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2. • The furfural extraction unit is a part of
a lube oil complex to produce lube
feed stock.
• It removes a certain amount of
aromatic compounds from the waxy
distillate feed so that the viscosity
index of the waxy distillate produced
in the MEK (methyl ethyl ketone) unit
is a minimum of 101 for 100 N waxy
distillate and 95 for 325N waxy
distillate.
• After the furfural extraction is a G-oil
unit, which is a low severity
hydrotreater removing sulfer from
the Raffinate feed produced by the
furfural unit.