Apparatus for the separation of fluid cracking catalyst particles from gaseous hydrocarbons

Patent · Tue Sep 08 04:00:00 EDT 1987

OSTI ID:5826819

Parker, W A; Dewitz, T S; Hinds, Jr, G P; Gwyn, J E; Bilgie, A H; Hardesty, D E

This patent describes an apparatus for separating suspensions of catalyst particles and gaseous hydrocarbons and for stripping hydrocarbons from the catalyst particles after traversing a riser conduit. It consists of: (a) an upright hollow housing having a lower portion, a middle portion, and an upper portion, a gaseous hydrocarbon vortex outlet with a diameter in the upper portion of the housing for removing clean gaseous hydrocarbons, and a stripped catalyst outlet means in the lower portion of the housing for removing stripped catalyst. The housing has a tangential inlet means in the upper portion to form a swirl zone wherein suspensions of catalyst particles and gaseous hydrocarbons entered through the inlet means form a fluid vortex; (b) a vortex stabilizer means having a perimeter and coaxially mounted in the middle portion of the housing and having a diameter of at least the diameter of the gaseous hydrocarbon vortex outlet and positioned a distance from the gaseous hydrocarbon vortex outlet means to define a cyclone zone. The catalyst particles are separated from gaseous hydrocarbons to form a clean fluid. The vortex stabilizing means stabilizes and centers the vortex to minimize reentrainment of the particles into the clean gaseous fluid; (c) means for supporting a fluidized catalyst bed below thee vortex stabilizer means near the bottom of the hollow housing and having a fluidized bed of catalyst being supported and defining, intermediate the fluidized catalyst support means and the vortex stabilizer means; (d) means for injecting stripping gas into the fluidized catalyst to minimize adsorbed hydrocarbons on the catalyst particles.

• Assignee: Shell Oil Co., Houston, TX
• Patent Number(s): US 4692311
• OSTI ID: 5826819
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DESIGN
DISPERSIONS
FLUIDIZED BEDS
HYDROCARBONS
OPERATION
ORGANIC COMPOUNDS
PARTICLES
PARTICULATES
PYROLYSIS
RECOVERY
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SORPTION
SUSPENSIONS
THERMOCHEMICAL PROCESSES