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:
Sep. 10, 2002
Filed:
Nov. 06, 2000
Applicant:
Inventors:
Thomas Haas, Frankfurt, DE;
Jürgen Glenneberg, Offenbach, DE;
Rudolf Wagner, Grosskrotzenburg, DE;
Matthias Creutz, Rossdorfer, DE;
Jörg Sauer, Gelnhausen, DE;
Rudolf Vanheertum, Kahl, DE;
Assignee:
Degussa-Huls AG, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 1/5023 ;
U.S. Cl.
CPC ...
C01B 1/5023 ;
Abstract
In carrying out the hydrogenation stage of the anthraquinone process for the preparation of hydrogen peroxide in a hydrogenation reactor on a fixed bed catalyst of a particulate catalyst, the service life of the catalyst is increased in that the working solution comprising the reaction carrier and a gas phase comprising hydrogen, are passed through the hydrogenation reactor from the bottom upwards. The empty tube speed of the working solution is 0.05 to 100 m/h, preferably 10 to 50 m/h.