It refers to the method of extracting non removable components from oil, vegetable oil, microbial oil or common products of vegetable oil refining industry, including: (a) converting such oil, butter or common products into hydrogen alcohol solution, (b) extraction from a hydrogen alcohol solution, in which the fat part is separated from the non separable part by liquid / liquid extraction, and (b) by a solvent system consisting of five carbon atoms and one or two oxygen atoms, selected from methyl ketone and 2-heptabromide, Propionic acid, such as ethyl propionate,N-butyl isophenyl ester, propylene and their mixturesREFERIDA A UN METODO PARA EXTRAER UNA FRACCION INSAPONIFICABLE CONTENIDA EN UN ACEITE, EN UNA MANTECA VEGETAL, EN UN ACEITE DE UN MICROORGANISMO O EN UN CO-PRODUCTO DE LA INDUSTRIA DEL REFINADO DE LOS ACEITES VEGETALES, QUE COMPRENDE: a) TRANSFORMAR DICHO ACEITE, MANTECA O CO-PRODUCTO EN UNA SOLUCION HIDROALCOHOLICA, b) EXTRAER DE LA SOLUCION HIDROALCOHOLICA, EN LA QUE LA FRACCION GRASA ES SEPARADA DE LA FRACCION INSAPONIFICABLE MEDIANTE UNA EXTRACCION LIQUIDO/LIQUIDO, DONDE EL PASO b) SE EFECTUA EMPLEANDO UN SISTEMA DE DISOLVENTES QUE COMPRENDEN 5 ATOMOS DE CARBONO Y 1 O 2 ATOMOS DE OXIGENO, SELECCIONADOS DE METILCETONAS, 2-HEPTANONA, PROPIONATOS TALES COMO PROPIONATO DE ETILO, n-BUTILO E ISOAMILO, PROPILETERES Y SUS MEZCLAS