US 9,527,861 B2Granted

Production method for anhydro sugar alcohol having markedly reduced ion content and improved colour characteristics

AssigneeSamyang Corporation

InventorsYoung Jae Jung, Jin Kyung Kim, Do Hyun Kyung, Hoon Ryu

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Abstract

The present invention relates to a production method for an anhydro sugar alcohol having a markedly reduced ion content and improved color characteristics, and, more specifically, relates to a method for producing an anhydrous sugar alcohol having a markedly reduced ion content, markedly lowered electrical conductivity and improved color characteristics, which is obtained by subjecting hydrogenated sugar (sugar alcohol) to a dehydration reaction and thereby converting same to an anhydrous sugar alcohol and then subjecting distilled water, which has been isolated through a distillation step, to a decolorizing process using activated carbon, and subsequently bringing the resulting decolorized substance into contact with an ion exchange resin.

Claims9

Dependent claims

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.

4 more elements

Dependencies are inferred from the claim text.