Process for preparing 1,3-alkanediols and 3-hydroxyaldehydes

C - Chemistry – Metallurgy – 07 – C

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C07C 31/20 (2006.01) C07C 29/141 (2006.01) C07C 45/58 (2006.01) C07C 45/80 (2006.01) C07C 47/19 (2006.01)

Patent

CA 2201323

A process for preparing 1,3-alkanediols and 3-hydroxyaldehydes by hydroformylating an oxirane with carbon monoxide and hydrogen in the presence of one or more Group VIII metal-based hydroformylation catalysts, which may contain up to 50 mole % based on the metal of phosphine-modified catalysts, wherein the concentration of the oxirane at the start of the reaction is less than 15 wt.% based on the weight of the total liquid reaction mixture. The process enables the production of 1,3-propanediol in high yields and selectivity.

Procédé de préparation de 1,3-alcanediols et de 3-hydroxyaldéhydes par hydroformylation d'un oxyrane avec du monoxyde de carbone et de l'hydrogène, en présence d'un ou de plusieurs catalyseurs d'hydroformylation à base de métaux du groupe VIII, lesquels catalyseurs peuvent contenir jusqu'à 50 mol %, calculés sur la base du métal, de catalyseurs modifiés par phosphine, la concentration de l'oxyrane au démarrage de la réaction étant inférieure à 15 pourcent en poids calculés sur la base du poids du mélange de réaction liquide total. Ce procédé permet de produire du 1,3-propanediol avec des rendements et une sélectivité élevés.

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