Hydrocracking and recovering polynuclear aromatic compounds in slop wax stream

Patent · Tue Oct 06 00:00:00 EDT 1987

OSTI ID:5770131

Gruia, A J

This patent describes a catalytic hydrocracking process which comprises: (a) introducing a reduced crude into a fractionation zone to produce a vacuum gas oil stream having a propensity to form polynuclear aromatic compounds in a hydrocracking zone and a slop wax stream; (b) contacting the vacuum gas oil stream in a hydrocracking zone with added hydrogen and a metal promoted hydrocracking catalyst at elevated temperature and pressure sufficient to gain a substantial conversion to lower boiling products; (c) partially condensing the hydrocarbon effluent from the hydrocracking zone and separating the same into a low boiling hydrocarbon product stream and an unconverted hydrocarbon stream boiling above about 650/sup 0/F (343/sup 0/C) and containing trace quantities of polynuclear aromatic compounds; and (d) introducing at least a portion of the unconverted hydrocarbon stream containing polynuclear aromatic compounds into the fractionation zone thereby recovering a substantial portion of the polynuclear aromatic compounds in the slop wax stream which significantly minimizes the introduction of the polynuclear aromatic compounds into the hydrocracking zone.

• Assignee: UOP Inc., Des Plaines, IL
• Patent Number(s): US 4698146
• OSTI ID: 5770131
• Resource Relation: Patent File Date: Filed date 23 Jan 1986
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
AROMATICS
RECOVERY
PETROLEUM
FRACTIONATION
HYDROCRACKING
BOILING POINTS
CATALYSTS
CATALYTIC CRACKING
GAS OILS
HIGH TEMPERATURE
HYDROGEN
METALS
PRESSURE DEPENDENCE
SEPARATION PROCESSES
TEMPERATURE DEPENDENCE
VACUUM SYSTEMS
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
NONMETALS
ORGANIC COMPOUNDS
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PYROLYSIS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
020400* - Petroleum- Processing