Process for preparing triallyl cyanurate

C - Chemistry – Metallurgy – 07 – D

Patent

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C07D 251/34 (2006.01)

Patent

CA 2657173

The invention relates to an improved process for preparing triallyl cyanurate (TAC) by reacting cyanuric chloride with allyl alcohol in the presence of an alkali metal acid acceptor and in the absence of an organic solvent other than allyl alcohol. According to the invention, TAC is obtained in over 99% purity with an APHA colour number below 10 in a yield of over 90% when 3.9 to 6.0 mol of allyl alcohol and 3.0 to 3.2 equivalents of acid acceptor are used per mole of cyanuric chloride, cyanuric chloride and acid acceptor are added simultaneously or successively to anhydrous or at least 50% by weight aqueous allyl alcohol, and the reaction is performed in one or more stages at a temperature in the range of -5 to +50°C.

L'invention concerne un procédé amélioré de préparation de cyanurate de triallyle (TAC), consistance à faire réagir du chlorure cyanurique avec de l'alcool allylique en présence d'un accepteur d'acide à base de métal alcalin et en l'absence d'un solvant organique autre que l'alcool allylique. Selon l'invention, le cyanurate de triallyle est obtenu avec une pureté supérieure à 99% avec un indice de couleur APHA inférieure à 10 et un rendement supérieur à 90% lorsque 3,9 à 6,0 mol d'alcool allylique et 3,0 à 3,2 équivalents d'accepteur d'acide sont utilisés par mole de chlorure cyanurique, le chlorure cyanurique et l'accepteur d'acide étant ajoutés simultanément ou successivement à un alcool allylique anhydre ou contenant au moins 50% en poids d'eau et la réaction étant produite en une ou plusieurs étapes à une température comprise entre -5 et +50°C.

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