Improvement to methods for the continuous production of...

C - Chemistry – Metallurgy – 07 – C

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C07C 51/12 (2006.01) C07C 53/08 (2006.01) C07C 67/36 (2006.01) C07C 67/37 (2006.01) C07C 69/14 (2006.01)

Patent

CA 2452258

The invention relates to a method for the continuous preparation of acetic acid and/or methyl acetate by carbonylation using carbon monoxide, methanol or a methanol derivative that can be carbonylated, in liquid phase, in the presence of water and a catalytic system. According to the invention, in order to improve the production of acetic acid and/or methyl acetate, the temperature of the reactor and the inlet flow of methanol, or the methanol derivative that can be carbonylated, into said reactor are controlled by the inlet flow of carbon monoxide and by at least one of the parameters that define the composition of the reaction medium and/or events, said automatic control being performed preferably by means of a predictive multi-variable regulator. The inventive method is suitable for use in Monsanto-type preparation methods and low water content methods.

L'invention concerne un procédé de préparation en continu par carbonylation par du monoxyde de carbone, du méthanol ou d'un dérivé carbonylable du méthanol, en phase liquide, en présence d'eau et d'un système catalytique selon lequel, en vue d'améliorer la production d'acide acétique et/ou d'acétate de méthyle, on asservit, de préférence par l'intermédiaire d'un régulateur multivariable prédictif, la température du réacteur et le débit d'entrée du méthanol ou du dérivé carbonylable dans ledit réacteur au débit d'entrée de monoxyde de carbone et à au moins un des paramètres définissant la composition du milieu réactionnel et/ou des évents. Le procédé ci-dessus trouve son application aussi bien dans les procédés de préparation de type Monsanto que basse teneur en eau.

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