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:
Jun. 23, 2026
Filed:
Feb. 26, 2021
Kyoto University, Kyoto, JP;
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Haruo Kawamoto, Kyoto, JP;
Eiji Minami, Kyoto, JP;
Takashi Nomura, Kyoto, JP;
Hinano Mizuno, Kyoto, JP;
Kazuto Kobayashi, Tokyo, JP;
Akiko Miki, Tokyo, JP;
KYOTO UNIVERSITY, Kyoto, JP;
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Abstract
A method for producing sugar anhydride, comprising: (1) first heat treatment step of heating polysaccharide having reducing end group at 130-350° C. in the presence of C1-C10 alcohol compound free of an acetal structure; (2) second heat treatment step of heating the first heat treated polysaccharide for pyrolysis to form a gaseous sugar anhydride, the second heat treatment forming no char or only filmy char and forming no carbon monoxide or some carbon monoxide such that the amount of carbon monoxide formed is not more than 5 parts by weight per 100 parts by weight of the absolute dry weight of the polysaccharide; and (3) recovery step of cooling the gaseous sugar anhydride to a temperature not higher than the boiling point thereof. According to this method, sugar anhydride can be easily produced at a high yield.