HETEROPOLYACID CATALYSTS AND BIODIESEL MANUFACTURING METHODS USING SUCH CATALYSTS

摘要

There is described a method of manufacturing biodiesel which comprises the esterif ication, transesterif ication or the substantially simultaneous esterif ication and transesterif ication of a feedstock comprising one or more vegetable oils, animal fats and/or mixtures thereof. The manufacturing method may include the use of a heteropolyacid as a catalyst. The preferred heteropolyacids comprise tungsten or molybdenum and a monovalent cation.