TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The neutralization step involves use of alcohol tank, methoxide preparation tank, storage tank for raw oil or waste oil with high content of FFA, NOBA reactor where neutralization and separation operations occur at same reactor, raw glycerin storage tank, tonsiling unit, alcohol recovery unit, filter press unit and storage tank for filtered oil and removed from its free fat acid. In the two-part reactor, glycerin separation is performed. The catalyst is dissolved in hot glycerin. The resulting soap is removed from reaction medium by use of glycerin. For the separation of glycerin, stagnant zone is formed. The method involves heating of the division where glycerin is collected. The glycerin is removed from the reaction medium by several steps. In NOBA reactor variable mixing speeds are used. EXAMPLE - After glycerin collecting part (B1) of NOBA reactor was filled with neutral oil, canola oil (10 kg) having 1% free fatty acids (FFA) content in main reactor block (A1) and heated at constant temperature of 60 degrees C. Potassium hydroxide of 0.221% (90% purity) (wt./wt. oil) was dissolved in methanol (50 ml) and added to the oil and reaction was realized in 75 rev./minute. After reaction time of 15 minutes, glycerin of 275 g (5 wt./wt.% oil) (95% purity) was added to the reaction medium and glycerin was allowed for 20 minutes to precipitate in the part (B1). Soap and acid test analysis were conducted in the reaction. After these analysis, it was observed that FFA content of neutralized oil reduced from 1% to 0.24% and FFA removal efficiency was 76%. It was also observed in the soap test conducted 15 minutes after start of the reaction, 4832 mgKOH soap/g sample soap was in the reaction medium and after precipitation of glycerin added for purpose of removal of soap thus formed from the reaction medium, sample soap was detected to be present in the medium in amount of 362 mgKOH soap/g sample. At the end of the reaction, oil taken as 10 kg at the beginning remained 9.85 kg, with 1.5% loss of efficiency. When another reactor used other than NOBA by use of same reagents, loss of efficiency was 3% and it was 4.7% for classical refining operations.