Method for the production of sorbit by hydrogenation of...

B - Operations – Transporting – 01 – J

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B01J 23/46 (2006.01) B01J 37/18 (2006.01) C07C 29/141 (2006.01) C07C 31/26 (2006.01) B01J 21/08 (2006.01) B01J 35/10 (2006.01)

Patent

CA 2449522

The invention relates to a method for the production of sorbit by catalytic hydrogenation of a monosaccharide forming sorbit during said hydrogenation in a liquid phase, characterized in that the catalyst is obtained by 1) single or multiple treatment of an amorphous silicon dioxide based carrier material with a halogen-free aqueous solution of a low-molecular ruthenium compound and subsequent drying of the treated carrier material at a temperature of less than 200~ C, ii) reduction of the solid obtained in I) with hydrogen at a temperature ranging from 100 to 350~ C, wherein step ii) is carried out directly after step i).

La présente invention concerne un procédé de fabrication de sorbitol par hydrogénation catalytique d'un monosaccharide formant du sorbitol lors de l'hydrogénation, en phase liquide. Le procédé selon l'invention est caractérisé en ce que le catalyseur peut être obtenu par I) traitement simple ou multiple d'un matériau support à base de dioxyde de silicium amorphe avec une solution aqueuse non halogénée d'un composé ruthénium de faible masse moléculaire, et séchage consécutif du matériau support traité à une température inférieure à 200 ·C, et II) réduction du solide obtenu en I) avec de l'hydrogène à une température de 100 à 350 ·C, l'étape II) étant effectuée directement après l'étape I).

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