| 摘要 |
Conjugated dienes, such as butadiene, are prepared from monoolefins, such as butene-1, by oxydehydrogenation over a catalyst represented by the following general formula: Nia Cob Fec Bid Le Mh Mof Og IN WHICH L is phosphorus, arsenic or boron, and M is potassium, rubidium or cesium, and wherein a and b have a value of from 0 to 15, a+b being 2 to 15, c is 0.5 to 7, d is 0.1 to 4, e is 0 to 4, f is 12, g is a number determined by the valence requirements represented by Ni, Co, Fe, Bi, L, M and Mo, and h is 0.01 to 1.0.
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