APPARATUS FOR FLUIDIZED CATALYTIC CRACKING OF HYDROCARBONS

摘要

An apparatus for fluid catalytic cracking of hydrocarbons including an elongated confined reaction conduit comprising an elongated riser having catalyst and hydrocarbon introduction means at the lower end thereof, a flow reversal means connected to the upper end of said riser for reversing the flow direction of catalyst and hydrocarbons exiting said riser, and a downcomer forming an annular space around an upper portion of said riser for receiving catalyst and hydrocarbons from said flow reversal means and conveying them downward into a reaction vessel. Reaction methods and process conditions are given for use with the disclosed apparatus.