Patent ID: 9327278
Filing Date: 2016-05-03
CPC Classification: B01J,C10G

Claim Text:
1. A method of regenerating a catalyst comprising: withdrawing a partially deactivated catalyst having coke formed thereon from a reaction zone wherein the partially deactivated catalyst comprises a zeolite and having coke deposit that includes at least 2 wt % hydrogen; feeding the partially deactivated catalyst to a first combustion zone of a regeneration zone operating at first regeneration conditions; passing a first regeneration gas stream comprising oxygen to the first regeneration zone to remove a portion of the coke therefrom, to generate a partially regenerated catalyst; feeding the partially regenerated catalyst to a second combustion zone of the regeneration zone operating at second regeneration conditions that are more severe than the first regeneration conditions; passing a second regeneration gas stream comprising oxygen to the second combustion zone; and feeding the regenerated catalyst having minimal hydrothermal damage back to the reaction zone.