Method for reclaiming waste lubricating oils

Patent · Sat Dec 31 23:00:00 EST 1977

OSTI ID:863013

Whisman, Marvin L ^[1]; Goetzinger, John W ^[1]; Cotton, Faye O ^[1]

---

1. Bartlesville, OK

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.

• Research Organization: BETC/ERDA
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4073720
• OSTI ID: 863013
• Country of Publication: United States
• Language: English

Related Subjects

/208/
additives
agents
antioxidants
butanol
causes
containing
contaminants
conventional
corrosion
corrosion inhibitors
decolorization
deodorization
desludged
detergents
distillation
distilling
dried
extreme
extreme pressure
followed
inhibitors
isopropanol
ketone
layer
liquid
liquid contaminants
low-boiling
lubricating
lubricating oil
lubricating oils
method
methylethyl
mixture
move water
oil
oil refining
oils
oils containing
oxidation
oxidation product
oxidation products
preferably
pressure
products
purifying
reclaiming
recovery
refining
remove
remove water
separation
sludge
solid
solvent
solvent mixture
steps
subjected
treating
unspent
vacuum
waste
waste lubricating
water