Nre-refining of used lube oil pdf merger

Rerefining of used lubricating oil lube oil motor oil or engine oil is an oil used for lubrication of various internal combustion engines. Used lube oil is made up of a multitude of small individual batches collected at garages. Pdf the most important used oil recycling technology is the rerefining. Used lube oil used lube oil is defined as the petroleum derived or synthetic oil which remains after applications in lubrications, cutting purposes, etc. This means that the crude oil is heated in order that various distillates can be separated from one another. Therefore, the oil quality gradually decreases to a level that the used oil should be replaced by a new one. After a certain period of useful life, the lubricating oil loses its properties and cannot be used as such in machinery. Used lube oil rerefining 2 liters of used lube oil 1,5 liters of rerefined oil give used lube oil is generally a mixture of different types and grades of used lube oils, coming from motor crankcases and industry users. Gasoline 40 190oc kerosine 190 260oc diesel 260 330oc lube oil 330 400oc under vacuum the very heavy components of the crude i. Used lube oil is defined as the petroleum derived or synthetic oil which remains after applications in lubrications, cutting purposes, etc. Stp present used lube oil rerefining 25 anniversary.

Abstract oil and gas industries in nigeria mostly import base oils used in blending for the desired lubricants. Build up of temperature degrade the lubricating oil, thus leading to reduction in properties such as. Used lube oil is generally a mixture of different types and grades of used lube oils, coming from motor crankcases and industry users. Used lube oil is made up of a multitude of small individual batches collected at garages, maintenance shops, transportation companies and industries and depends on local situation. With increased time of uses, the lubricating loses its lubricating properties as a result of over reduction of desired. Viscosity, specific gravity, etc dirt and metal parts from the surfaces are also deposited into the lubricating oils. An oil which will normally boil at 500oc will boil at 300oc under the very high vacuum used. During normal use, impurities such as dirt, metal scrapings, water or chemicals can get mixed in with the oil or be generated in it due to thermal degradation or oxidation1.