Process for beta-lactone production

C - Chemistry – Metallurgy – 07 – D

Patent

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C07D 305/12 (2006.01)

Patent

CA 2757835

The present application provides a method for producing an beta-lactone product. The method includes the steps of. reacting an epoxide, a solvent with a carbonylation catalyst and carbon monoxide to produce a reaction stream comprising a beta-lactone then separating a portion of the beta-lactone in the reaction stream from the solvent and carbonylation catalyst to produce: i) a beta-lactone stream with the beta-lactone, and ii) a catalyst recycling stream including the carbonylation catalyst and the high boiling solvent; and adding the catalyst recycling stream to the feed stream.

La présente invention porte sur un procédé de production d'un produit bêta-lactone. Le procédé comprend les étapes consistant à : faire réagir un époxyde, un solvant avec un catalyseur de carbonylation et du monoxyde de carbone pour produire un courant réactionnel comprenant une bêta-lactone, puis séparer une partie de la bêta-lactone dans le courant réactionnel du solvant et du catalyseur de carbonylation pour produire : i) un courant de bêta-lactone avec la bêta-lactone et ii) un courant de recyclage de catalyseur comprenant le catalyseur de carbonylation et le solvant à point d'ébullition élevé; et ajouter le courant de recyclage de catalyseur au courant d'alimentation.

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