Base oils are used to manufacture productsincluding lubricating greases, motor oil and metal processing fluids. Differentproducts require different compositions and properties in the oil. One of themost important factors is the liquid viscosity at various temperatures. Whether or not a crude oil issuitable to be made into a base oil is determined by the concentration of baseoil molecules as well as how easily these can be extracted.
Base oil is produced by means of refiningcrude oil. This means that the crude oil is heated in order that variousdistillates can be separated from one another. During the heating process,light and heavy hydrocarbons are separated the light ones can be refined to make petrol and other fuels, whilethe heavier ones are suitable for bitumen and base oils.
There are large numbers of crude oils allaround the world that are used to produce base oils. The most common one is atype of paraffinic crude oil, although there are also naphthenic crude oils thatcreate products with better solubility and very good properties at lowtemperatures. By using hydrogenation technology, in which sulfur and aromaticsare removed using hydrogen under high pressure, you can obtain extremely purebase oils, which are suitable when quality requirements are particularlystringent.
Chemical substances additives are added to the base oil in orderto meet the quality requirements for the end products in terms of, for example,friction and cleaning properties. Certain types of motor oils contain more thantwenty percent additives.
Besidesthe above information about the base oil, the waste oil can be distilled intobase oil, too. But usually the waste oil( such as waste black engine oil, motoroil, kinds of lube oil) which usually is distilled into SN150-SN300 by the oildistillation machines.