Patent ID: 6703430
Filing Date: 2004-03-09
Classification: B01J,C10G

Abstract:
A means for rejuvenating a reversibly deactivated catalyst in a three phase slurry body having a top portion and a bottom portion and comprising deactivated catalyst particles and gas bubbles in a slurry liquid, wherein the means comprises (a) a hollow rejuvenation vessel at least partially immersed in said slurry body and having a rejuvenation zone within its interior and means for injecting rejuvenating gas up into said zone, (b) a slurry entrance for introducing slurry from the top portion of the slurry body into the rejuvenation zone, the entrance comprising a first slurry gas bubble reducing zone, (c) a slurry exit in fluid communication with the rejuvenation zone and comprising a second slurry gas bubble reducing zone, and (d) a slurry downcomer in fluid communication with the slurry exit, the downcomer extending into the bottom portion of the slurry body for passing slurry from the slurry exit into the bottom portion of the slurry.