1
Boghosian Edward M: Oxidation of butane to maleic anhydride. Standard Oil Company, Blumberg Gunar J, Gilkes Arthur G, McClain William T, January 21, 1975: US3862146 (33 worldwide citation)

The oxidation of butane to maleic anhydride in the presence of a phosphorus-vanadium-oxygen complex catalyst is enhanced by the addition to the catalyst of a zinc, bismuth, copper or lithium activator. The yield of the oxidation may be increased as much as 50% without any loss in selectivity to male ...


2
Carl A Udovich, Bernard L Meyers: Oxidation of butane to maleic anhydride. Standard Oil Company, G J Blumberg, William T McClain, William H Magidson, August 11, 1981: US04283288 (24 worldwide citation)

A novel catalyst for the oxidation of butane to produce maleic anhydride comprising a phosphorus and vanadium mixed oxide wherein the catalyst is prepared by using an organic medium and has a specific phase identified by characteristic X-ray pattern. A process for the manufacture of maleic anhydride ...


3
Rashmikant M Contractor: Improved vapor phase catalytic oxidation of butane to maleic anhydride. E I Du Pont de Nemours and Company, May 26, 1987: US04668802 (16 worldwide citation)

Oxidation of butane to maleic anhydride using a vanadium-phosphorus oxide catalyst, in oxidized form, wherein the resulting reduced catalyst is separately regenerated. A recirculating solids reactor can be employed. Less than the stoichiometric amount of oxygen, based on the total amount of butane c ...


4
Mitchell Becker, John Walden: Optimizing the yield of maleic anhydride catalyst. Scientific Design Company, Kenneth H Johnson, January 3, 1989: US04795818 (15 worldwide citation)

A method of optimizing the yield of a vanadium-phosphorus catalyst during the oxidation of butane to maleic anhydride, which comprises establishing the temperature at which the catalyst provides the desired percentage conversion and yield of maleic anhydride with the established feed composition and ...


5
Dickason Alan F: Oxidation of butane to maleic anhydride using butane-rich feed. Sun Ventures, Church George L, Johnson Donald R, Back Stanford M, August 12, 1975: US3899516 (13 worldwide citation)

In the oxidation of n-butane to maleic anhydride using a variety of catalysts, a substantial improvement in the selectivity for maleic anhydride is obtained when the mole ratio of butane to oxygen is greater than 1:4.


6
Rashmikant M Contractor: Vapor phase catalytic oxidation of butane to maleic anhydride. E I Du Pont de Nemours and Company, June 4, 1991: US05021588 (7 worldwide citation)

The oxidation of butane to maleic anhydride in a recirculating solids reactor using a stoichiometric excess of oxygen, a vanadium-phosphorus oxide catalyst in oxidized form, and separate regeneration of the resultant reduced catalyst is disclosed.


7
Carl A Udovich, Eugene H Hirschberg, Ralph J Bertolacini: Process for the manufacture of catalysts useful for the oxidation of butane to malelic anhydride. Standard Oil Company, Gunar J Blumberg, William T McClain, William H Magidson, November 22, 1983: US04416803 (7 worldwide citation)

A process for the manufacture of a phosphorus/vanadium/metal oxide catalyst suitable for the oxidation of butane to maleic anhydride can be prepared by reacting orthophosphoric acid in an aliphatic alcohol and reacting a vanadium compound with an acid and the metal in the aliphatic alcohol to produc ...


8
Alan F Dickason, Wesley R Cherry: Oxidation of butane to maleic anhydride. Sun Ventures, J Edward Hess, Donald R Johnson, Stanford M Back, September 2, 1980: US04220595 (7 worldwide citation)

A catalyst comprising A--V--P, where A is an alkaline earth metal, has been found to be effective in the oxidation of butane to maleic anhydride. The catalyst may be employed in combination with an inert support such as TiO.sub.2. This catalyst is characterized in having high selectivity and stabili ...


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Carl A Udovich, Robert C Edwards: Catalysts for the production of maleic anhydride by the oxidation of butane. Standard Oil Company, Gunar J Blumberg, William T McClain, William H Magidson, April 9, 1985: US04510259 (5 worldwide citation)

A process for the manufacture of a phosphorus-vanadium oxide and a phosphorus-vanadium-co-metal catalyst suitable for the oxidation of butane to maleic anhydride is disclosed. The catalyst is prepared by reacting, in an aqueous medium, a vanadium compound, inorganic acid and, if used, a metal oxide. ...