Re-Refining Process Overview
Lube base oils are the most valuable constituents in crude oil.
Virgin lube oils are recovered from so-called lube crudes by
solvent extraction followed by wax (i.e. paraffin) removal. To
enhance color and stability, the raw lube is catalytically
hydrotreated. Average crude oils have 3-8% lube content, whereas
lube crudes typically have 12-16% lube content. This compares with
60-75% recoverable lube content in spent automotive oils, which if
burned or dumped would mean the loss of a valuable natural
resource.
PROCESS OVERVIEW - Used lube oil, collected by our specialized
trucks and technicians from garages, car dealers, service stations,
etc., is brought to the re-refining plant. The used oil is then
processed to yield lube base stocks, fuel oil and asphalt flux.
The proprietary EVERGREEN-CEP Re-Refining Process is a six step procedure consisting of:
- Pre-Treatment
- Water and Light Fraction Removal
- Fuel Oil Fraction Removal
- Separation of Lube by Distillation
- Conversion of Lube Distillate through Hydrotreatment to Base Stock
- Splitting of Base Stock into Desired Cuts through Fractionation
