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. 15, 2009
Filed:
May. 12, 2004
Martin Dieterle, Mannheim, DE;
Wolfgang Juergen Poepel, Darmstadt, DE;
Silke Berndt, Mannheim, DE;
Raimund Felder, Neustadt, DE;
Signe Unverricht, Mannheim, DE;
Klaus Joachim Mueller-engel, Stutensee, DE;
Martin Dieterle, Mannheim, DE;
Wolfgang Juergen Poepel, Darmstadt, DE;
Silke Berndt, Mannheim, DE;
Raimund Felder, Neustadt, DE;
Signe Unverricht, Mannheim, DE;
Klaus Joachim Mueller-Engel, Stutensee, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
In a process for the thermal treatment of the precursor material of a catalytically active material in a rotary tube furnace through which a gas stream flows, at least a proportion of the gas stream flowing through the rotary tube furnace is circulated, and the associated rotary tube furnace apparatus and tube-bundle reactors for the partial gas-phase oxidation of acrolein to acrylic acid are loaded with catalysts whose catalytically active material is obtainable by the process for the thermal treatment.