
180 Refining Used Lubricating Oils
TABLE 7.12
Phillips Petroleum Process: US Patent 4,151,072: Operating Conditions
Embodiment 1
Unit Typical Value Approx. Preferred Range
Heater 1 for
feedstock
Temperature: 160°C 60°C–200°C
Pressure: 215psia (1.5MPa-a) Atmospheric to 250psia (1.72MPa-a)
Treating agent Mass ratio agent to oil: 0.01:1 0.005:1 to 0.05:1
Contactor 1 Temperature: 160°C 60°C–200°C
Pressure: 215psia (1.5MPa-a) Atmospheric to 250psia (1.72MPa-a)
Time: 30 min 10 min to 2 h
Stripper 1 Top
Temperature: 160°C 60°C–200°C
Pressure: 16psia (110kPa-a) 20 to 2psia (138–13.8kPa-a)
Bottom
Temperature: 115°C 60°C–200°C
Pressure: 16psia (110kPa)