Hydrocracking process
This patent describes a catalytic hydrocracking process which comprises: (a) contacting a hydrocarbon feed having a propensity to form polynuclear aromatic hydrocarbon compounds in a hydrocracking zone with added hydrogen and a metal promoted crystalline zeolite hydrocracking catalyst; (b) condensing the hydrocarbon effluent from the hydrocracking zone. Then, separating the same into a low boiling hydrocarbon product and unconverted hydrocarbon oil containing small quantities of polynuclear aromatic hydrocarbon compounds; (c) contacting at least a portion of the unconverted hydrocarbon oil containing polynuclear aromatic compounds with a catalyst which contains elemental iron and one or more of an alkali or alkaline-earth metal, or compound thereof. The contacting taking place in the presence of hydrogen, at conditions inclusive of temperatures sufficient to hydrogenate and hydrocrack the polynuclear aromatic hydrocarbon compounds; and (d) recycling unconverted hydrocarbon oil having a reduced concentration of polynuclear aromatic compounds resulting from step (c) to the hydrocracking zone.
- Assignee:
- Exxon Research and Engineering Co., Florham Park, NJ
- Patent Number(s):
- US 4618412
- OSTI ID:
- 5043915
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AROMATICS
BOILING POINTS
CATALYSTS
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ELEMENTS
HIGH TEMPERATURE
HYDROCARBONS
HYDROCRACKING
HYDROGENATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IRON
MATERIALS
METALS
MINERALS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
POLYCYCLIC AROMATIC HYDROCARBONS
PRESSURE DEPENDENCE
PYROLYSIS
QUANTITY RATIO
RECYCLING
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
ZEOLITES