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:
May. 31, 2005
Filed:
Feb. 02, 2001
Applicants:
Yasuo Tsuji, Ohtake, JP;
Hiroaki Uenakai, Kakogawa, JP;
Hiroshi Koyama, Hidaka, JP;
Inventors:
Assignee:
Daicel Chemical Industries, Ltd., Sakai, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C031/18 ; C07C031/20 ;
U.S. Cl.
CPC ...
Abstract
A method is provided for the preparation of high-purity 1,3-butylene glycol from acetaldehyde. In the method, acetaldehyde is condensed in the presence of base to form a mixture of acetaldols, and the acetaldols are then converted to 1,3-butylene glycol by hydrogenation. Chemical treatment and distillation processes are described which provide 1,3-butylene glycol of very high purity.