Extrusion was done by a single screw extruder (Model OMEGA 20, France) with a motor (0.75kW of puissance, 230V of maximal tension, 5.1 of maximal intensity), a screw length was 18 cm, a pitch screws of 1.8 cm, internal diameter was 1.4cm and 0.5cm deep channel and a sleeve of 2.5cm of internal diameter equipped with a filter pierced outlet of liquid at the end the screw and a surface of nozzles. The filter section was 2mmin diameter to separate extracted oil.