Continuous process for the preparation of acetic anhydride...

Details Continuous process for the preparation of acetic anhydride... Continuous process for the preparation of acetic anhydride...

C - Chemistry, Metallurgy

07

C

C07C 53/12 (2006.01) C07C 51/12 (2006.01) C07C 51/56 (2006.01)

Patent

CA 2097494

Disclosed is a continuous process for the preparation of acetic anhydride which comprises carbonylating a mixture comprising (i) methyl iodide and (ii) methyl acetate and/or dimethyl ether in the presence of a rhodium catalyst and a promoter wherein the concentration of mesityl oxide in the carbonylation mixture is suppressed by the presence therein of at least 100 ppm of dissolved ferrous and/or cobaltous ion.

Procédé en continu pour la préparation d'anhydride acétique, par carbonylation d'un mélange renfermant (i) de l'iodure de méthyle et (ii) de l'acétate de méthyle et (ou) de l'oxyde de diméthyle, en présence d'un catalyseur au rhodium et d'un activateur, la concentration d'oxyde de mésityle dans le mélange de carbonylation étant supprimée par la présence d'au moins 100 ppm d'ion ferreux et (ou) cobalteux dissous.

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