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:
Dec. 29, 2009
Filed:
Sep. 15, 2004
Federico Ghelfi, Crevalcore, IT;
Gianluca Mazzoni, Torre Boldone, IT;
Carlo Fumagalli, Albano San Alessandro, IT;
Fabrizio Cavani, Modena, IT;
Francesca Pierelli, Fano, IT;
Federico Ghelfi, Crevalcore, IT;
Gianluca Mazzoni, Torre Boldone, IT;
Carlo Fumagalli, Albano San Alessandro, IT;
Fabrizio Cavani, Modena, IT;
Francesca Pierelli, Fano, IT;
Lonza S.p.A., Scanzorosciate, IT;
Abstract
Disclosed is a process for the preparation of a modified vanadium/phosphorus mixed oxide catalyst for the partial oxidation of n-butane to maleic anhydride. The catalyst comprises vanadyl pyrophosphate as main component and niobium as a promoter element in an amount corresponding to an atomic ratio of vanadium to niobiurn in the range of 250:1 to 60:1. The catalyst exhibits improved activity, improved yield of maleic anhydride, and optimal performance from the very beginning of its catalytic lifetime.