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公开(公告)号：US20240327445A1
公开(公告)日：2024-10-03
申请号：US18250957
申请日：2020-11-27
发明人： Chuanjiu Xu , Chenggang Xu , Yongle Chen
摘要： Provided is a method for purifying sucralose-6-acetate, including: preparation: providing a saturated solution of crude sucralose-6-acetate in ethyl acetate that is heated to a predetermined temperature; gradient crystallization: subjecting the saturated solution to multiple cooling crystallization and filtration, and collecting crude sucralose-6-acetate obtained after the multiple cooling crystallization and filtration, where during each cooling crystallization process, a low-polarity solvent is added dropwise to the saturated solution to reduce a polarity of the saturated solution during crystallization step by step; and purification: subjecting a collected crude sucralose-6-acetate to recrystallization for purification by using a mixed solution of ethyl acetate and the low-polarity solvent to obtain fine sucralose-6-acetate of high purity.
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