Feed mixing technique for fluidized catalytic cracking of hydrocarbon oil

Patent · Tue Jun 18 04:00:00 EDT 1985

OSTI ID:6366560

Penick, J E

In a fluid catalytic cracking process comprising admixing a hydrocarbon oil feed with hot regenerated catalyst in the bottom section of a reactor riser, passing the mixture of the hydrocarbon oil feed and the catalyst through the riser, thereby at least partially volatilizing the oil feed and effecting cracking thereof at the process temperature under endothermic process conditions and deactivating the catalyst by deposition of carbonaceous deposits thereon, separating the deactivated catalyst from the cracked hydrocarbonaceous feed, passing the deactivated catalyst to a regenerator vessel wherein the carbonaceous deposits are removed from the deactivated catalyst under exothermic process conditions by means of a regenerating medium introduced into the regenerator vessel, and passing the regenerated hot catalyst substantially above process cracking temperature to the bottom section of the reactor riser; the improvement comprising continuously injecting liquid oil feed into a primary mixing zone in a venturi tube mixer spaced inwardly from the reactor riser wall at the bottom portion therein adjacent a regenerated catalyst return conduit; continuously passing a first portion of the hot regenerated catalyst into the venturi tube mixer sufficient to vaporize a major amount of oil feed without substantial cracking thereof; and passing a remaining second hot regenerated catalyst portion into the reactor riser through a passage between the venturi tube mixer and reactor riser wall, thereby mixing additional hot catalyst with vaporized oil feed to crack the oil feed in the reactor riser above the venturi tube mixer.

• Assignee: Mobil Oil Corporation
• Patent Number(s): US 4523987
• OSTI ID: 6366560
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
CATALYSTS
CATALYTIC CRACKING
CHEMICAL FEEDSTOCKS
CHEMICAL REACTIONS
CHEMICAL REACTORS
CRACKING
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
MIXERS
MIXING
PETROLEUM
PETROLEUM FRACTIONS
PYROLYSIS
REGENERATION
THERMOCHEMICAL PROCESSES
VENTURI TUBES
VISCOSITY