Combustion regeneration of hydrocarbon conversion catalyst with recycle of high temperature regenerated catalyst

Claim 1

A method for regenerating a hydrocarbon conversion catalyst to remove deposited carbonaceous material which comprises, maintaining a first dense fluid bed of regenerated catalyst in the lower portion of an elongated regeneration zone, introducing a first oxygen containing regeneration gas stream to an upper portion of said first fluid bed of catalyst and introducing a second oxygen containing regeneration gas stream to a lower bottom portion of said first fluid bed of catalyst, causing catalyst particles to move continuously upwardly through said first fluid bed into a less dense fluid phase of suspended catalyst particles in regeneration gas traversing an upflow catalyst regeneration zone, wherein the density of suspended catalyst decreases in the direction of flow, introducing spent catalyst particles with carbonaceous deposits into an upper portion of said first fluid bed of upflowing regenerated catalyst particles above said first oxygen containing gas stream in a ratio of spent catalyst with deposited carbon to regenerated catalyst providing a mix temperature of at least 1200°F., separating catalyst particles from regeneration flue gases after traverse of said less dense upflow catalyst regeneration zone and collecting the separated catalyst as a second separate dense fluid bed of regenerated catalyst above said first bed of catalyst, passing regenerated catalyst from said second catalyst bed to a lower portion of said first bed of catalyst above said second regeneration gas stream and below said first regeneration gas stream and withdrawing regenerated catalyst from a lower portion of said first bed for hydrocarbon conversion.

Claim 2

A method for regenerating a hydrocarbon conversion catalyst to remove deposited carbonaceous material which comprises, maintaining a first dense fluid bed of regenerated catalyst in the lower portion of an elongated regeneration zone, introducing a first oxygen containing regeneration gas stream to an upper portion of said first fluid bed of catalyst and introducing a second oxygen containing regeneration gas stream to a lower bottom portion of said first fluid bed of catalyst, causing catalyst particles to move continuously upwardly through said first fluid bed into a less dense fluid phase of suspended catalyst particles in regeneration gas traversing an upflow catalyst regeneration zone, wherein the density of suspended catalyst decreases in the direction of flow, introducing spent catalyst particles with carbonaceous deposits into an upper portion of said first fluid bed of upflowing regenerated catalyst particles above said first oxygen containing gas stream in a ratio of spent catalyst with deposited carbon to regenerated catalyst providing a mix temperature of at least 1200°F., separating catalyst particles from regeneration flue gases after traverse of said less dense upflow catalyst regeneration zone and collecting the separated catalyst as a second separate dense fluid bed of regenerated catalyst above said first bed of catalyst, passing regenerated catalyst from said second catalyst bed to a lower portion of said first bed of catalyst above said second regeneration gas stream and below said first regeneration gas stream and withdrawing regenerated catalyst from a lower portion of said first bed for hydrocarbon conversion.