and a cationic monomer selected from the group consisting of quaternary ammonium salts of dialkylaminoalkyl(meth)acrylamides, dialkylaminoalkyl(meth) acrylates and diallyl dialkyl ammonium chloride.
A method for removing contaminants from wastewater comprising adding to said wastewater an aldehyde-free water soluble or dispersible polymer of a tannin, a cationic monomer selected from the group consisting of quaternary ammonium salts of dialkylaminoalkyl(meth)acrylamides, dialkylaminoalkyl(meth)acrylates and diallyl dialkyl ammonium chloride and at least one monomer selected from the group consisting of an anionic monomer and a nonionic monomer.
Dependencies are inferred from the claim text.