Process for preparing mannitol

Details Process for preparing mannitol Process for preparing mannitol

C - Chemistry, Metallurgy

12

P

195/129

C12P 7/02 (2006.01) C07C 31/26 (2006.01) C07H 3/02 (2006.01)

Patent

CA 1085327

PROCESS FOR PREPARING D-MANNITOL ABSTRACT A D-glucose solution is added molybdic acid compound thereto and heated at a temperature of 110 - 160 °C with pH 2.0 - 4.5 to perform epimerizing reaction of D-glucose, and thereby 30- 36 °%, based on the D-glucose, of D-mannose is formed. To the epimerized mixture thus obtained is further added glucose-isomerase to per- form enzymatic isomerizing reaction of D-glucose remaining in the epimerized mixture, and thereby 46% based on the remaining D- glucose is converted into D-fructose. The enzymatically isomerized mixture is subjected to catalytic hydrogenation under high pressure, and thereby is produced D-mannitol at high yield based on the initial D-glucose.

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