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. 12, 1996
Filed:
Jan. 27, 1995
Hans-Josef Buysch, Krefeld, DE;
Carsten Hesse, Krefeld, DE;
Johann Rechner, Krefeld, DE;
Reinhard Schomacker, Leverkusen, DE;
Paul Wagner, Dusseldorf, DE;
Dieter Kaufmann, Goslar, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
The invention relates to a process for the continuous preparation of diaryl carbonates by reaction of an aromatic hydroxyl compound with carbon monoxide and oxygen in the presence of a catalyst containing a noble metal of group VIIIb of the Periodic Table of the Elements, a quaternary salt, a cocatalyst and a base. The catalyst is activated by treatment with carbon monoxide in the liquid phase. The reaction water is removed by excess reaction gas.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile