Solvent extraction process for rerefining used lubricating oil
In accordance with the present invention, a process is provided for removing impurities from heavy and light lube oil fractions that have been obtained from waste lubricating oil. The impurities in the light lube oil fraction are removed utilizing tetrahydrofurfuryl alcohol in an extraction column (10). An oilrich raffinate has the solvent removed therefrom by steam distillation and stripping at reduced pressure in a distillation tower (20). The heavy lube oil fraction is purified in a manner similar to the purification of the light lube oil fraction. The finished heavy and light lube oil may then be subjected to further treatment, such as polishing steps or additives may be blended into the lube oil product depending on the desired use.
- Assignee:
- Delta Central Refining Inc
- Patent Number(s):
- US 4302325
- OSTI ID:
- 5958774
- Resource Relation:
- Patent File Date: Filed date 28 Oct 1980
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
IMPURITIES
SOLVENT EXTRACTION
WASTE OILS
RECYCLING
WASTE PROCESSING
LUBRICATING OILS
ORGANIC OXYGEN COMPOUNDS
EXTRACTION
LUBRICANTS
MANAGEMENT
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PROCESSING
SEPARATION PROCESSES
WASTE MANAGEMENT
020800* - Petroleum- Waste Management
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management