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. 20, 2020
Filed:
May. 14, 2018
Covestro Deutschland Ag, Leverkusen, DE;
Stefan Wershofen, Mönchengladbach, DE;
Markus Dugal, Kempen, DE;
Gernot Jaeger, Cologne, DE;
Anton Vidal Ferran, Montbrió del Camp, ES;
Jose Luis Nuñez Rico, Tarragona, ES;
Covestro Deutschland AG, Leberkusen, DE;
Abstract
The present invention relates to silica-based heterogeneous zinc compounds which are suitable as catalysts in the reaction of amines with dialkyl carbonates to produce carbamates. The catalysts have the formula [SiO]—CH—CHR—X—COOZn[Y], wherein [SiO] represents a silica carrier selected from the group consisting of ordered mesoporous silica and irregular amorphous narrow pore silica, R represents a moiety selected from the group consisting of hydrogen, —CH, and —CHCH, preferably hydrogen, X is an aliphatic chain of 2 to 11 carbon atoms that optionally comprises ether moieties and [Y] represents a mono anion. The invention is also directed towards a method for the preparation of the aforementioned compounds and towards method for the alkoxycarbonylation of amines.