Short contact time fluid catalytic cracking process

Patent · Tue Dec 27 04:00:00 EST 1988

OSTI ID:6190690

Haddad, J H; Owen, H

A fluid catalytic cracking process comprising the steps of: (a) passing hydrocarbon feed and catalyst into an upstream end of an elongated tubular riser; (b) upwardly discharging the mixture from a downstream end of the riser into a deflector baffle; (c) downwardly deflecting the discharged mixture; (d) injecting stripping gas from outside the disengaging vessel directly into the first stripping zone; (e) stripping the downwardly deflected catalyst in the first stripping zone by contact with a stream of the stripping gas on trays located within the first stripping zone to produce a stripped vapor stream; (f) passing the stripped vapor stream through a conduit; (g) separating a portion of catalyst from the stripped vapor stream in the cyclone to form a separated catalyst stream and a vapor product stream; (h) passing the vapor product stream from the cyclone through a cyclone overhead conduit directly into a closed conduit; (i) passing a disengaging vessel vapor stream through an annulus defined; (j) combining the disengaging vessel vapor stream and stripped vapor stream in the closed conduit to form a combined vapor stream; (k) passing the combined vapor stream through the closed conduit directly to outside the disengaging vessel atmosphere; and (l) passing the stripped catalyst stream from the stripping vessel to a second stripping zone located within the disengaging vessel and below the first stripping zone.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4793915
• OSTI ID: 6190690
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
BAFFLES
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CHEMICAL REACTORS
CONTAINERS
CONTROL EQUIPMENT
CRACKING
DECOMPOSITION
EQUIPMENT
FLOW REGULATORS
FLUIDS
GASES
HYDROCARBONS
MASS TRANSFER
ORGANIC COMPOUNDS
PYROLYSIS
REMOVAL
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
VAPORS