Patent ID: 6974842
Filing Date: 2005-12-13
Classification: C10G

Abstract:
1. A process for recovering a solid catalyst from a catalyst slurry comprising residual hydrocarbons, said process comprising: (a) providing a catalyst slurry feedstream comprising catalyst particles and residual hydrocarbons; (b) passing said catalyst slurry feedstream through a heater so as to vaporize a substantial portion of the residual hydrocarbons; (c) conveying the heated slurry feedstream comprising vaporized hydrocarbons and catalyst particles in a riser to a disengaging zone; (d) separating substantially most of the catalyst particles from the vaporized hydrocarbons in the disengaging zone; (e) providing a stripping zone in fluid communication with the disengaging zone, said stripping zone suitably located so as to receive the separated catalyst particles of step (d) from the disengaging zone; (f) supplying a stripping medium in the stripping zone; (g) contacting the separated catalyst particles in the stripping zone with the stripping medium to remove some strippable hydrocarbons remaining after separation step (d) from the separated catalyst particles to produce stripped catalyst particles; (h) recovering an effluent stream comprising vaporized hydrocarbons, strippable hydrocarbons, and stripping medium from the disengaging zone; and (i) recovering the stripped catalyst particles from the stripping zone.