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:
May. 31, 2022
Filed:
Jul. 09, 2018
Applicant:
Lg Chem, Ltd., Seoul, KR;
Inventors:
Eun Kyo Kim, Daejeon, KR;
Jeong Seok Lee, Daejeon, KR;
Mi Kyung Kim, Daejeon, KR;
Joo Young Cheon, Daejeon, KR;
Assignee:
LG CHEM, LTD., Seoul, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 207/444 (2006.01); C08F 222/40 (2006.01); C08F 2/01 (2006.01);
U.S. Cl.
CPC ...
C07D 207/444 (2013.01); C08F 2/01 (2013.01); C08F 222/40 (2013.01);
Abstract
The present invention relates to a method for purifying N-substituted maleimide. More particularly, the present invention adopts an evaporation apparatus, which can previously remove impurities having higher boiling points than the N-substituted maleimide after removing an organic solvent from an N-substituted maleimide resulting solution, thereby achieving effects of minimizing the pressure loss and polymerization loss, and obtaining high-purity N-substituted maleimide.