Multiple burn zones with independent circulation loops

摘要

A process for a continuous regeneration of a catalyst wherein the regeneration section includes at least two separate zones. The regeneration includes a combustion zone, and an oxygen boost zone, where the process utilizes at least two independent regeneration gas loops for control of the amount of oxygen to regenerate the catalyst.

主权项

1. A catalyst regeneration process comprising:
passing a spent catalyst stream to an upper regeneration zone; passing a first regeneration gas stream comprising oxygen to the upper regeneration zone, thereby generating a partially regenerated catalyst stream; passing the partially regenerated catalyst stream to a lower regeneration zone; and passing a second regeneration gas stream comprising oxygen to the lower regeneration zone, thereby generating a regenerated catalyst stream; wherein the first regeneration gas stream and the second regeneration gas stream are independent streams.