Hydrocracking process with polycyclic aromatic dimer removal

Patent · Tue Aug 03 04:00:00 EDT 1993

OSTI ID:6416656

Fetzer, J C; Rosenbaum, J M; Bachtel, R W; Cash, D R; Lammel, D G

A process for selectively removing stable polycylic aromatic dimers present in hydrocracker effluents from a hydrocarbonaceous feedstock comprising: (a) feeding a hydrocarbonaceous feedstock to a hydrocracker to produce a light effluent stream and a heavy effluent stream comprising lighter polynuclear aromatics and stable polycyclic aromatic dimers; (b) contacting at least a portion of the heavy effluent stream with a light paraffinic stream to precipitate a majority of the stable polycyclic aromatic dimer and maintain in solution a majority of the lighter polynuclear aromatics to produce a blended stream containing polycyclic aromatic dimer precipitate; and (c) separating and withdrawing from the blended stream at least a portion of the precipitate containing stable polycyclic aromatic dimer while the hydrocracker is on-stream.

• Assignee: Chevron Research and Technology Co., San Francisco, CA (United States)
• Patent Number(s): A; US 5232577
• Application Number: PPN: US 7-567427
• OSTI ID: 6416656
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKANES
AROMATICS
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DIMERS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
HYDROCRACKING
ORGANIC COMPOUNDS
PETROLEUM
POLYCYCLIC AROMATIC HYDROCARBONS
PRECIPITATION
PYROLYSIS
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
VISCOSITY