| 摘要 |
<p>PURPOSE:To obtain the titled compound advantageously from methanol and/or dimethyl ether, by using a specific zeolite catalyst under specific conditions, accompanied with recycling to the reaction system part of or whole fraction remaning after elimination of the titled compound from the reaction product. CONSTITUTION:Methanol or dimethyl ether or both in the gas form are contacted with one or more catalysts selected from alkaline earth metal-containing zeolite, alkaline earth metal-containing zeolite modified with the alkaline earth metal and ZSM based zeolite modified with an alkaline earth metal at a weight hourly space velocity of 0.1-20hr<-1> at 300-650 deg.C reaction temperature under 0.1-100atm total pressure and converted into a hydrocarbon, followed by eliminating 2-3C olefin from the resultant reaction product, preferably further eliminating an aromatic component, and recycling the remaining fraction to the above-mentioned reaction system to obtain the aimed lower olefin, especially 2- 3C olefin in high yield with a long catalyst life and a long stability period.</p> |
