Disengager stripper

Patent · Tue Oct 27 04:00:00 EST 1992

OSTI ID:7052972

Cetinkaya, I B

This patent describes a process for the fluidized catalytic cracking (FCC) of an FCC feedstream. It comprises: passing FCC catalyst and the FCC feedstream to a riser reaction zone and contacting the feedstream with the FCC catalyst in the riser reaction zone at a temperature above 427[degrees]C and a pressure above 65 kPa to convert the feedstream to product vapors; discharging a mixture of the product vapors and spent FCC catalyst from the riser directly to the inlet of a disengaging vessel; stabilizing the inner vortex with a vortex stabilizer in the disengaging vessel; emptying catalyst particles in closed communication from the bottom of the disengaging vessel directly into the top of a subajacent stripping vessel; injecting a stripping gas into the stripping vesse4l and contacting the catalyst particles with the stripping gas to desorb hydrocarbons from the catalyst particles; discharging a gaseous stream of desorbed hydrocarbons and stripping gas upwardly from the stripping vessel; maintaining a relatively dense bed of catalyst in the stripping vessel; withdrawing the product vapor and the gaseous stream from the central outlet to a separator to recover additional catalyst particles; recovering a product stream from the separator; transferring catalyst particles from the separator to a lower portion of the stripping vessel; removing spent FCC catalyst from the lower end of the stripping vessel and transferring the spent catalyst to a regeneration zone; regenerating the FCC catalyst in the regeneration zone by the oxidative removal of coke; and, transferring FCC catalyst from the regeneration zone to the riser reaction zone.

• Assignee: UOP, Des Plaines, IL (United States)
• Patent Number(s): US 5158669; A
• Application Number: PPN: US 7-613037
• OSTI ID: 7052972
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
020500 -- Petroleum-- Products & By-Products
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COKE
CRACKING
DECOMPOSITION
HYDROCARBONS
INDUSTRIAL PLANTS
MANAGEMENT
MATERIALS RECOVERY
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PETROLEUM REFINERIES
PROCESSING
PYROLYSIS
REFINING
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING