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:
Jul. 08, 2025
Filed:
Sep. 14, 2021
Applicant:
Evonik Operations Gmbh, Essen, DE;
Inventors:
Alexander Richter, Haltern am See, DE;
Christian Nörnberg, Hamburg, DE;
Norbert Kern, Haltern, DE;
Florian Hermes, Haltern am See, DE;
Franz-Erich Baumann, Duelmen, DE;
Martin Roos, Haltern am See, DE;
Daniel Demicoli, Essen, DE;
Assignee:
Evonik Operations GmbH, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 227/20 (2006.01); C07C 227/22 (2006.01);
U.S. Cl.
CPC ...
C07C 227/20 (2013.01); C07C 227/22 (2013.01);
Abstract
An improved process can be used for the acid hydrolysis of polylaurolactam with sulfuric acid. An especially suitable starting material is polylaurolactam which is intended for recycling and which is characterized by a low laurolactam content.