Title:
MANUFACTURE OF L-SACCHAROSES AND D-FRUCTOSES
Document Type and Number:
Japanese Patent JPS5839696
Kind Code:
A
Abstract:
A method for producing L-sugars including L-idose and L-gulose as well as D-fructose from D-glucose. The method comprises epimerizing D-glucose to a mixture of D-glucose and D-mannose, hydrogenating the mixture in a fixed catalyst bed to provide D-sorbitol and D-mannitol, separating the D-mannitol by fractional crystallization, oxydizing separately the D-sorbitol and D-mannitol to provide L-sorbose and D-fructose, respectively; and racemizing the L-sorbose in a weak alkaline solution to provide a mixture of L-sorbose, L-idose and L-gulose, and precipitating the remaining L-sorbose with a dilute lime solution. The unconverted L-sorbose is recovered and recycled.
Inventors:
DAAKU SEODOORU ADORIAAN HIYUIB
Application Number:
JP14352082A
Publication Date:
March 08, 1983
Filing Date:
August 20, 1982
Export Citation:
Assignee:
HYDROCARBON RESEARCH INC
International Classes:
C07H3/02; C12P19/02; C13K11/00; (IPC1-7): C07H3/02
Attorney, Agent or Firm:
Akihide Sugimura