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:
Oct. 25, 2016
Filed:
Feb. 04, 2016
Covestro Deutschland Ag, Leverkusen, DE;
Andreas Jacob, Marburg, DE;
Stefan Wershofen, Monchengladbach, DE;
Stephan Klein, Mettmann, DE;
Jorg Sundermeyer, Marburg, DE;
Fuming Mei, Hubei, CN;
Covestro Deutschland AG, Kaiser-Wilhelm-Allee, Leverkusen, DE;
Abstract
Urethanes are prepared by oxidative carbonylation of at least one amino compound in the presence of carbon monoxide, oxygen and organic, at least one hydroxyl-group-carrying compound. The carbonylation is carried out in the absence of halogen-containing promoters. The carbonylation is also carried out in the presence of a metal complex catalyst which contains neutral bidentate N-chelate ligands of the (N˜N) type, two monoanionic N,O-chelate ligands of the general type (N˜O)or tetradentate dianionic chelate ligands (O˜N˜N˜O).