Patent ID: 6217779
Filing Date: 2001-04-17
Classification: A62D,B01J,B09C,C02F,Y10S

Abstract:
A method for dehalogenation of aqueous compositions contaminated with halogenated aliphatic and alicyclic hydrocarbons comprising:(a) contacting an anchor metal consisting essentially of iron metal with a nonaqueous electroless plating solution comprising a soluble metal halide salt complex and a suitable solvent for a time sufficient to deposit metal derived from the soluble metal halide salt on the anchor metal to produce a mixed metal composition wherein the amount of metal derived from the soluble metal halide salt 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, and wherein the metal in the soluble salt is cobalt, copper, nickel, bismuth or lead,(b) recovering the mixed metal composition, and(c) contacting said aqueous composition with an amount of said mixed metal composition effective to dehalogenate said halogenated aliphatic and alicyclic hydrocarbons at a temperature of at least 10.degree. C.