DEVICE AND METHOD FOR ELIMINATING BIODIESEL BY-PRODUCT, METHOD FOR PURIFYING BIODIESEL FROM TRANSESTERIFICATION STEP, AND BIODIESEL PRODUCTION PLANT INCLUDING THE SAME

摘要

A device and method for removing a by-product of biodiesel from a transesterification step, said by-product being either an alcohol, especially methanol or ethanol, or water, comprising a stripping column with atmospheric pressure preferentially connected to a "cryogenic trap" type exchanger. The invention also relates to a biodiesel purification process resulting from a transesterification step and a biodiesel production facility including said device and allowing the implementation of said methods.