Patent ID: 7345193

Claim:
A method of contact catalytic reaction for producing diacetoxybutene, comprising introducing an oxygen-containing gas and a liquid containing butadiene and acetic acid into a lower part of a reaction zone comprising a liquid phase and a catalyst-packed bed held therein, passing the gas and the liquid through the catalyst-packed bed as a flow of a gas/liquid mixed phase comprising the liquid and bubbles of the gas finely dispersed therein, and causing a gas and a liquid containing diacetoxybutene to flow out of an upper part of the reaction zone, wherein the horizontal-direction movement of the gas/liquid mixed phase flow around the lower side of the catalyst-packed bed is controlled by disposing, under the catalyst-packed bed, flow control plates projecting downward from the lower side of the bed, wherein the catalyst-packed bed is a fixed bed, wherein the oxygen-containing gas contains 12 mol % or more of oxygen, and the catalyst-packed bed has a porosity of from 0.30 to 0.41.