Free oil acid contents of the seeds , which are the raw meterial of oil , increase as result of various reasons both in Ripening Periods and the phases of producing crude oil .The removal of these free oil acids are necessary in terms of their consumption by people in a healthy way.
The most common method applied in deacidification method is the removal of sodium soaps, which are made up as result of saponification of free oil acids with sodium hydroxide , together with soapstucks.Neutralization process may be applied in systems running both continuously and discontinuously.Continuous systems are applied in neutralization phase as it is other phases in Nadir Oil Refinement Plants.The oil changed by a thermoregulator is mixed up with a required amount of alkali(according to stoichiometry).Soapstucks are formed as a result of this process and these soapstucks are distilled from neutral oil by means of high-speed centrifuge seperators.The soap cased in neutral oil is removed from oil by means of another seperator with the method of washing it up with water.