Method for preparing formylphosphonic acid

Details Method for preparing formylphosphonic acid Method for preparing formylphosphonic acid

C - Chemistry, Metallurgy

07

F

C07F 9/38 (2006.01)

Patent

CA 2287248

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.

L'invention porte sur un procédé amélioré de fabrication de dérivés de l'acide formylphosphonique consistant à mettre en contact un substrat d'acide aminométhylphosphonique avec un réactif choisi parmi de l'eau, un alcool, un composé phénolique, ou un de leurs mélanges et avec un gaz oxydant en présence d'un catalyseur, de manière à former un mélange de produits de réaction contenant un dérivé de l'acide formylphosphonique. Les conditions dans lesquelles s'effectue la mise en contact sont contrôlées de manière à ce que 50 % au plus du dérivé de l'acide formylphosphonique ainsi formé soit consommé par réaction avec le réactif.

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