A method for preventing sterol glycoside-containing precipitates in the production of fatty acid alkyl esters

摘要

A method for preventing or eliminating sterol glycoside-containing precipitates in the production of fatty acid alkyl esters by transesterification of fats or oils with alkyl alcohols, wherein the fats or oils and the alkyl alcohols and a catalyst in at least one reaction stage with a mixing reactor and a separator in a light, ester-rich phase and separating a heavy, glycerol-rich phase and separating fatty acid alkyl esters from the light, ester-rich phase, characterized in that a strong organic or strong inorganic acid with the fat or oil prior to transesterification and / or the crude alkyl ester produced by transesterification and / or is brought into contact after removal of by-products and drying biodiesel end product and that the fats or oils glycerol is added.