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. 27, 2007
Filed:
Mar. 04, 2003
Bernd Jaeger, Darmstadt, DE;
Thomas Haas, Frankfurt, DE;
Jürgen Glenneberg, Offenbach, DE;
Jürgen Grunert, Freigericht, DE;
Bernd Jaeger, Darmstadt, DE;
Thomas Haas, Frankfurt, DE;
Jürgen Glenneberg, Offenbach, DE;
Jürgen Grunert, Freigericht, DE;
Degussa AG, Düsseldorf, DE;
Abstract
The invention relates to a process for the production of hydrogen peroxide by the anthraquinone process, comprising a hydrogenation stage, an oxidation stage and an extraction stage. According to the invention, catalytic hydrogenation of anthraquinone derivatives dissolved in a working solution is carried out in the presence of added molecular oxygen. Per mol hydrogen, 0.1 to 10 mmol oxygen is preferably introduced into the hydrogenation stage with the hydrogenating gas, in mixture with an inert gas and/or dissolved and/or dispersed in the working solution. This increases the residence time of the catalyst.