FLUID CRACKING PROCESS AND THE METHOD FOR SEPARATING A SUSPENSION DISCHARGED FROM A RISER CRACKING ZONE

摘要

A FLUID CRACKING PROCESS AND THE METHOD FOR SEPARATING A SUSPENSION DISCHARGED FROM A RISER CRACKING ZONE A riser cracking-catalyst regeneration operation is described wherein a suspension discharged from the riser cracking operation is separated by catalyst particle concentrating means which discharge a concentrated stream of catalyst into a downcomer zone and out of further contact with discharged hydrocarbons in the suspension. A stripping gas is used to aid the separation of catalyst and hydrocarbon vapors.