IMPROVED BATHTUB-TYPE SPENT CATALYST DISTRIBUTION FOR EFFECTIVE COUNTERCURRENT REGENERATION IN FLUID CATALYTIC CRACKING UNITS

摘要

An improved spent catalyst regenerator which contains sub-troughs branching off from the main trough, distribution troughs which extend outward from the sid es of the main trough and the sub-troughs, and downflow tubes extending downward from the bottom of the main trough and sub-troughs.