Catalytic cracking process with multiple catalyst outlets

Patent · Tue Nov 05 04:00:00 EST 1991

OSTI ID:5383281

Leib, T M; Sapre, A V

This patent describes improvement in a process for the fluidized catalytic cracking (FCC) of a hydrocarbon by contact of a crackable hydrocarbon with a source of regenerated FCC catalyst in a cracking reactor to produce catalytically cracked products and coked FCC catalyst which is regenerated in a single dense bed regenerator which maintains a catalyst inventory of at least 100 tons of catalyst as a dense phase, bubbling, fluidized bed of catalyst having a depth of at least 8 feet within a regenerator vessel having a diameter of at least 10 feet, wherein coked cracking diameter of at least 1 foot, the inlet discharging coked catalyst into the regenerator dense bed, and wherein the coked catalyst is regenerated in the dense bed by contact with an upflowing supply of oxygen or an oxygen containing gas to produce regenerated catalyst which is withdrawn from the catalyst bed via a single catalyst outlet connected with the bubbling catalyst inlet. The improvement comprises use of a swirl regenerator comprising a swirling, fluidized dense bed of catalyst, wherein coked catalyst is added via a single inlet in the center of the regenerator dense bed and regenerated catalyst is withdrawn from the dense bed via at least two catalyst withdrawal means which are both radially distributed and symmetrically distributed about the single inlet.

• Assignee: Mobil Oil Corp., New York, NY (United States)
• Patent Number(s): A; US 5062944
• Application Number: PPN: US 7-431952
• OSTI ID: 5383281
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CATALYTIC CRACKING
CHEMICAL REACTIONS
COKE
CRACKING
DECOMPOSITION
FLUIDIZED BEDS
HYDROCARBONS
INDUSTRIAL PLANTS
ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PETROLEUM REFINERIES
PYROLYSIS
THERMOCHEMICAL PROCESSES