Patent ID: 9527861
Filing Date: 2016-12-27
CPC Classification: C07C,C07D

Claim Text:
1. A method for producing anhydrosugar alcohol comprising the steps of: (1) converting hydrogenated sugar to anhydrosugar alcohol by dehydration reaction, (2) distilling the resulting liquid of the reaction of said step (1), (3) contacting the resulting distillate of said step (2) with active carbon having an average particle size of from 0.25 mm to 0.75 mm, (4) contacting the resulting product of said step (3) with cation ion exchange resin, and (5) contacting the resulting product of said step (4) with anion ion exchange resin, wherein the method does not comprise a further step of treating the resulting product of said step (5) with active carbon, and wherein the produced anhydrosugar alcohol has an ion content of 10 ppm or less, a conductivity of 10 μs/cm or less, a color index b value of 0.2 or less, and a yellow index (YI) value of 0.1 or less.