Production of maleic anhydride from four-carbon hydrocarbons...

Details Production of maleic anhydride from four-carbon hydrocarbons... Production of maleic anhydride from four-carbon hydrocarbons...

C - Chemistry, Metallurgy

07

D

252/52.K, 260/36

C07D 307/60 (2006.01) B01J 27/198 (2006.01) C07C 51/215 (2006.01) C07C 51/25 (2006.01)

Patent

CA 1099694

PRODUCTION OF MALEIC ANHYDRIDE FROM FOUR-CARBON HYDROCARBONS USING CATALYSTS PREPARED BY HYDROTHERMAL TECHNIQUES ABSTRACT OF THE DISCLOSURE Exceptionally reproducible catalysts comprising vanadium and phosphorus are obtained when an aqueous oxide slurry comprising vanadium, phosphorus and a mineral acid- free, inorganic reducing agent, which is capable or reducing the vanadium in the catalyst to a valence state below +5, is heated at an elevated temperature of at least 120°C under autogenous pressure so that substantial evaporation of the water in said oxide slurry is prevented. Especially pre- ferred catalysts comprise vanadium, phosphorus, uranium and oxygen. Catalysts prepared in accordance with the invention are especially desirable in the oxidation of n-butane, n- butenes, 1,3-butadiene or mixture thereof.

302918

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