Method for the production of dioxolane

Details Method for the production of dioxolane Method for the production of dioxolane

C - Chemistry, Metallurgy

07

D

C07D 317/12 (2006.01)

Patent

CA 2623594

Disclosed is a method for producing dioxolane by reacting ethylene glycol (1) with formaldehyde in aqueous solution (2) in the presence of catalysts. Said method is characterized in that the reaction is carried out in a reactive distillation column (RDK). The educts ethylene glycol (1) and aqueous formaldehyde (2) are fed to the reactive distillation column (RDK) in the central zone thereof, and a flow (3) containing dioxolane is withdrawn from the top zone of the reactive distillation column (RDK) while a bottom flow (4) containing components that are high-boiling compared to dioxolane is withdrawn.

L'invention concerne un procédé de production de dioxolane par conversion d'éthylèneglycol (1) par un formaldéhyde en solution aqueuse (2) en présence de catalyseurs. L'invention est caractérisée en ce que la conversion est effectuée dans une colonne de distillation réactive (RDK). Les éduits éthylèneglycol (1) et solution de formaldéhyde aqueuse (2) de la colonne de distillation réactive (RDK) sont cédés dans la zone centrale de cette dernière. Un flux (3) contenant du dioxolane est soutiré de la zone supérieure de la colonne de distillation réactive (RDK) ainsi qu'un courant de fond (4) contenant des composantes à ébullition plus difficile que le dioxolane.

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