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:
Jun. 05, 2007
Filed:
Mar. 15, 2000
Gerhard Olbert, Dossenheim, DE;
Franz Corr, Ludwigshafen, DE;
Peter Reuter, Mannheim, DE;
Ludwig Wambach, Schwetzingen, DE;
Ulrich Hammon, Mannheim, DE;
Gerhard Olbert, Dossenheim, DE;
Franz Corr, Ludwigshafen, DE;
Peter Reuter, Mannheim, DE;
Ludwig Wambach, Schwetzingen, DE;
Ulrich Hammon, Mannheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A multitube fixed bed reactor and the use of such a reactor for carrying out catalytic gas-phase reactions, in particular for carrying out exothermic and endothermic catalytic gas-phase reactions such as the preparation of phthalic anhydride (PA), acrylic acid, methacrylic acid (MAA), acrolein, maleic anhydride (MA), glyoxal, phosgene, hydrocyanic acid or vinyl formamide (VFA). In a relatively large multitube reactor in which a large amount of heat of reaction is generated owing to the numerous catalyst tubes () and has to be removed, it is proposed that the ratio of tube spacing t to external tube diameter dbe made dependent on the reactor diameter or on the external tube bundle diameter d. At an external diameter of the catalyst tube bundle () of more than 4 meters, a ratio of tube spacing d to external tube diameter dof at least 1.3 is preferred.