TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The process is carried out at a temperature of 60-80 degrees C, at atmospheric pressure, and at a stirring speed of 100-300 rpm for 4 hours operating time. The extraction process takes place for 3 hours and transesterification process operation is carried out for 1 hour. The solution of methoxide is made by reacting methanol with 40-90 ml of potassium hydroxide (KOH) as solids in 0.05 to 0.16 g. The process of preparing solution of potassium methoxide is conducted at room temperature for 1 hour. The residual biomass separation is done by filtration using a Buchner funnel and at a pressure of 0.3-0.5 atm vacuum. The separation process is done with the biodiesel distillation process with the above conditions/peak set at a temperature of 60-80 degrees C. The biodiesel product is obtained as a bottom product. EXAMPLE - Biodiesel production was carried out as follows: 40 g of dried microalgae Chlorella species was extracted and was inserted into three-neck flask and added with 150 ml of n-hexane. The mixture was then heated to a temperature of 60-80 degrees C and stirred at a speed of 100-300 rpm. Extraction process in first step was held for 3 hours. A solution of potassium methoxide was prepared by reacting methanol with as many as 40-90 ml of 0.05 to 0.16 g of solid KOH in glass beaker. The process of making solution of potassium methoxide was continued until all the solids of KOH were dissolved for 1 hour. The potassium methoxide solution obtained in above step was added to the mixture. The process was continued until the stirring for 1 hour, at temperatures of 60-80 degrees C and at atmospheric pressure. The mixture was subsequently cooled to room temperature. Biodiesel was obtained by the separation of residual biomass and separation of residual reactants and solvent. Residual biomass (microalgae residual) was separated by filtered vacuum pressure. Vacuum process was carried out with the help of a vacuum pump to obtain a pressure of 0.3-0.5 atm. The screening process was carried out with filter paper with a Buchner funnel). The filtrate or liquid products obtained were put in a distillation column to separate methanol and biodiesel products from n-hexane. The process of distillation operations were carried out at a temperature of 60-80 degrees C, so that the solvent n-hexane and methanol was separated from the rest of the above product. The process of separation was held until all the products separately and there was no dripping from the condenser. The yield of biodiesel obtained was 11.47 to 53.25%.