Process for the production of alkenyl carboxylates

C - Chemistry – Metallurgy – 07 – C

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C07C 67/05 (2006.01) C07C 67/055 (2006.01) C07C 69/007 (2006.01)

Patent

CA 2497802

The present invention provides a process for the production of an alkenyl carboxylate by reacting an alkene, a carboxylic acid and a molecular oxygen- containing gas in a reaction zone in the presence of a catalyst at an elevated reaction temperature, T, to produce an outlet stream from the reaction zone comprising alkenyl carboxylate and oxygen, and wherein in said process the catalyst is contacted with the alkene, at a partial pressure, P, optionally in the presence of the carboxylic acid, and the outlet stream comprises less than 2vo1 % oxygen, the improvement comprises reducing the partial pressure of the alkene and/or reducing the reaction temperature so as to suppress formation of benzene and/or suppress inhibition of the catalyst.

L'invention concerne un procédé de production de carboxylate d'alcényle par réaction d'un alcène, d'un acide carboxylique et d'un gaz contenant de l'oxygène moléculaire dans une zone de réaction en présence d'un catalyseur à une température de réaction T élevée, afin d'obtenir un effluent en provenance de la zone de réaction qui comprend du carboxylate d'alcényle et de l'oxygène. Selon ce procédé, le catalyseur est mis en contact avec l'alcène à un pression partielle P, éventuellement en présence de l'acide carboxylique, et l'effluent comprend moins de 2% en volume d'oxygène, l'amélioration consistant à réduire la pression partielle de l'alcène et/ou à réduire la température de réaction afin de supprimer la formation de benzène et/ou de supprimer l'inhibition du catalyseur.

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