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:
Aug. 23, 2022
Filed:
Oct. 04, 2019
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Assignee:
LG Chem, Ltd., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/48 (2006.01); B01D 11/04 (2006.01); B01D 3/10 (2006.01); C12P 7/42 (2006.01);
U.S. Cl.
CPC ...
C07C 51/48 (2013.01); B01D 3/10 (2013.01); B01D 11/0484 (2013.01); B01D 11/0488 (2013.01); B01D 11/0492 (2013.01); C12P 7/42 (2013.01);
Abstract
Provided is a method for purifying organic acids, including: a first extraction which includes separating an aqueous solution of organic acids into a first organic layer and a first aqueous solution layer by adding a solvent containing an amine and an alcohol; removing the alcohol from the separated first organic layer; and a second extraction which includes separating the first organic layer from which the alcohol has been removed into a second organic layer and a second aqueous solution layer by adding water.