Improved process for producing esters from natural fats.

摘要

A description is given of an improved process for producing esters from natural fats (vegetable and animal fats) and from low molecular weight alcohols, in which the soaps and the oily compounds entrained in the alkaline phases are recycled by treating them, after acidification and separation, with a fraction of the glycerol phase produced, in the presence of an alkaline catalyst and in order to form at best a triglyceride or a partially substituted glyceride. This process makes it possible quantitatively to obtain methyl, ethyl, propyl or butyl esters which can be used as a substitute for gas oil.