Process for oxidation of N-(phosphonomethyl)iminodiacetic acid or salt thereof

摘要

The invention relates to a process for the oxidation of N-(phosphonomethyl)iminodiacetic acid or a salt thereof to form N-(phosphonomethyl)glycine or a salt thereof, the process comprising contacting N-(phosphonomethyl) iminodiacetic acid or a salt thereof with an oxidizing agent in the presence of an oxidation catalyst, said oxidation catalyst comprising a carbon support having a transition metal composition comprising a transition metal and nitrogen thereon, wherein at least about 40% by weight of said transition metal is present in a non-zero oxidation state, the total Langmuir surface area of the oxidation catalyst is at least 1200 m 2 /g, and the micropore Langmuir surface area of the oxidation catalyst is from about 750 to about 1100 m 2 /g.