NOVELTY - Production of biodiesel involves combining oil or fat (12) with alcohol in presence of catalyst (16) to form mixture; heating mixture to above 100degrees C and raising pressure to above 100 psi; passing heated and pressurized mixture along a fluid flow path in which turbulent flow is induced to promote a chemical esterification reaction to provide mixture of biodiesel and glycerine (40); reducing pressure of mixture to atmospheric pressure and temperature to temperature lower than boiling point of alcohol at atmospheric pressure; and separating biodiesel and glycerine into separate phases.    USE - For the production of biodiesel (claimed).    ADVANTAGE - With a small bore, it is possible for pressure within the tube to reach as much as 3000psi such as from 300 to 500psi. This high pressure enables the various reagents and products of the reaction to remain liquid despite the high temperature. As a result, an esterification reaction proceeds at a significantly increased rate when compared to the prior art. The low viscosity of reagents at high temperature promotes mixing and further increases the rate of reaction. The presence of the projections induces the flow of liquid to move towards a center of the aperture and away from the walls of the parts. This leads to increased turbulence in the flowing stream of reactants in the process. In this way the mixing of the reactants is enhanced so that the chemical reaction proceeds more efficiently compared to a system where no turbulators are used.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an apparatus for production of biodiesel comprising a unit for mixing oil or fat with an alcohol and a catalyst to produce a reaction mixture; a unit for increasing the temperature of the reaction mixture to above 100degrees C; a unit for increasing the pressure of the reaction mixture to above 100 psi; an elongated fluid flow path; a unit for feeding the heated and pressurized reaction mixture along the elongated fluid flow path, where the fluid flow path being provided with unit to induce turbulent flow in the reaction mixture, so as to promote an esterification reaction to produce a reacted mixture of biodiesel and glycerine; and a unit for separating the reacted mixture into glycerine and biodiesel.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of a flow diagram for operation of the process.    oil or fat (12)    methanol (14)    methyl methylate catalyst (16)    heat exchanger (20)    reactor (22)    bore tube (24)    turbulators (25)    pressure reducing units (30)    glycerine. (40)