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:
Dec. 14, 1999
Filed:
Mar. 29, 1996
Applicant:
Inventors:
Hans-Josef Buysch, Krefeld, DE;
Carsten Hesse, Krefeld, DE;
Jorg-Dietrich Jentsch, Mulheim, DE;
Johann Rechner, Kempen, DE;
Eberhard Zirngiebl, Koln, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; C07C / ;
U.S. Cl.
CPC ...
502230 ; 502308 ; 502309 ; 502311 ; 502318 ; 502321 ; 502324 ; 502325 ; 502326 ; 502330 ; 502331 ; 502345 ; 502350 ; 502312 ; 502313 ; 502314 ; 502315 ; 502316 ; 558270 ; 558271 ; 558274 ; 558275 ;
Abstract
In the process for preparing an aromatic carbonate from an aromatic hydroxy compound, CO and O.sub.2 in the presence of a quaternary salt and a base, use is advantageously made of supported catalysts which, in the reaction-ready state, contain a platinum metal, a platinum metal compound or a complex containing a platinum metal compound on a support comprising a metal oxide whose metal can occur in a plurality of oxidation states.