Tannin based polymeric coagulants composition and method of use

Details Tannin based polymeric coagulants composition and method of use Tannin based polymeric coagulants composition and method of use

C - Chemistry, Metallurgy

02

F

C02F 1/56 (2006.01) C02F 1/54 (2006.01)

Patent

CA 2672467

Composition and method of use for tannin based environmentally benign polymeric coagulants are disclosed. Tannin based coagulants are copolymers of naturally occurring tannins and a cationic monomer. One embodiment of the present invention provides for a composition of a tannin based polymeric coagulant which is comprised of N,N-(dimethylaminoethyl) methacrylate (MADAME) polymerized 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 composition. The method of use comprises adding an amount of the composition effective for the purpose of clarifying oily wastewater from food and beverage, steel, automotive, transportation, refinery, pharmaceutical, metals, paper and pulp, chemical processing and hydrocarbon processing industries.

L'invention concerne une composition et un procédé d'utilisation pour des coagulants polymères à base de tannin sans danger pour l'environnement. Les coagulants à base de tannin sont des copolymères de tannins naturels et un monomère cationique. Un mode de réalisation de la présente invention concerne une composition d'un coagulant polymère à base de tannin composé de méthacrylate de N,N-(diméthylaminoéthyle) (MADAME) polymérisée en utilisant de l'hydroperoxyde de t-butyle et du métabisulfite de sodium. Le poly(MADAME) résultant est converti en chlorhydrate, puis mélangé/mis à réagir dans un milieu aqueux avec du tannin pour obtenir une composition homogène de poly(MADAME)-tannin. Le procédé d'utilisation comprend l'ajout d'une quantité de la composition efficace pour clarifier des eaux usées huileuses provenant des industries de l'alimentation et des boissons, de l'acier, de l'automobile, des transports, du raffinage, des produits pharmaceutiques, des métaux, du papier et de la pâte à papier, du traitement chimique et du traitement des hydrocarbures.

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