Dehalogenation of halogenated hydrocarbons in aqueous...

C - Chemistry – Metallurgy – 02 – F

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C02F 1/58 (2006.01) B01J 23/745 (2006.01) B01J 37/02 (2006.01) B01J 37/03 (2006.01) B09C 1/08 (2006.01) C02F 1/70 (2006.01) A62D 3/00 (2006.01)

Patent

CA 2228149

A method for dehalogenation of aqueous compositions contaminated with halogenated aliphatic and alicyclic hydrocarbons is provided which comprises contacting an aqueous composition with an amount of a mixed metal composition effective to dehalogenate the halogenated aliphatic and alicyclic hydrocarbons at a temperature of at least 10 ~C, wherein the mixed metal composition comprises a second metal selected from the group consisting of copper, cobalt, nickel, molybdenum, bismuth, tin, lead, silver, chromium, palladium, platinum and gold deposited on an anchor metal consisting essentially of iron metal and wherein the amount of second metal in the mixed metal composition is an amount effective to increase the dehalogenation rate compared to use of iron alone, and the surface of the mixed metal composition has exposed iron metal.

L'invention porte sur un procédé de déshalogénation de compositions aqueuses contaminées par des hydrocarbures aliphatiques et alicycliques, consistant à mettre en contact ladite composition avec une composition de plusieurs métaux capable d'effectuer ladite déshalogénation à une température d'au moins 10 ·C. La composition de métaux comprend un deuxième métal choisi parmi le cuivre, le cobalt, le nickel, le molybdène, le bismuth, l'étain, le plomb, l'argent, le chrome, le palladium, le platine et l'or, déposé sur un métal d'ancrage constitué essentiellement de fer, la quantité du deuxième métal à l'intérieur de la composition mixte étant suffisante pour accroître la vitesse de déshalogénation par rapport à l'utilisation de fer seul, et la surface de la composition métallique mixte présentant du fer exposé.

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