Method of rerefining oil by distillation and extraction
Patent
·
OSTI ID:7214320
Used oil is rerefined by distilling it to remove a volatile forecut followed by a fraction of lubricating viscosity; the latter is then extracted with an immiscible liquid extractant to remove impurities. As optional preliminary steps, the oil may be diluted with a volatile diluent and insoluble impurities removed therefrom, and heated with an aqueous solution of a strongly alkaline material to concentrate metallic constituents (such as metal-containing additives) in a solid sludge. 15 claims.
- Assignee:
- Lubrizol Corp.
- Patent Number(s):
- US 4021333
- OSTI ID:
- 7214320
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020800* -- Petroleum-- Waste Management
DISTILLATION
ENERGY SOURCES
FOSSIL FUELS
FUELS
LUBRICANTS
LUBRICATING OILS
MANAGEMENT
MATERIALS RECOVERY
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM PRODUCTS
PROCESSING
PRODUCTION
RECOVERY
RECYCLING
SEPARATION PROCESSES
WASTE MANAGEMENT
WASTE OILS
WASTE PROCESSING
020800* -- Petroleum-- Waste Management
DISTILLATION
ENERGY SOURCES
FOSSIL FUELS
FUELS
LUBRICANTS
LUBRICATING OILS
MANAGEMENT
MATERIALS RECOVERY
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM PRODUCTS
PROCESSING
PRODUCTION
RECOVERY
RECYCLING
SEPARATION PROCESSES
WASTE MANAGEMENT
WASTE OILS
WASTE PROCESSING