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:
Oct. 22, 2019
Filed:
May. 04, 2016
Applicant:
Cj Cheiljedang Corporation, Seoul, KR;
Inventors:
Won Sik Gwak, Yongin-si, KR;
Hong Xian Li, Seoul, KR;
Hyun Ju Won, Pohang-si, KR;
Hyo Hyoung Lee, Incheon, KR;
Kyung Su Na, Gimpo-si, KR;
Su Jin Park, Seoul, KR;
Young Lyeol Yang, Seoul, KR;
Hye Won Um, Suwon-si, KR;
Chang Yub Oh, Yongin-si, KR;
Kyoung Min Lee, Seoul, KR;
Assignee:
CJ CHEILJEDANG CORPORATION, Jung-Gu, Seoul, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 209/86 (2006.01); C07C 211/09 (2006.01); B01D 3/14 (2006.01); C07C 209/84 (2006.01); C12P 13/00 (2006.01);
U.S. Cl.
CPC ...
C07C 209/86 (2013.01); B01D 3/14 (2013.01); C07C 209/84 (2013.01); C07C 211/09 (2013.01); C12P 13/001 (2013.01);
Abstract
A method for purifying 1,4-diaminobutane comprising the steps of: separating a second composition including carbonate salt of 1,4-diaminobutane from a first composition including carbonate salt of 1,4-diaminobutane by distillation; and removing carbonate from carbonate salt of 1,4-diaminobutane included in the second composition to recover 1,4-diaminobutane.