Mineral oils: processes and products – Refining – Purifying used oil
Patent
1993-11-15
1995-09-05
Lieberman, Paul
Mineral oils: processes and products
Refining
Purifying used oil
208 18, 208184, C10G71000, C10M17500
Patent
active
054476283
ABSTRACT:
A used lubricating oil comprising lube oil additives, including zinc dithiophosphate is reconstituted. Zinc dithiophosphate is thermally decomposed at a temperature of 400.degree. F. (204.degree. C.) to 1000.degree. F. (538.degree. C.) for a residence time of 10 to 120 minutes. The resulting oil is subjected to vacuum distillation. A zinc-free (i.e. ash free by ASTM D-482) oil is stabilized by catalytic hydrogenation or clay treating to produce a lubricating oil blending stock. About 5 to 25 vol % is recovered as a metal containing bottoms product, useful as asphalt extender. The process is carried out in the absence of chemical demetallizing.
REFERENCES:
patent: 2319750 (1943-05-01), Schonberg et al.
patent: 4073719 (1978-02-01), Whisman et al.
patent: 4151072 (1979-04-01), Nowack et al.
patent: 4333822 (1982-06-01), Tkac et al.
patent: 4381992 (1983-05-01), Wood et al.
patent: 4512878 (1985-04-01), Reid et al.
Bond Bruce R.
Gorneau Arthur G.
Harrison Charles W.
Steinberg Robert M.
Bailey James L.
Hailey Patricia
Lieberman Paul
Morgan Richard A.
Priem Kenneth R.
LandOfFree
Reconstituting lubricating oil does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reconstituting lubricating oil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reconstituting lubricating oil will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-470590