| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject compound in high yield by reacting butadiene with acetic acid and oxygen in the presence of a catalyst, subjecting a reaction formed gas after the separation of a reaction formed solution prepared from a reaction zone to a vapor-liquid separation, supplying the separated gas to the reaction zone and feeding the separated liquid together with the reaction formed solution to the purifying process of diacetoxybutene. SOLUTION: Butadiene is reacted with acetic acid and oxygen in the presence of a catalyst such as palladium metal supported on a carrier such as silica at 40-180 deg.C. The obtained reaction produced solution and the reaction produced gas containing about 0.05-0.1wt.% of water are further subjected to vapor-liquid separation by a heat exchange type condenser. Butadiene is recovered from the separated gas, which is recycled and used for the reaction, the separated liquid is mixed with the reaction produced solution, optionally acetic acid and water are removed in a purifying process to give the objective compound. The water in the circulating gas is removed and reduced to <=0.01wt.% so that reduction in catalytic activity can be prevented. |
