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:
Apr. 30, 2024
Filed:
Sep. 27, 2019
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Assignee:
LG CHEM, LTD., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 207/267 (2006.01); B01D 3/14 (2006.01); B01D 3/40 (2006.01); C08G 75/0259 (2016.01); C08G 75/0281 (2016.01);
U.S. Cl.
CPC ...
C07D 207/267 (2013.01); B01D 3/141 (2013.01); B01D 3/40 (2013.01); C08G 75/0259 (2013.01); C08G 75/0281 (2013.01);
Abstract
There is provided a method and an apparatus for efficiently recovering an amide-based compound such as N-methyl-2-pyrrolidone from an aqueous solution containing an amide-based compound such as N-methyl-2-pyrrolidone.