METHOD FOR PREPARING FATTY ACID ESTERS Russian patent published in 2009 - IPC C07C67/03 C11C3/10 C11C3/00 

FIELD: medicine.

SUBSTANCE: fatty acid esters are applied in manufacturing of, e.g. a pharmaceutical, dietary and cosmetic product, diesel fuel, as well as an intermediate product for making fatty alcohols, surface-active substances, lubricants by interesterification of fatty acid triglycerides of refined or unrefined natural oils containing free fatty acids, with lower monoatomic alcohols in stirring with alkali or earth metal hydroxide or alcoholate added as a catalyst at ambient temperature and atmospheric pressure. Then it is settled; heavy glyceric phase is removed, and water is added to remove impurities from ester phase through stirring, settling, and removing aqueous phase. Interesterification process including stirring, settling, separating the heavy glyceric phase, adding water for impurity removal in stirring, settling and removing aqueous phase is performed in a stirrer installation in a tank of variable filling level wherein a settling section is excluded from component reaction process, and the catalyst and alcohol are supplied in a circulation pattern, while removing the heavy phase and aqueous phase is performed through a drainage hole in the tank bottom. The mole ratio of initial fatty acid triglycerides of natural oil and lower monoatomic alcohol is 1:3 respectively.

EFFECT: improved method for preparing fatty acid esters.

6 dwg, 1 tbl, 10 ex