Membrane separation method for separating high boiler during...

C - Chemistry – Metallurgy – 07 – D

Patent

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C07D 317/38 (2006.01)

Patent

CA 2715313

The present invention relates to a process for the continuous preparation of a 1,3-dioxolan-2-one wherein a discharge from the reaction zone is subjected to a fractionation by means of a semipermeable membrane in order to separate off polymeric by-products.

La présente invention concerne un procédé de production continue d'une 1,3-dioxolan-2-one représentée par la formule (I), dans laquelle R1 représente un atome d'hydrogène ou un groupe organique comportant 1 à 40 atomes de carbone et R2 et R3 représentent indépendamment un atome d'hydrogène ou un groupe alkyle C1-C4, R2 et R3 pouvant aussi être liés l'un à l'autre pour former un cycle à cinq ou six membres. Ce procédé consiste à soumettre des matières provenant de la zone de réaction à une séparation au moyen d'une membrane semi-perméable afin de séparer les sous-produits polymères.

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