Feed mixing technique for fluidized catalytic cracking of hydrocarbon oil

Patent · Tue Mar 25 04:00:00 EST 1986

OSTI ID:5668350

Chou, T S; Lee, C K

A fluid catalytic cracking process is described consisting of: 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 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 oxidizing conditions by means of a regenerating medium introduced into the regenerator vessel, and passing the regenerated hot catalyst through a regenerated catalyst return conduit substantially above process cracking temperature to the bottom section of the reactor riser. The improvement described here consists of: injecting oil feed into a primary mixing zone in a draft tube mixer; continuously passing a first portion of the hot regenerated catalysts into the draft tube mixer suffucuent 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 draft tube mixer and reactor riser wall and thereafter through the apertures, thereby mixing additional hot catalyst with vaporized oil feed to crack the oil feed in the draft tube mixer and in the remaining portion of the riser.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4578183
• OSTI ID: 5668350
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CHEMICAL REACTORS
CONTROL
CRACKING
DEACTIVATION
DECOMPOSITION
ENERGY SOURCES
EVAPORATION
FLUIDIZED BEDS
FOSSIL FUELS
FUELS
HYDROCARBONS
MIXERS
MIXING
ORGANIC COMPOUNDS
OXIDATION
PETROLEUM
PHASE TRANSFORMATIONS
PYROLYSIS
REGENERATORS
TEMPERATURE CONTROL
THERMOCHEMICAL PROCESSES