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A batch reactor was constructed to obtain biodiesel from 5 liters of extracted from the seed of Ricinus communis. The reactor is made of stainless steel, 29cm length, 15.24 cm of inner diameter and a conical base of 20cm long, wall thickness of 0.2 cm, 1000 W tubular resistance and 110 volt motor. It is extracted and compared with the respective norms the physical and chemical properties of crude oil. Preliminary tests catalyzed transesterification of the oil with NaOH to verify the feasibility of the reaction and define the performed operational conditions. Obtained biodiesel was characterized and compared with references. The results showed that it is possible to obtain the biofuel in the batch reactor with a conversion 88%, confirming its application in transesterification reactions in a basic medium.