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:
Jan. 03, 2017
Filed:
Apr. 09, 2014
Toray Industries, Inc., Tokyo, JP;
Kenji Kawamura, Kamakura, JP;
Izumi Morita, Tokai, JP;
Masateru Ito, Kamakura, JP;
Satoshi Sakami, Kamakura, JP;
Masataka Makino, Nagoya, JP;
Katsushige Yamada, Kamakura, JP;
Mark J. Burk, San Diego, CA (US);
Michael Japs, San Diego, CA (US);
Warren Clark, San Diego, CA (US);
Toray Industries, Inc., , JP;
Abstract
A process produces 1,4-butanediol by purifying 1,4-butanediol originated from a fermentation broth, by which process 1,4-butanediol having properties suited as a material of producing a polyester is obtained, which 1,4-butanediol enables to reduce by-production of tetrahydrofuran during the esterification reaction and to reduce the delay in polymerization. The process of producing 1,4-butanediol includes adding an alkaline substance other than an ammonia or an amine to an aqueous 1,4-butanediol-containing solution originated from a fermentation broth; distilling the resulting mixture; and recovering a 1,4-butanediol-containing solution from the vapor flow.