A PROCESS FOR PRODUCING PROPYLENE

摘要

Disclosed is a process for producing propylene, which places at least two reaction zones and comprises the following steps: a) catalytically cracking C4 or higher hydrocarbons in the presence of a solid acidic catalyst to produce hydrocarbons products comprising ethylene and propylene in the first reaction zone; b) reacting methanol and/or dimethyl ether with gas containing ethylene in the presence of a solid acidic catalyst to produce products comprising propylene and higher hydrocarbons in the second reaction zone; c) using at least a portion of ethylene from the products of the first reaction zone as raw materials of the second reaction zone, and using at least a portion of C4 or higher hydrocarbons from the products of the second reaction zone as raw materials of the first reaction zone.