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Title: Process for preparing lubricating oil from used waste lubricating oil

Abstract

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.

Inventors:
 [1];  [1];  [1];  [1]
  1. Bartlesville, OK
Issue Date:
Research Org.:
BETC/ERDA
OSTI Identifier:
863012
Patent Number(s):
4073719
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10M - LUBRICATING COMPOSITIONS
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; 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/

Citation Formats

Whisman, Marvin L, Reynolds, James W, Goetzinger, John W, and Cotton, Faye O. Process for preparing lubricating oil from used waste lubricating oil. United States: N. p., 1978. Web.
Whisman, Marvin L, Reynolds, James W, Goetzinger, John W, & Cotton, Faye O. Process for preparing lubricating oil from used waste lubricating oil. United States.
Whisman, Marvin L, Reynolds, James W, Goetzinger, John W, and Cotton, Faye O. Sun . "Process for preparing lubricating oil from used waste lubricating oil". United States. https://www.osti.gov/servlets/purl/863012.
@article{osti_863012,
title = {Process for preparing lubricating oil from used waste lubricating oil},
author = {Whisman, Marvin L and Reynolds, James W and Goetzinger, John W and Cotton, Faye O},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {1}
}

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