Monsanto Company

Astaris LLC

David E McKenzie

David A Morgenstern

Kam-To Wan

Sa V Ho

Robert W Orth

John M Dzenitis

Cindy Ludwig

Robert G Orth

David Oburn

This invention is directed to an improved process for the preparation of N-(phosphonomethyl)glycine (i.e., &ldquo;glyphosate&rdquo;), a salt of N-(phosphonomethyl)glycine, or an ester of N-(phosphonomethyl)glycine. The process comprises combining an N-substituted N-(phosphonomethyl)glycine reactant with oxygen in the presence of a noble metal catalyst. The N-substituted N-(phosphonomethyl)glycine reactant has formula (V):

Process for the preparation of N-(phosphonomethyl)glycine by oxidizing N-substituted N-(phosphonomethyl)glycine

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&deg; 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.

Dehalogenation of halogenated hydrocarbons in aqueous compositions

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House Springs, MO, United States of America

David E McKenzie