反应详情

According to a preferable embodiment of the present invention, after converting hexitol as the hydrogenated sugar to anhydrosugar alcohol, the two-stage distillation of the resulting liquid of the converting step in the order of wiped-film distillation; and short-path distillation can provide highly pure anhydrosugar alcohol having purity of 98% or higher, a content of sorbitol and sorbitan isomer as impurities of less than 0.1% (more preferably, less than 0.05%) and improved color of pale yellow, with a distillation yield of 94% or higher (more preferably, 95% or higher), and subsequently conducting crystallization, decolorization by adsorbent and ion purification procedures, etc. can provide white isosorbide.

1. distillationwith a distillation yield of 94%
2. customcrystallization, decolorization by adsorbent and
3. customion purification procedures, etc.