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:
Nov. 17, 2009
Filed:
Apr. 17, 2006
Ashok S. Padia, Glen Rock, NJ (US);
Arie Bortinger, Ridgewood, NJ (US);
Gianluca Mazzoni, Bergamo, IT;
Tiziana Monti, Bologna, IT;
Ashok S. Padia, Glen Rock, NJ (US);
Arie Bortinger, Ridgewood, NJ (US);
Gianluca Mazzoni, Bergamo, IT;
Tiziana Monti, Bologna, IT;
Scientific Design Company, Inc., Little Ferry, NJ (US);
Lonza S.p.A., Bergamo, IT;
Abstract
An improved process for the production of maleic anhydride by the catalytic oxidation of n-butane. Maleic anhydride is produced by reacting n-butane gas with oxygen gas or an oxygen-containing gas, in the presence of a vanadium phosphorus oxide catalyst. A trialkyl phosphite or trialkyl phosphate component is continuously added to the gases in an amount of from about 0.5 ppm to about 4 ppm by weight of elemental phosphorus in the trialkyl phosphate or trialkyl phosphite component. Heat is applied to the gases at a temperature of from about 400° C. to about 440° C. while maintaining a maximum temperature of gases present in the reaction of about 480° C. A simultaneous conversion of n-butane to maleic anhydride of about 84% or more and a conversion of n-butane to by-product acrylic acid of about 1.5% or less is achieved.