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:
Sep. 01, 2020
Filed:
Sep. 07, 2016
Applicants:
Cathay Biotech Inc., Shanghai, CN;
Cibt America Inc., Newark, DE (US);
Inventors:
Assignees:
CATHAY BIOTECH INC., Shanghai, CN;
CIBT AMERICA INC., Newark, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 209/86 (2006.01); C12P 13/00 (2006.01); C07C 211/09 (2006.01); C07C 209/84 (2006.01); B01D 3/10 (2006.01); B01D 11/04 (2006.01);
U.S. Cl.
CPC ...
C07C 209/86 (2013.01); B01D 3/10 (2013.01); B01D 11/0492 (2013.01); C07C 209/84 (2013.01); C07C 211/09 (2013.01); C12P 13/00 (2013.01);
Abstract
Provided is a method for extracting a 1,5-pentanediamine from a solution system containing a 1,5-pentanediamine salt. The method comprises adding to the solution system an insoluble basic substance to form a solution system containing free 1,5-pentanediamine. The provided method has high applicability, is easy to use, and is environmentally-friendly, significantly lowering raw material costs and operating costs for the entire manufacturing process. The method achieves a high recovery rate for pentanediamine, and is more suitable for industrial-scale production.