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:
Feb. 10, 2026
Filed:
Jun. 16, 2022
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Byeong Gil Lyu, Daejeon, KR;
Mi Kyung Kim, Daejeon, KR;
Eun Kyo Kim, Daejeon, KR;
Hye Bin Kim, Daejeon, KR;
Assignee:
LG CHEM, LTD., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/487 (2006.01); C07C 51/377 (2006.01); C07C 51/48 (2006.01);
U.S. Cl.
CPC ...
C07C 51/487 (2013.01); C07C 51/377 (2013.01); C07C 51/48 (2013.01);
Abstract
Provided is a method for preparing an acrylic acid including: dehydrating a lactic acid aqueous solution in a reaction unit to prepare a reaction product stream; passing the reaction product stream through a cooling unit and a refining unit sequentially and supplying a discharge stream from the refining unit to an acrylic acid separation column; and separating an unreacted lactic acid as a side discharge stream and separating the acrylic acid as an upper discharge stream in the acrylic acid separation column.