| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing acrylic acid in high yield by one-stage gas phase catalytic oxidation of propane. SOLUTION: Metals Mo, V, Sb and A (however, A Is one or more elements selected from the group consisting of Nb, Ta, Sn, W, Ti, Ni, Fe, Cr and Co) at a ratio represented by the following composition formula (I). The production of acrylic acid by gas phase catalytic oxidation of propane using a product catalyst, the propane concentration in the gas supplied to the reactor is 2% by volume or more, and the volume ratio of each gas constituting the supplied gas is , Propane: oxygen: diluent gas = The metal oxide catalyst from 1: 0 to 0.5: 0 to 49 and in the reduced state resulting from the reaction is separated from the product gas stream and reoxidized with an oxygen-containing gas before it is again contacted with propane. A method for producing acrylic acid. MoViSbjAk (I) (where i, j and k are all 0.001 to 3. 0) |