PRODUCTION OF MALEIC ANHYDRIDE FROM FOUR-CARBON HYDROCARBONS USING CATALYSTS

    公开(公告)号:CA1099694A

    公开(公告)日:1981-04-21

    申请号:CA302918

    申请日:1978-05-09

    Inventor: BREMER NOEL J

    Abstract: PRODUCTION OF MALEIC ANHYDRIDE FROM FOUR-CARBON HYDROCARBONS USING CATALYSTS PREPARED BY HYDROTHERMAL TECHNIQUES Exceptionally reproducible catalysts comprising vanadium and phosphorus are obtained when an aqueous oxide slurry comprising vanadium, phosphorus and a mineral acidfree, 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.degree.C under autogenous pressure so that substantial evaporation of the water in said oxide slurry is prevented. Especially preferred catalysts comprise vanadium, phosphorus, uranium and oxygen. Catalysts prepared in accordance with the invention are especially desirable in the oxidation of n-butane, nbutenes, 1,3-butadiene or mixture thereof.

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