A method for obtaining sucralose

By using fractional extraction and recrystallization techniques to extract sucralose from sucralose waste liquid, the problem of resource waste has been solved, and efficient resource utilization and the acquisition of high-purity products have been achieved.

CN117486950BActive Publication Date: 2026-07-10ANHUI JINHE INDUSTRIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ANHUI JINHE INDUSTRIAL CO LTD
Filing Date
2023-10-16
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In the existing technology, the tetrachlorosucrose resources in the butyl acetate distillation residue generated during the production of sucralose are not effectively utilized, resulting in resource waste.

Method used

Sucralose was extracted from sucralose waste liquid using a fractional extraction and fractional recrystallization method. By controlling the molar ratio and density difference between compound 1 and compound 2, and utilizing the separation characteristics of the aqueous and organic phases, compound 1 was gradually enriched and high-purity sucralose was obtained through crystallization.

Benefits of technology

This method enables the efficient recovery of sucralose from sucralose waste liquid, improving resource utilization, reducing waste, and obtaining high-purity sucralose products.

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Abstract

The application provides a method for obtaining sucralose, and relates to the technical field of chemical production, and comprises the following steps: (1) removing part of the solvent from a sucralose waste liquid by rotary evaporation, mixing with water, and then performing fractional extraction, and obtaining a concentrate and butyl acetate by rotary evaporation, and cooling the concentrate to crystallize to obtain a solid crude product and a mother liquor; (2) performing fractional recrystallization on the solid crude product to obtain a crystallization mother liquor and sucralose solid with a purity of 90-99%. The method can effectively recover sucralose from the sucralose waste liquid, and realizes the resource utilization of waste.
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