Process for preparing lubricating oil from used waste lubricating oil
- Bartlesville, OK
A re-refining process is described by which high-quality finished lubricating oils are prepared from used waste lubricating and crankcase oils. The used oils are stripped of water and low-boiling contaminants by vacuum distillation and then dissolved in a solvent of 1-butanol, 2-propanol and methylethyl ketone, which precipitates a sludge containing most of the solid and liquid contaminants, unspent additives, and oxidation products present in the used oil. After separating the purified oil-solvent mixture from the sludge and recovering the solvent for recycling, the purified oil is preferably fractional vacuum-distilled, forming lubricating oil distillate fractions which are then decolorized and deodorized to prepare blending stocks. The blending stocks are blended to obtain a lubricating oil base of appropriate viscosity before being mixed with an appropriate additive package to form the finished lubricating oil product.
- Research Organization:
- BETC/ERDA
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4073719
- OSTI ID:
- 863012
- Country of Publication:
- United States
- Language:
- English
Similar Records
Process for preparing lubricating oil from used waste lubricating oil
Method for reclaiming waste lubricating oils
Related Subjects
preparing
lubricating
oil
waste
re-refining
described
high-quality
finished
oils
prepared
crankcase
stripped
water
low-boiling
contaminants
vacuum
distillation
dissolved
solvent
1-butanol
2-propanol
methylethyl
ketone
precipitates
sludge
containing
solid
liquid
unspent
additives
oxidation
products
separating
purified
oil-solvent
mixture
recovering
recycling
preferably
fractional
vacuum-distilled
forming
distillate
fractions
decolorized
deodorized
prepare
blending
stocks
blended
obtain
base
appropriate
viscosity
mixed
additive
package
form
product
oxidation products
lubricating oil
vacuum distillation
solvent mixture
waste lubricating
oxidation product
refining process
oil product
distillate fraction
distillate fractions
lubricating oils
liquid contaminants
/208/