Patent ID: 6414138
Filing Date: 2002-07-02
Classification: C07H

Abstract:
A process for crystallizing 1,1-GPM (1-0-&agr;-D-Glucopyranosyl-D-mannite) and/or 1,6-GPS (6-0-&agr;-D-Glucopyranosyl-D-sorbite), said process comprising:(i) dissolving hydrogenated isomaltulose or a mixture containing hydrogenated isomaltulose in water at an elevated temperature wherein said temperature is elevated such that said hydrogenated isomaltulose or mixture containing said hydrogenated isomaltulose is completely or almost completely dissolved in said water; and (ii) subjecting the dissolved solution produced in step (i) to one or more cooling steps within a temperature range of from about 90Â° C. to about 37Â° C. to produce distinct phases enriched in 1,1-GPM or 1,6-GPS, wherein said cooling step comprises (a) cooling from about 90Â° C. to about 65Â° C. at a rate of about 5 to about 15Â° C. per hour followed by (b) cooling from about 65Â° C. to about 37Â° C. at a rate of about 0.4 to about 3Â° C. per hour; wherein said cooling steps lead to phases of crystallization of 1,1-GPM and 1,6-GPS, wherein the crystalized solids obtained from the 1,1-GPM phase are coarse and uniform in grain size distribution so that said crystallized solids are easily separated, and wherein the process does not include seeding the solution.