Improved process for continuously preparing alkyl (meth)...

Details Improved process for continuously preparing alkyl (meth)... Improved process for continuously preparing alkyl (meth)...

C - Chemistry, Metallurgy

07

C

C07C 67/03 (2006.01) B01J 21/06 (2006.01) C07C 69/54 (2006.01)

Patent

CA 2512628

The invention relates to an improved method for the continuous production of alkyl(methyl)acrylates by transesterification of methyl(meth)acrylate with alcohols that are heavy in comparison with methanol. A special processing technique makes it possible to obtain new levels of product quality. Very high space-time-overall yields can also be obtained. The invention is characterized by the multiple use of a homogeneous catalyst which thereby reduces the costs of auxiliary agents significantly.

L'invention concerne une amélioration apportée à un procédé de production en continu d'alkyl(méth)acrylates par transestérification de méthyl(méth)acrylate avec des alcools à point ébullition élevé par rapport au méthanol. Grâce à une technique de traitement particulière, il est possible d'obtenir des qualités de produit inconnues jusqu'alors. En outre, il est possible d'obtenir des rendements globaux et des rendements espace-temps très élevés. Ce procédé est caractérisé en ce qu'il permet d'utiliser plusieurs fois le catalyseur homogène employé et de réduire considérablement le coût des auxiliaires.

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