Method of regenerating catalyst in a swirl type regenerator containing a dilute phase baffle

Claim 1

An improved hydrocarbon conversion catalyst regeneration operation in the presence of fluidizable catalyst particles comprising maintaining a fluid bed of catalyst particles circulating circumferentially in a regeneration zone, said bed comprising a dense phase and a dilute phase, said zone containing in the dense phase an annular section formed by a curved upwardly extending baffle spaced inwardly from the outer wall thereof, the improved method comprising: introducing catalyst particles obtained from a hydrocarbon conversion operation after stripping thereof into said zone tangentially to said circulating bed of catalyst, the dilute phase of said zone having positioned therein a dilute phase baffle, extending from beneath the dense phase to the cyclone inlet and from the outer wall of the regenerator inwardly to about the center thereof, passing regeneration gas upwardly through the circulating fluidized particles in said regeneration zone, recovering gaseous products of regeneration from an upper portion of the regeneration zone, and withdrawing regenerated catalyst from a lower section of said fluid bed of catalyst.