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:
Mar. 26, 2019
Filed:
Jul. 02, 2015
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Jürgen Arras, Itzehoe, DE;
Stefan Wershofen, Mönchengladbach, DE;
Javier Pérez-Ramirez, Zürich, CH;
Tobias Caesar Keller, Bremgarten, CH;
Assignee:
COVESTRO DEUTSCHLAND AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 12/00 (2006.01); C07C 209/78 (2006.01); C08G 12/08 (2006.01); C07C 209/54 (2006.01); B01J 29/08 (2006.01); B01J 29/70 (2006.01); B01J 29/18 (2006.01); B01J 29/00 (2006.01);
U.S. Cl.
CPC ...
C08G 12/08 (2013.01); B01J 29/08 (2013.01); B01J 29/18 (2013.01); B01J 29/70 (2013.01); B01J 29/7007 (2013.01); C07C 209/54 (2013.01); C07C 209/78 (2013.01); Y02P 20/582 (2015.11);
Abstract
The invention relates to a production process for polyamines through condensation of aromatic amines with formaldehyde employing at least one solid zeolite catalyst partially or fully ion-exchanged to the protonic form which has been