| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing acrylic acid at high yield by the one-step vapor phase catalytic oxidation of propane. SOLUTION: When producing acrylic acid by the one-step vapor phase catalytic oxidation of propane in the presence of a metal oxide catalyst containing at least one kind of metals selected from the group consisting of Mo, V, Sb and A (wherein, A is at least one selected from the group consisting of Nb, Ta, Sn, W, Ti, Ni, Fe, Cr and Co) in a content ratio expressed by the formula MoViSbjAk [wherein, (i), (j) and (k) are each 0.001-3.0], the concentration of propane in a feed gas to a reactor is >=2 vol%, the volumetric ratio of (propane: oxygen: diluent gas) which constitute the feed gas is [1:(0-0.5) :(0-49)], and the metal oxide catalyst in a reduced state as a result of the reaction is separated from the product gas stream and is reoxidized with oxygen-containing gas before being brought into contact with propane again. |
