04396535 is referenced by 11 patents and cites 14 patents.

Vanadium phosphorus mixed oxide containing catalysts are prepared by sequentially forming an alpha-VOPO.sub.4 catalyst precursor in aqueous media, and thereafter partially reducing a portion of the vanadium to a valence state of +4 in an organic liquid reducing media, in the absence of corrosive reducing agents. The catalysts exhibit excellent activity for the production of maleic anhydride from 4 carbon atom hydrocarbons such as n-butane.

Title
Preparation of mixed vanadium phosphorus oxide catalysts and their use in oxidative processes
Application Number
6/320780
Publication Number
4396535
Application Date
November 12, 1981
Publication Date
August 2, 1983
Inventor
Dennis E Dria
Cleveland Heights
OH, US
Noel J Bremer
Kent
OH, US
Agent
Larry W Evans
Herbert D Knudsen
Joseph G Curatolo
Assignee
The Standard Oil Company
OH, US
IPC
B01J 27/14
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