Method for producing d-allulose crystals

Abstract

Provided is a method for producing D-allulose crystals, comprising the steps of adding D-allulose seed crystals to a D-allulose-containing stock solution, and then carrying out a crystallization reaction under a temperature gradient in which the temperature of the D-allulose-containing stock solution is reduced from an initial temperature Ti to a final temperature Tf. In the method for producing D-allulose crystals according to the present disclosure, the temperature gradient includes a temperature condition corresponding to the supersaturation state of a metastable zone, and the crystallization reaction is carried out under a reduced pressure condition of 10~100 millibars (mb). Most D-allulose crystal particles produced by the method of the present disclosure have a cubic crystal structure, and the particle size distribution of the crystal particles is uniform, resulting in good flowability. In addition, when D-allulose crystals are produced by the method of the present disclosure, the crystallization yield can be remarkably improved.

Dependencies are inferred from the claim text.