Verfahren zur Herstellung von Propylene

摘要

A process for the production of lower olefins by dehydrating lower alcohols having 2 to 4 carbon atoms which comprises using a gamma -alumina catalyst containing 0.3% by weight or less of impurities in total excluding SiO2, the impurities including 0.2% by weight or less of sulfur content calculated in terms of SO4<-><-> and 0.05% by weight or less of sodium content calculated in terms of Na2O, and/or a process for the production of lower olefins by dehydrating lower alcohols having 2 to 4 carbon atoms that comprises using a gamma -alumina catalyst which contains 0.5 to 5% by weight of SiO2. According to the process of the present invention, lower olefins can be produced from lower alcohols with high yield and high selectivity for a prolonged period of time without reducing the catalytic activity.