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. 08, 1998
Filed:
Apr. 28, 1997
Applicant:
Inventors:
Gianluca Mazzoni, Torre Boldone, IT;
Fabrizio Cavani, Modena, IT;
Giancarlo Stefani, Gorle/Bergamo, IT;
Assignee:
Lonza SPA, Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; B01J / ;
U.S. Cl.
CPC ...
549233 ; 502209 ;
Abstract
A vanadium/phosphorus mixed oxide catalyst precursor is transformed into the active catalyst for the production of maleic anhydride. The activation takes place in a fluidized bed and includes the steps of (a) initially heating the precursor; (b) further heating under superatmospheric pressure; (c) isothermal stage at superatmospheric pressure; and, finally, (d) cooling the activated catalyst obtained. Catalysts activated according to this procedure show high performance in the conversion of non-aromatic hydrocarbons to maleic anhydride.