Process for preparing D-mannitol

Details Process for preparing D-mannitol Process for preparing D-mannitol

1976-12-13

1978-04-11

Evans, Joseph E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

195 31R, 260637R, 536 1, C07C 2900

Patent

active

040838811

ABSTRACT:
A D-glucose solution is added molybdic acid compound thereto and heated at a temperature of 110.degree.-160.degree. 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 perform enzymatic isomerizing reaction of D-glucose remaining in the epimerized mixture, thereby 46% based on the remaining D-glucose is converted into D-fructose. The epimerized mixture or 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.

REFERENCES:
patent: 2280975 (1942-04-01), Power
patent: 2642462 (1953-06-01), Kasehagen
patent: 2749371 (1956-06-01), Kasehagen
patent: 3329729 (1967-07-01), Brandner et al.
B.L.K et al, "Angew. Chem." International edition in English, vol. 10, July-Dec. 1971, p. 909.

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