Method for improving purity of sucralose

The invention relates to a method for improving purity of sucralose. An aqueous solution of the sucralose is extracted by an organic solvent, then extraction is performed by using another organic solvent, and after crystallization is performed, a crude product with purity of 99% is obtained. Through the method provided by the invention, a sucralose finished product with purity of 100% can be obtained, the yield can be improved while the quality of the product is guaranteed, and the sucralose finished product prepared by the method firstly occupies a sale market in increasingly fierce competition today. 本发明涉及种提高三氯蔗糖纯度的方法，将三氯蔗糖的水溶液经过种有机溶剂萃取之后，再用另种有机溶剂萃取，经过结晶之后得到纯度为99%的粗品。通过本发明可以得到纯度为100%的三氯蔗糖成品，可以保证在提高产品质量的同时提高产量，在竞争化日益激烈的今天首先占领销售市场。