Mineral oils: processes and products – Refining – Purifying used oil
Patent
1998-02-19
2000-05-30
Myers, Helane
Mineral oils: processes and products
Refining
Purifying used oil
208188, 208251R, C10M17500
Patent
active
060687592
ABSTRACT:
A process is provided for recovering lube oil base stocks from used lubricating oil formulations containing base oil stock and organo-metallic component which obviates preseparation of water and light hydrocarbons contaminants. The process comprises directly contacting used lubricating oil with a heated vapor, e.g., steam, under conditions which at least partially decompose the organo-metallic component and provide a desired volume of pumpable bottoms containing organo-metallic compound decomposition products and an overhead comprising gases and distillatable hydrocarbons, with no substantial carryover of metals into the overhead. The process may be carried out under conditions which minimize decomposition of high molecular weight additives such as VI improvers, to provide a bottoms fraction which may be added to asphalt or fuel oil. Also disclosed are an asphalt blend composition containing an asphalt component and the bottoms of the above process, and a pavement composition comprising aggregate and the asphalt blend composition.
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Doolin Patricia K
Malone Donald P
Moore Howard F
Zalewski David J
Hobbes Laurence P.
Marathon Ashland Petroleum LLC
Myers Helane
Stone Richard D.
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