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AssigneeSK Innovation Co., Ltd.
InventorsYoung Bo Choi, Sung Real Son, In Hyoup Song, Sang Il Lee, Sang Hyun Cho, Dae Hyun Choo
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A method for producing anhydrosugar alcohol according to the present invention can increase the yield of anhydrosugar alcohol even in the absence of a catalyst or in the presence of a small amount of a transition metal salt catalyst by controlling the temperature of a high-temperature reaction, which converts sugar alcohol to anhydrosugar alcohol, in two steps, that is, a first low-temperature reaction step and a second high-temperature reaction step.
A method of preparing anhydrosugar alcohol in the absence of a catalyst, the method comprising subjecting an aqueous solution of sugar alcohol to a first reaction at a temperature of 240° C. to 285° C. followed by a second reaction at a temperature of 286° C. to 340° C.
A method of preparing anhydrosugar alcohol in the presence of a transition metal salt catalyst, the method comprising subjecting an aqueous solution of sugar alcohol to a first reaction at a temperature of 240° C. to 285° C. followed by a second reaction at a temperature of 300° C. to 340° C.
Dependencies are inferred from the claim text.