Recycling of Used Lubricating Oil Using Three Samples of Acidsudand Clay as a Method of Treatment

摘要

This research investigated the effect of three different acids (sulphuric acid, hydrochloric acid and nitric acid), on threeuddifferent clay deposit samples, to recycle used lubricating oil. To achieve this objective, filtration of the used oil was carriedudout first to remove impurities like: sand, metal chip and other micro impurities using: Buncher funnel, filter papers andudvacuum pump. The filtered oil was allowed to settle for twelve hours (12hrs), before being centrifuged for another 20minsudat 10000rpm so any particles in the oil can settle and be decanted. Next, the oil was preheated to degrade some additives,udwhich helped to reduce the work load when acid was added. 100ml of the preheated oil was measured and treated withud10ml of various acids (Sulphuric acid, Nitric acid and hydrochloric acid) in varied strengths, and then allowed to stand forudthirty minutes in a separating funnel before being allowed to pass through the bed of clay using a vacuum pump. CausticudSoda was then added to the extracted oil to help neutralize the acid in the oil. The resulting oil was slightly dark in colour.udTests carried out were: flash point, cloud point, pour point, viscosity index, sulphur content and water content. The resultudshow that compared with the standard value of fresh lube oil, the resultant oil from the analysis compared favourably. Anudappreciable increase in the flash point, cloud point, viscosity index, and sulphur content of the oil was noted whenudcompared to the fresh lube oil.