Synthesis of maleic anhydride

Details Synthesis of maleic anhydride Synthesis of maleic anhydride

B - Operations, Transporting

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B01J 21/06 (2006.01) B01J 23/16 (2006.01) B01J 23/28 (2006.01) B01J 23/30 (2006.01) B01J 23/88 (2006.01) C07C 51/25 (2006.01) C07C 51/31 (2006.01) C07D 307/60 (2006.01)

Patent

CA 1117930

SYNTHESIS OF MALEIC ANHYDRIDE ABSTRACT OF THE DISCLOSURE 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 cat- alytic 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 option- ally 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. 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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