TANNIN BASED POLYMERIC COAGULANTS COMPOSITION AND METHOD OF USE

Composition and method of use for tannin based environmentally benign pol ymeric coagulants are disclosed. Tannin based coagulants are copolymers of n aturally occurring tannins and a cationic monomer. One embodiment of the pre sent invention provides for a composition of a tannin based polymeric coagul ant which is comprised of N,N-(dimethylaminoethyl) methacrylate (MADAME) pol ymerized using t- butylhydroperoxide and sodium metabisulfite. The resulting poly M AD AME is converted to hydrochloride and then blended /reacted in an aqueous medium with tannin to obtain a homogenous poly(MADAME)-Tannin compo sition. The method of use comprises adding an amount of the composition effe ctive for the purpose of clarifying oily wastewater from food and beverage, steel, automotive, transportation, refinery, pharmaceutical, metals, paper a nd pulp, chemical processing and hydrocarbon processing industries.