Patent ID: 7741477

Claim:
A process for purification of substantially impure Sucralose of formula (I) to obtain sucralose having at least 99% purity, said process comprising steps of: (i) converting substantially impure Sucralose to its penultimate 4,1′,6′-trichloro-4,1′,6′-trideoxy galactosucrose penta-acetate (TOPSA) of formula (VI) by acetylation; wherein the step (i) acetylation is carried out in the presence of acetic anhydride, pyridine and dichloromethane; (ii) purifying the TOPSA obtained in above step (i); wherein the step (ii) purification is carried out as a single round of crystallization from methanol; and (iii) converting TOPSA obtained in above step (ii) to Sucralose by deacetylation.