Method for reclaiming waste lubricating oils

Patent · Mon Feb 13 23:00:00 EST 1978

OSTI ID:6792217

Whisman, M L; Goetzinger, J W; Cotton, F O

A method for purifying and reclaiming used lubricating oils containing additives such as detergents, antioxidants, corrosion inhibitors, extreme pressure agents and the like and other solid and liquid contaminants by preferably first vacuum distilling the used oil to remove water and low-boiling contaminants, and treating the dried oil with a solvent mixture of butanol, isopropanol and methylethyl ketone which causes the separation of a layer of sludge containing contaminants, unspent additives and oxidation products. After solvent recovery, the desludged oil is then subjected to conventional lubricating oil refining steps such as distillation followed by decolorization and deodorization.

• Assignee: Dept. of Energy
• Patent Number(s): US 4073720
• OSTI ID: 6792217
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020800 -- Petroleum-- Waste Management
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
DISTILLATION
LUBRICANTS
LUBRICATING OILS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PURIFICATION
RECYCLING
SEPARATION PROCESSES
WASTE OILS