Birch, Stewart, Kolasch & Birch, LLP
Method for preparing high purity anhydrosugar alcohols by thin film distillation
The present invention relates to a method for preparing high purity anhydrosugar alcohols using hydrogenated sugar, and more specifically, to a method for preparing high purity anhydrosugar alcohols (particularly, isosorbide, isomannide, isoidide, and the like) with a purity of 97.5% or higher (more preferably, 98.5% or higher) and a pH of a distillate of 3.7 or higher (more preferably, 4.0 or higher) in a distillation yield of 87% or higher (more preferably, 90% or higher) by adding an acid to hexitol so as to convert the same into anhydrosugar alcohols, and single-stage distilling the converted product by using an internal condenser type thin film evaporator.
SAMYANG GENEX CORPORATION
B C C B B B B
B01D C07C C07D B01D B01D B01D B01D
inventional inventional inventional inventional inventional inventional inventional
Hoon Jin Kyung Do Hyun Young Jae
Ryu Kim Kyung Jung