Catalytic cracking of vegetable oils to produce biofuels has been studied (Pioch et al., 1993). Copra oil and palm oil stearin were cracked over a standard petroleum catalyst SiO2/Al2O3 at 450°C to produce gases, liquids and solids with lower molecular weights. The condensed organic phase was fractionated to produce biogasoline and biodiesel fuels. The chemical compositions (heavy hydrocarbons) of the diesel fractions were similar to fossil fuels. The process was simple and effective compared with other cracking processes according to the paper. There was no waste water or air pollution.