Patent ID: 11884616
Assignee: UOP LLC
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 8:
9. The process of claim 1, wherein the catalyst is provided from a regeneration zone being operated at a pressure and temperature to reduce a coking on the catalyst,
wherein the pressure of the regeneration zone is greater than the pressure of the at least one reactor, and
wherein a pressure control system is provided between the regeneration zone and the at least one reactor, the pressure control system comprising:
a first surge vessel configured to receive a first stream comprising a mixture of spent catalyst from the at least one reactor and a lift gas and a second stream comprising a purge stream;
a lock hopper disposed vertically below the first surge vessel; and,
a second surge vessel disposed vertically below the lock hopper and configured to provide a high-pressure stream of spent catalyst that is passed to the regeneration zone.