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US 2019/0241581 A1Published application
Method for Producing Anhydrosugar Alcohol by High-Pressure Reaction
AssigneeSK Innovation Co., Ltd.
InventorsYoung Bo Choi, Sang Il Lee, Sung Real Son, In Hyoup Song
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Abstract
The present invention relates to a method of producing anhydrosugar alcohol by dehydrating sugar alcohol at high pressure in the presence of a catalyst which is less acidic than a conventional sulfuric acid catalyst and which can suppress side reactions at high temperature. According to the present invention, anhydrosugar alcohol can be produced in a yield similar to that in a vacuum reaction.
Claims7
A method of preparing anhydrosugar alcohol, the method comprises:
- dehydrating a sugar alcohol at a pressure of 10 bar to 50 bar in a presence of a catalyst having:
- (a) a boiling point of 160° C. or higher at 10 mmHg;
- (b) an acidity of −3.0<pKa<1.9;
- and
- (c) reacting in a homogeneous phase,
- wherein the catalyst is at least one selected from the group consisting of naphthalenesulfonic acid, methansulfonic acid and p-tolunesulfonic acid.
3 more elements
Dependencies are inferred from the claim text.