Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1978-05-01
1980-12-23
Gantz, Delbert E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252455R, 252456, 252462, 252464, 252468, 252469, 252470, B01J 2724, B01J 2906, B01J 2916, B01J 2310
Patent
active
042409314
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.
REFERENCES:
patent: 3341471 (1967-09-01), Callohan et al.
patent: 3387038 (1968-06-01), Koch
patent: 3595911 (1971-07-01), Ball
patent: 3907834 (1975-09-01), Milberger et al.
patent: 3956378 (1976-05-01), Grasselli et al.
patent: 3984353 (1976-10-01), Sergunkin et al.
patent: 3994833 (1976-11-01), Jany et al.
patent: 4129592 (1978-12-01), Slinkard et al.
Milberger Ernest C.
Wong Eunice K. T.
Curatolo Joseph G.
Evans Larry W.
Gantz Delbert E.
Knudsen Herbert D.
Standard Oil Company
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