Patent ID: 6218570
Filing Date: 2001-04-17
Classification: C07F

Abstract:
A method for making formylphosphonic acid or a derivative thereof, the method comprising:contacting an aminomethylphosphonic acid substrate, a reagent selected from the group consisting of water, an alcohol, a phenol compound, and mixtures thereof, and an oxidizing gas in the presence of a catalyst to form a reaction product mixture containing formylphosphonic acid or a derivative thereof, andcontrolling the conditions under which said contacting is conducted so that (a) at least about 75% of the aminomethylphosphonic acid substrate is converted to the formylphosphonic acid or said derivative thereof, and (b) the molar ratio of formylphosphonic acid or said derivative thereof to any formic acid byproduct is at least about 2:1 in said reaction product mixture.