부산대학교 도서관

The oxidative dehydrogenation reaction of isopentene to isoprene over various catalysts was investigated under an atmospheric pressure using a flow apparatus.Influences of the reaction conditions were examined over U-Sb catalyst which was found to be the most active catalyst to promote the formation of isoprene. 60% yield of isoprene was observed under the optimum condition. Double bond isomerization of isopentene was found not so predominant on this catalyst.It was noticed that this reaction was appreciably inhibited by the presence of isoprene; and, the degree of inhibition was influenced markedly by the kind of catalysts and the reaction temperature. Over Bi-Mo catalyst, the reaction was strongly inhibited at 400°C. But, over either U-Sb or Sn-Sb catalysts at the same conditions it was not so much inhibited. Inhibitive action of isoprene was reduced by increasing the reaction temperature. With either Sn-Sb or Bi-Mo catalyst, selectivity to isoprene decreased markedly with increasing isopentene conversion. With U-Sb catalyst, however, high selectivity to isoprene was maintained even under high conversion.