Used 18,000 BPD Furfural Plant built in 1977. 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.
The original process was designed by TEXCO. The plant was upgraded in 1989.