METHOD FOR MANUFACTURING LACTULOSE ANHYDRIDE

摘要

The present invention provides a method for manufac- turing lactulose anhydride, which comprises drying lactulose trihydrate at a temperature within a range of from 45 to 75.degree.C and a degree of vacuum within a range of from 25 to 100 Torr to remove water of crystallization. The method of the present invention permits manufac- ture of lactulose anhydride through a simple process, at a high yield and at a low cost, and is therefore suitable for mass production of lactulose anhydride in an industrial scale.