Maristhela Passoni de Araújo MarinLuis NovazziDENARI, M. L.2023-08-262023-08-262014-11-16MARIN, M. P. A.; NOVAZZI, L.; DENARI, M. L. Transesterification of sunflower oil produced by solvent extraction. Sustainable Engineering Forum 2014 - Core Programming Area at the 2014 AIChE Annual Meeting, p. 558-562, nov. 2014.https://repositorio.fei.edu.br/handle/FEI/4924In this work, the leaching of oil from sunflower seeds using hexane was studied. The solution of oil / hexane was thereafter transesterified, with methanol and potassium hydroxide (KOH) as the catalyst, in a batch reactor, for 1 hour and with a constant temperature of 45 °C. It is important to point out that the extracted oil was not refined and was directly used on transesterification reactions. The hexane in the oil / hexane solution acted as a cosolvent and made the oil / methanol mixture forms a single-phase. Experimental results obtained in the transesterification reactions showed that the increase of methanol / oil mole ratio on reaction yield is negative, whereas the increase of catalyst concentration on reaction yield is positive. Reaction yields decreased 18.00% on average when the mole ratio methanol / oil was increased. When catalyst concentration was augmented, reaction yields increased 15.19%, on average. These results are statistically meaningful, since the standard deviation was equal to 0.48%. Moreover, an interaction between methanol / oil mole ratio and catalyst concentration on reaction yield was observed.Acesso RestritoArtigo de eventoBiodieselSolvent extractionSunflowerTransesterification