Patent ID: 6943248
Filing Date: 2005-09-13
Classification: C07H

Abstract:
1. A method of producing stable sucralose crystals from a sucralose solution, the method comprising: introducing a feed stream of sucralose solution into a system comprising a crystallization vessel, a heat exchanger, and a pump configured to recirculate the sucralose solution out of and back into the crystallizer vessel and through the heat exchanger; causing sucralose crystals to form continuously in the system; removing an output stream of sucralose solution including sucralose crystals from the system; and continuously recirculating a part of the output stream including sucralose crystals to the crystallization vessel, and separating sucralose crystals from the remaining part of the output stream; wherein the rates of introducing, removing, and recirculating are controlled so that sucralose passing through the system has, on average, a residence time in the system of at least four hours; and drying the separated sucralose crystals at a drying temperature of about 85° F. or below.