Process for the production of aromatic fuel
A process is described for the production of high octane gasoline component comprising the sequential steps of: A. Cracking carbometallic petroleum oil characterized by a Conradson Carbon content of at least 1.0 wt% and a metals content of at least 4 ppm Nickel Equivalents by weight in a riser cracking zone at cracking conditions in the presence of fluid cracking catalyst, B. recovering by distillation a light cycle oil fraction boiling in the range of about 216/sup 0/C to about 332/sup 0/C (about 430/sup 0/F to about 630/sup 0/F) and containing from about 10 vol. % to about 60 vol. % dual ring unsaturated aromatic hydrocarbons, C. contacting the fraction in the mixed phase in a saturation hydrogenation zone with a nickel-containing hydrogenation catalyst at selective conditions of temperature, pressure, space velocity and hydrogen circulation rate whereby at least 20-80 wt. % of the unsaturated aromatic hydrocarbons add hydrogen molecules to one of the rings to produce a partially saturated bicyclic hydrocarbon fraction, D. subjecting the partially saturated bicyclic hydrocarbon fraction to fluid catalytic cracking in a riser cracking zone at cracking conditions in the presence of with a zeolite fluid cracking catalyst and a metal passivator and in the absence of added hydrogen whereby rate of dehydrogenation is slowed sufficiently so that one ring of the bicyclic hydrocarbon rings cracks yielding monoaromatic hydrocarbons and, E. recovering from the monoaromatic hydrocarbons a gasoline component product characterized by an average octane of at least 91 and a monoaromatic hydrocarbon content in the range of 35 to 55 vol. %.
- Assignee:
- Ashland Oil, Inc., Ashland, KY
- Patent Number(s):
- US 4585545
- OSTI ID:
- 5600357
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
ALKANES
ANTIKNOCK RATINGS
AROMATICS
BOILING POINTS
CARBON
CATALYTIC CRACKING
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DEHYDROGENATION
DISTILLATION
ELEMENTS
FUEL OILS
FUELS
GASOLINE
HIGH TEMPERATURE
HYDROCARBONS
HYDROGENATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LIQUID FUELS
MATERIALS
MINERALS
NICKEL COMPOUNDS
NONMETALS
OCTANE
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
PYROLYSIS
QUANTITY RATIO
SATURATION
SEPARATION PROCESSES
SYNTHESIS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
ZEOLITES