| 摘要 |
PURPOSE:To carry out the conversion of butene to propylene in high selectivity, by using a specific dealkalized zeolite-type catalyst. CONSTITUTION:A butane-butene fraction containing >=10wt% butene is made to contact with a catalyst containing a dealkalized zeolite (e.g. ZSM-5, ZSM-11, mordenite, etc.), aluminum fluoride (e.g. alpha-AlF3.3H2O, beta-AlF3.3H2O, etc.) and a metal having weak hydrogenation property (e.g. Ag, Cu, Zn, Fe, etc.), in the presence of hydrogen gas at a molar ratio (butane-butene fraction:hydrogen) of preferably 1:(1-5) under heating at 300-450 deg.C. |
