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:
Nov. 26, 2019
Filed:
Nov. 06, 2017
Lg Chem, Ltd., Seoul, KR;
Joo Young Cheon, Daejeon, KR;
Jun Seon Choi, Daejeon, KR;
Ji Yeon Kim, Daejeon, KR;
Wang Rae Joe, Daejeon, KR;
Kyung Soo Kim, Daejeon, KR;
Eung Seob Yeom, Daejeon, KR;
Won Kyun Lee, Daejeon, KR;
LG CHEM, LTD., Seoul, KR;
Abstract
The present invention relates to a synthesis method of N-substituted maleimides using a non-homogeneous solid acid catalyst, and particularly, a synthesis method of N-substituted maleimides with high synthesis yield by using a zirconium(IV) hydrogen phosphate as a catalyst, by which, the loss of the catalyst is minimized, the separation and recovering processes of the catalyst are simplified, in case when the activity of the separated and recovered catalyst is decreased, the complete regeneration of the catalyst is possible via washing or firing, and solvents that could be used during a washing process of the catalyst are not limited.