recycled base oil

Discover how recycled base oils are re‑refined, their differences from virgin stocks, detection methods, odor, performance in lubricants, and impact on oil pricing.   Summary Re‑refining of used lubricants employs physical and chemical steps—vacuum distillation, solvent extraction, hydrotreating, acid‑clay treatment, thin‑film evaporation—to remove water, light ends, metals, polar compounds and aromatics. Among these, hydrotreating delivers […]