PREPARATION METHOD FOR SUCRALOSE REFINED PRODUCT

WIPO Patent Application WO/2024/082175

A1

The present invention provides a preparation method for a sucralose refined product, and relates to the technical field of fine chemical engineering. In the present invention, by means of subjecting a sucralose crude product to ethyl acetate pulping treatment, two instances of activated carbon decolorization and impurity removal at different stages and three instances of crystallization, impurities in the sucralose crude product and impurities generated by oxidation during a crystallization mother liquor use process can be effectively removed, and the problem of impurity enrichment during the recycling process of a crystallization mother liquor is solved, such that crystallization mother liquor generated during the refining process can be recycled, the loss of sucralose during the purification process is reduced, and the yield of sucralose is significantly improved. Furthermore, the preparation method for a sucralose refined product provided in the present invention can be effectively combined with a preparation method for a sucralose crude product, such that the mother liquor formed during the preparation process of the sucralose refined product can be recycled, the yield of sucralose is significantly increased, the production cost is significantly reduced, and the preparation method has relatively good industrial prospects.

CHEN YONGLE (CN)
SHEN DONGDONG (CN)
CHEN YUHAN (CN)
XIAO SHIDONG (CN)

PCT/CN2022/126183

April 25, 2024

October 19, 2022

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ANHUI JINHE IND CO LTD (CN)

C07H5/02; C07H1/06

BEIJING GAOWO LAW FIRM (CN)

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