The second distillate side stream is dewaxed and sent to the engine lube oil pool.
It may also be blended with the heavier bottom side stream as heavy engine oil
stock. The bottom side stream is one of the base blending stocks for heavy engine
oils and the turbine oil stocks. To meet color and other specifications, these heavier
oils must be treated for the removal of undesirable components (such as heavy
Vacuum residue
Vacuum
dist. unit
Propane
de-asphalting
unit
Futural
extraction
plant
Hydrotreater
(Blocked operation)
MEX
dewaxing
Bitumen
blending
Bright stock
Bitumen
blowing
Secondary
distillation
tower
Atmos.
residue
Bright stock
HVGO
Asphalt
Heavy
spindle oil
Light
motor oil
grade
Light spindle oil
Heavy spindle oil
Light motor
oil grade
Wexes
Light lube
Blended bitumens
Heavy lube
Turbine
lube
oils
Heavy
engine
oil pool
Light
engine
oil pool
Spindle
oil pool
Finished product blending
and
packaging
Extract to REFY fuel
Light hydrocarbon
cutter stock
MVGO
LVGO
Fig. 16 A lube oil refinery configuration
Introduction to Crude Oil and Petroleum Processing
45