Abstract: A process for the transesterification of fat and/or oil of biological origin by means of alcoholysis comprises the following steps: provision in a vessel of fat and/or oil of biological origin to be transesterified, and implementation of alcoholysis by addition of an alkanol, in particular of a monohydric alkanol, and of a catalyst to the fat and/or oil that has been provided. with a view to eliminating the disadvantages of traditional transesterification processes, a metal salt of an amino acid or of an amino-acid derivative is used as catalyst, said metal salt being insoluble in alkanols.

Abstract: A process for the transesterification of fat and/or oil of biological origin by means of alcoholysis comprises the following steps:

Abstract: The invention concerns a method for producing fatty acid esters from fatty acid triglyceride and in particular from animal or vegetable fats and oils by transesterification with a monovalent low-molecular weight alcohol in the presence of a homogeneous or heterogeneous catalyst. In accordance with the invention, the formed fatty acid ester is extracted from the reaction mixture by means of a near-critical extractant. In this way fatty acid esters are obtained at high yield and excellent purity. As the extractant preferably a low pressure gas having a reduced temperature at 20° C. of about 0.7, preferably of equal to or greater than 0.7, is employed. Preferred extractants are carbon dioxide, propane, butane, dimethyl ether, ethyl acetate or mixtures thereof.