Method for preparing formylphosphonic acid

Details Method for preparing formylphosphonic acid Method for preparing formylphosphonic acid

2007-11-13

2007-11-13

O'Sullivan, Peter (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

C558S144000, C562S008000, C562S017000, C562S024000

Reexamination Certificate

active

11422256

ABSTRACT:
An improved process for the manufacture of formylphosphonic acid derivatives is reported. An aminomethylphosphonic acid substrate is contacted with 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 a formylphosphonic acid derivative and the conditions under which said contacting is carried out are controlled so that no more than 50% of the formylphosphonic acid derivative formed in the reaction product mixture is consumed by reaction with the reagent.

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