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:
Mar. 10, 2020
Filed:
Oct. 12, 2012
Applicant:
Toray Industries, Inc., Tokyo, JP;
Inventors:
Kenji Kawamura, Kamakura, JP;
Izumi Morita, Tokai, JP;
Masateru Ito, Kamakura, JP;
Kyohei Isobe, Kamakura, JP;
Satoshi Sakami, Kamakura, JP;
Katsushige Yamada, Kamakura, JP;
Assignee:
Toray Industries, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 29/76 (2006.01); C07C 29/80 (2006.01); B01D 59/30 (2006.01); C07C 31/20 (2006.01); C12P 7/18 (2006.01); C12P 7/16 (2006.01);
U.S. Cl.
CPC ...
C07C 29/80 (2013.01); C07C 29/76 (2013.01); C12P 7/16 (2013.01); C12P 7/18 (2013.01); B01D 59/30 (2013.01); C07C 31/207 (2013.01); Y02E 50/10 (2013.01);
Abstract
A method of producing 2,3-butanediol includes subjecting a 2,3-butanediol culture liquid produced by microbial fermentation to nanofiltration membrane treatment and ion-exchange treatment (Step A), and then adding an alkaline substance and performing distillation (Step B).