Method for preparing formylphosphonic acid

Details Method for preparing formylphosphonic acid Method for preparing formylphosphonic acid

2006-08-15

2006-08-15

Richter, Johann (Department: 1621)

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

Organic compounds

Phosphorus acids or salts thereof

C562S008000, C562S017000, C558S137000, C558S144000

Reexamination Certificate

active

07091376

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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CA:91:193420 abs of SU684038.

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