Comparative evaluation of new, used, and re-refined lubricating oils
Several samples of automotive lubricating oil produced from both new and used stocks were compared in chemical properties, including metals analysis, concentration of phosphorus, nitrogen, and sulfur; ash, acid number, and base number. Selected bench-scale tests were used to compare and evaluate the quality of these used, re-refined, and new motor oils. Most of the re-refined oils studied could not be distinguished from new oils by the laboratory tests. Samples produced in-house and included in this comparative evaluation were obtained by treating used oil by one of three techniques: (1) solvent precipitation; (2) vacuum distillation; and (3) combined solvent precipitation and vacuum distillation. The combined treatment effectively removed sludge and contaminants from the used oil without causing serious change in the hydrocarbon composition of the oil base stock. Reformulation of the re-refined oil with additives produced a lubricating oil comparable in quality to other oils of this study. 10 fig, 5 tables.
- Research Organization:
- Energy Research and Development Administration, Bartlesville, OK (USA). Bartlesville Energy Research Center
- OSTI ID:
- 7125760
- Report Number(s):
- CONF-750267-1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020800* -- Petroleum-- Waste Management
023000 -- Petroleum-- Properties & Composition
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
COMPARATIVE EVALUATIONS
DISTILLATION
LUBRICANTS
LUBRICATING OILS
MANAGEMENT
MATERIALS RECOVERY
OILS
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PRECIPITATION
PROCESSING
PURIFICATION
RECOVERY
RECYCLING
REFINING
SEPARATION PROCESSES
SOLVENTS
WASTE MANAGEMENT
WASTE OILS
WASTE PROCESSING