Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1980-03-17
1981-09-29
Gantz, Delbert E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252455R, 252456, 252462, 252464, 252468, 252469, 252470, B01J 2724, B01J 2906, B01J 2310, B01J 2314
Patent
active
042922038
ABSTRACT:
Maleic anhydride is produced by the oxidation of 1,3-butadiene, n-butylenes, crotonaldehyde and furan with molecular oxygen in the vapor phase in the presence of catalytic oxides of antimony, molybdenum, at least one element selected from the group consisting of niobium, zirconium, titanium and tantalum and optionally a reducing agent capable of reducing at least part of the molybdenum in the catalyst to a valence state below +6 selected from the group consisting of hydrazine hydrate, molybdenum, tungsten, magnesium, aluminum, and nickel. This catalyst may optionally contain one or more elements selected from the group consisting of Li, Ag, Ce, Cd, Co, As, Si, Zn, Ge, Bi, Ru, Pt, U, Al and Ni. Preferred catalysts contain Nb, Zr, Ta or Ti in combination with Nb, Zr, or Ta. Especially desirable yields of maleic anhydride are obtained from 1,3-butadiene in the presence of a catalyst wherein molybdenum metal is used as a reducing agent.
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Kirk-Othmer Encyclopedia of Chemical Technology, 2nd Completely Revised Edition, vol. 13, pp. 654-655.
Milberger Ernest C.
Wong Eunice K. T.
Curatolo Joseph G.
Evans Larry W.
Gantz Delbert E.
Knudsen Herbert D.
The Standard Oil Company
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