Abstract: A continuous, non catalytic process for producing biodiesel from vegetable oils and ethanol or methanol includes pumping a mixture of vegetable alcohol through a pump towards a tube shaped reactor, wherein the mixture is submitted to high pressure and temperature, where the resulting product is non reacted alcohol, glycerin and a mixture of esters (biodiesel) which is directed to the reservoir at the reactor outlet where an upper phase of alcohol is redirected through an alcohol return pipe to the pump inlet, and the intermediate phase, biodiesel, and the lower phase (mostly of glycerin) are led to the separation reservoir or decantation tank, where the alcohol is removed through the alcohol return pipe, being biodiesel and glycerin the final products, which are then collected for the end to which they were aimed.

Abstract: The aim of this patent is a basically cylindrical vertical body where the displacement of grains occurs through gravity. It is constituted by an antechamber (01) through which the grains enter and are pre-heated when they come in contact with an amount of parallel tubes (02), heated by steam. In the lower part of the chamber (01), there is an entry rotational valve (11) through which the grains pass to the heating chamber (18).