| 摘要 |
PURPOSE:To keep the high activity and the high selectivity of a catalyst for a long period, used for the preparation of diacetoxybutene by the acetoxylation of butadiene, by supplying a compound which is used as an co-catalyst component of the catalyst to the reaction system during the reaction. CONSTITUTION:In the preparation of diacetoxybutene by the gas-phase reaction of butadiene and acid with O2 in the presence of a catalytic system comprising a VIII group noble metal as main component and an alkali metal acetate and an alkali halide as co-catalyst component, acetic acid salt of said alkali metal (e.g. Cs acetate, K acetate, etc.) and an alkali halide is supplied to the reaction system during the reaction to keep the high activity and the selectivity of the catalyst for a long period. |
