Process for hydrogenation of sugars using a shell catalyst

Details Process for hydrogenation of sugars using a shell catalyst Process for hydrogenation of sugars using a shell catalyst

C - Chemistry, Metallurgy

07

H

C07H 15/04 (2006.01) C07C 29/136 (2006.01) C07C 29/145 (2006.01) C07C 31/18 (2006.01) C07H 3/00 (2006.01)

Patent

CA 2227319

The invention relates to a process for the hydrogenation of sugars and sugar mixtures to sugar alcohols or sugar alcohol mixtures wherein the sugars or sugar mixtures are hydrogenated with hydrogen in an aqueous solution at elevated temperature and elevated pressure by using a shell catalyst comprising a mixture of a pure Raney metal and a Raney metal alloy and wherein the shell catalyst has an essentially catalytically inactive core functioning as a carrier and a catalytically active shell.

L'invention porte sur une méthode d'hydrogénation de sucres et de mélanges de sucres en itols ou en mélanges d'itols. Les sucres ou mélanges de sucres sont hydrogénés à l'aide d'hydrogène en solution aqueuse, à température et pression élevées, en présence d'un catalyseur constitué d'un mélange de métal de Raney pur et d'un alliage métallique de Raney; le catalyseur comporte un noyau inactif, jouant le rôle de véhicule, entouré d'une enveloppe active comme catalyseur.

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