Patent ID: 6248298
Filing Date: 2001-06-19
Classification: B01J,C10G

Abstract:
An FCC unit having a stripping section in which spent FCC catalyst is contacted with a stripping fluid to remove hydrocarbons from the catalyst, the stripping section having at least one stripping tray comprising:an upper portion for receiving the catalyst;a downstream portion, located at a point vertically below the upper portion, said downstream portion terminating in a tray edge for discharging the catalyst downwardly;a slanted tray surface, encompassing both the upper and downstream tray portions, having a tray surface angle of from about 10-80.degree. to impart radial movement to the catalyst as the catalyst flows downward over the tray surface in a vertical fashion; anda plurality of rotational flow means disposed on the tray surface for imparting rotational flow to the catalyst as the catalyst traverses the slanted tray surface.