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:
Feb. 19, 2013
Filed:
Jan. 26, 2010
Uwe Dingerdissen, Seeheim, DE;
Jan Pfeffer, Essen, DE;
Thomas Tacke, Alzenau, DE;
Thomas Haas, Muenster, DE;
Harald Schmidt, Muelheim an der Ruhr, DE;
Michael Volland, Duelmen, DE;
Michael Rimbach, Herne, DE;
Christian Lettmann, Coesfeld, DE;
Roger Sheldon, Hoog-Kappel, NL;
Michiel Janssen, The Hague, NL;
Uwe Dingerdissen, Seeheim, DE;
Jan Pfeffer, Essen, DE;
Thomas Tacke, Alzenau, DE;
Thomas Haas, Muenster, DE;
Harald Schmidt, Muelheim an der Ruhr, DE;
Michael Volland, Duelmen, DE;
Michael Rimbach, Herne, DE;
Christian Lettmann, Coesfeld, DE;
Roger Sheldon, Hoog-Kappel, NL;
Michiel Janssen, The Hague, NL;
Evonik Degussa GmbH, Essen, DE;
Abstract
The invention relates to a method for producing 2,6-dioxabicyclo-(3.3.0)-octane-4,8-dione (I), comprising the oxidation of dianhydrohexitols (II-IV), or of corresponding hydroxy ketones, with an oxygen-containing gas in the presence of a catalyst composition, the reaction proceeding without the addition of halogen sources.