Process for the preparation of epimer-free sugar alcohols...

Details Process for the preparation of epimer-free sugar alcohols... Process for the preparation of epimer-free sugar alcohols...

C - Chemistry, Metallurgy

07

C

260/233.4, 260/6

C07C 29/145 (2006.01) C07C 31/26 (2006.01) C07H 15/04 (2006.01)

Patent

CA 2027478

Process for the preparation of epimer-free sugar alcohols from the group consisting of xylitol, sorbitol (D-glucitol), 4-O-.beta.-D-galactopyranosyl-D-glucitol and 4-O-.alpha.-D-glucopyranosyl-D-sorbitol. These sugar alcohols can be prepared in epimer-free form from the corresponding sugars by catalytic hydrogenation in aqueous solution using hydrogen, the hydrogenation being carried out continuously at 100-500 bar of H2 and 60-125°C on a fixed bed of carrier-free mouldings composed of pressed powders of the elements of the iron group of the periodic table. The mouldings have a compressive strength of above 50 N and an internal surface of 10-90 m2/g.

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