Method for preparing formylphosphonic acid
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United States of America Patent
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Jul 13, 2004
Grant Date -
Jun 19, 2003
app pub date -
Sep 4, 2002
filing date -
May 5, 1997
priority date (Note) -
Expired
status (Latency Note)
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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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