The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 01, 2020
Filed:
Aug. 25, 2016
Applicant:
SK Innovation Co., Ltd., Seoul, KR;
Inventors:
In Hyoup Song, Daejeon, KR;
Tae Seung Kim, Yongin-si, KR;
Sung Real Son, Daejeon, KR;
Yoon Jae Yim, Sejong-si, KR;
Suk Joon Hong, Daejeon, KR;
Assignee:
SK Innovation Co., Ltd., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 493/04 (2006.01);
U.S. Cl.
CPC ...
C07D 493/04 (2013.01);
Abstract
The present invention provides a method for preparing anhydrosugar alcohol, in which the reaction temperature in a vacuum reaction that converts sugar alcohol into anhydrosugar alcohol is controlled to two steps of temperature that is, a first-step low reaction temperature of 100 to 150° C. and a second-step high reaction temperature of 151 to 240° C., so that the selectivity for the intermediate product 1,4-sorbitan can be increased, thereby increasing the yield of anhydrosugar alcohol.