Patent ID: 8192775
Filing Date: 2012-06-05
Classification: A21D,A23G,A23L,A61P,C07C

Abstract:
1. A process for the microcrystallizatin of polyols into a polyol composition consisting essentially of two or three polyols, which are: xylitol and lactitol; xylitol and maltitol; maltitol and lactitol; or xylitol, lactitol and maltitol, the process comprising the steps of: a) spraying a liquid feed of at least two dissolved polyols containing at least 30% by weight of each of the at least two of polyols which are selected from the group consisting of xylitol, lactitol and maltitol, at the dry solids concentration of 60- 90% into contact with a gas suspended dry feed of small crystals containing the same polyols so as to wet the surface of said dry feed particles with said liquid feed, wherein the ratio of liquid feed to dry feed is between 2:1 and 1:4; b) evaporating the solvent of said liquid feed causing microcrystallization of said dissolved polyols on said dry feed particles and drying in the gas suspended state to a free moisture content of 0.5- 3%; and c) conditioning the microcrystallized particles at a temperature of 40- 90° C. to provide a solid randomly agglomerated microcrystalline polyol composition with microcrystals 5-10 micrometers in size, and a free moisture content below 1%, wherein the ratio of polyols in said feeds being such that the resulting microcrystalline mixture contains 30% or more of each of the at least two of polyols microcrystallized together into a solid microcrystalline product comprised of at least two polyols; d) optionally milling the dried randomly agglomerated microcrystalline polyol composition from step c) to a mean particle size of 0.1- 0.4 mm.