الفهرس 
Treatment of used mineral oil based hydraulic fluids
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Abstract
In this work, properties of fresh and used hydraulic mineral oil samples were investigated according to ASTM D 6158. Then a simple methodology for dewatering and filtration was adopted. Cleaned oil samples were characterized. Additives that improve oil properties were added to cleaned oil with many different (A/O) ratios, to obtain the optimum concentration. All inhibitors at their optimum concentrations were added to oil samples. Inhibited oil samples are characterized. The results show that physical properties and some of chemical properties for oil samples are improved and return to required limit