Integrated extraction and transesterification process forbiodiesel production from Jatropha Curcas (JCL) seeds using hexane and methanol via base catalyzed transesterificationis reported in this paper.The effects of reaction time, catalyst dose, liquid to solidratio, type of solvent and grain size of JCL seeds onbiodiesel production were investigated. It was found thathexane played the role of both co – solvent and co – extractantwhich enhanced the efficiency of oil extraction and facilitated mass transfer. The highest biodiesel yield (90.8%) was obtained at hexane to seed ratio of 5:1 (vol /wt), methanol to seed ratio 1:1 (vol /wt), activated Ca O of 1% by wt of seeds, stirring speed 700 rpm, temperature of 70°C at reaction time 6 hours
