Re-refining of Waste Oil - Solvent Is Used in Treatment/Distillation Process
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چکیده
WASTE OIL RECOVERY. Prior to 1960, a significant portion of the demand for automotive lubricating oil was met by re-relined used oil. At the time, 150 re-refineries produced 300 million gal of motor oil annually. Since 1960, however, the production of re-refined oil has steadily declined. In 1981, for example, out of about 1.2 billion gal of automobile lubricating oil and 1.6 billion gal of industrial lubricating oils purchased, 25 U.S. rerefineries produced only 50 million gal. About 50% of the total amount purchased was lost in service, leaving 1.4 billion gal available for recovery.
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