Method for preparing allulose crystals
A sequential crystallization process under reduced and atmospheric pressure conditions addresses the limitations of existing D-allulose crystal production, achieving large particle size, low hygroscopicity, and excellent flowability, suitable for commercial use.
WO2026127261A1PCT designated stage Publication Date: 2026-06-18DAESANG CORP
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- DAESANG CORP
- Filing Date
- 2025-07-29
- Publication Date
- 2026-06-18
Smart Images
Figure KR2025011318_18062026_PF_FP_ABST
Abstract
The present invention provides a method for preparing allulose crystals, comprising the steps of: (a) adding allulose seed crystals to an allulose-containing mother liquor and performing a primary crystallization reaction while a reduced pressure condition of 10-100 mb is maintained and under a temperature gradient condition in which the temperature of the allulose-containing mother liquor is gradually lowered; and (b) releasing the reduced pressure condition when the allulose crystal precipitation rate of the primary crystallization reaction has reached 12% or more, and performing a secondary crystallization reaction while the supersaturated state of the metastable zone is maintained and under a temperature gradient condition in which the temperature of a D-allulose-containing mother liquor is gradually lowered. Allulose crystal particles obtained using the method for preparing allulose crystals, of the present invention, have a large average particle size, are inhibited from caking even if stored for a long time and have low hygroscopicity and excellent flowability. In addition, when the method for preparing allulose crystals, of the present invention, is used, allulose crystallization yield can be improved.
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