Synthesis process of polyol carbonate from polyols,...

C - Chemistry – Metallurgy – 07 – D

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C07D 317/36 (2006.01)

Patent

CA 2737398

The present invention relates to a synthesis process of polyol carbonate, such as glycerol carbonate, from polyols such as glycerol, propylene glycol or ethylene glycol and urea conducted in using a solvent selective for polyols (glycerol) carbonates. Said process comprises reacting polyol with urea in the presence of a catalyst, extracting produced NH3 and in addition in the presence in the course of at least one step of the process of a selective solvent for polyol carbonate allowing to extract it from the reaction medium.

La présente invention concerne un procédé permettant de réaliser la synthèse d'un carbonate de polyol tel que le carbonate de glycérol, à partir de polyols tels que le glycérol, le propylène glycol ou l'éthylène glycol et l'urée, avec utilisation d'un solvant sélectif pour les carbonates de polyols (glycérol). Ce procédé consiste à faire réagir le polyol avec l'urée en présence d'un catalyseur, à extraire le NH3 produit, et en plus, pendant l'une au moins des étapes du procédé, en présence d'un solvant sélectif pour le carbonate de polyol de façon à permettre de réaliser l'extraction du milieu de réaction.

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