Process for the production of 1,2-propanediol

Details Process for the production of 1,2-propanediol Process for the production of 1,2-propanediol

C - Chemistry, Metallurgy

07

C

C07C 29/60 (2006.01) C07C 29/90 (2006.01) C07C 31/20 (2006.01)

Patent

CA 2708138

A process for the removal of hydroxypropane from a crude product stream from the hydrogenation of glycerol, the crude product stream comprising 1,2-propanediol and hydroxypropanone as impurity, the process comprising: (a) where required condensing the crude product stream; and (b) contacting the crude product phase in the liquid phase with a stream of a hydrogen-containing gas in the presence of a heterogeneous catalyst at suitable temperatures and pressures such that hydroxypropanone present in the crude product stream is converted to the desired propanediol.

L'invention concerne un procédé d'élimination d'hydroxypropane à partir d'un courant de produit brut issu de l'hydrogénation de glycérol, le courant de produit brut comprenant du 1,2-propanediol et de l'hydroxypropanone en tant qu'impureté. Selon l'invention, le procédé comprend : (a) si nécessaire la condensation du courant de produit brut; et (b) la mise en contact de la phase de produit brut dans la phase liquide avec un courant d'un gaz contenant de l'hydrogène en présence d'un catalyseur hétérogène à des températures et des pressions appropriées de manière à ce que l'hydroxypropanone présente dans le courant de produit brut soit transformée en propanediol souhaité.

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