Inventia se refera la o instalatie pentru transesterificarea in doua trepte a acizilor grasi si poate fi utilizata la obtinerea combustibilului pentru motoarele cu ardere interna. Instalatia pentrutransesterificarea in doua trepte a acizilor grasi include rezervoare pentru ulei vegetal si catalizat de metanol, capacitati pentru decantarea produselor reactiei si conditionarea esterului, pompe-dozatoare (3, 4, 5), la iesirea fiecareia dintre ele fiind instalat un omogenizator pasiv hidraulic corespunzator (6, 7, 8) ca un tub cu ambele capeteinchise cu dopuri avand doua racorduri de intraresi unul de evacuare, fiecare dintre ele fiind dotat cu o rondela centrifuga, iar iesirea fiecarui omogenizator pasiv (6, 7, 8) este unita cu intrarea unui omogenizator activ corespunzator (9, 10, 11); pompe de inalta presiune (12, 13), traductoare de presiune (22, 23) si ale nivelului de glicerina (34, 35, 36); capacitatea pentru decantarea produselor reactiei include un corp (1), divizat in doua rezervoare cilindrice coaxiale cu un fund comun, in rezervorul central cu functia de schimbator de caldura (24) sunt montate reactoare (16, 17), iesirea fiecarui reactor este unita cu un dispozitiv corespunzator de scurgere (18, 19), iar rezervorul periferic prin intermediul unor pereti verticali, sudati dupa diametrul cilindrului, este divizat in doua capacitati egale (25, 26) pentru decantarea produselor reactiei dupa prima si a doua trepte de transesterificare, in fiecare dintre capacitatile mentionate sunt instalate rezervoare de receptie (14, 15) si de scurgere (20, 21) a produselor reactiei; capacitatea pentru conditionarea esterului consta dintr-un corp (2) divizat in trei rezervoare cilindrice coaxiale cu un fund comun, un rezervor central (28), executat ermetic si destinat pentru deshidratarea esterului rectificat, in care etajat, in rand si coaxial sunt montate farfurii dedoua tipuri: in forma de trunchi de con perforatsi in forma de con, farfuriile de primul tip suntamplasate cu baza mai mica in jos, iar de tipul al doilea cu conul in sus si sunt unite intre ele prin intermediul unor suporturi, totodata lungimea suportului, care uneste farfuria inferioara cu fundul rezervorului (28), este mult mai mare decat celelalte, in partea superioara a rezervorului central (28) este montat un dispozitiv pentru pulverizarea lichidului (45), iar in fund un robinet pentru scurgerea lichidului, un rezervor intermediar - schimbator de caldura (29), un rezervor periferic divizat prin peretii verticali, sudati dupa diametrul cilindrului, in doua capacitati egale (30, 31), destinate pentru decantarea esterului dupa rectificare.The invention relates to an installation for the two-stage transesterification of fatty acids and can be used to obtain fuel for internal combustion engines. The installation for the two-stage transesterification of fatty acids includes tanks for vegetable oil and methanol catalyst, capacities for decanting the reaction products and ester conditioning, dosing pumps (3, 4, 5), at the output of each of them being installed a suitable passive hydraulic homogenizer. (6, 7, 8) as a tube with both ends closed with plugs having two inlet connections and one outlet, each of them being equipped with a centrifugal washer, and the outlet of each passive homogenizer (6, 7, 8) is joined to the inlet a suitable active homogenizer (9, 10, 11); high pressure pumps (12, 13), pressure transducers (22, 23) and glycerin levels (34, 35, 36); The capacity for decanting the reaction products includes a body (1), divided into two cylindrical tanks coaxial with a common bottom, in the central tank with the function of heat exchanger (24) are mounted reactors (16, 17), the output of each reactor is connected with a suitable drain device (18, 19), and the peripheral tank by means of vertical walls, welded to the diameter of the cylinder, is divided into two equal capacities (25, 26) for decanting the reaction products after the first and second transesterification stages, in each of the mentioned capacities is installed receiving tanks (14, 15) and draining tanks (20, 21) of the reaction products; the ester conditioning capacity consists of a body (2) divided into three coaxial cylindrical tanks with a common bottom, a central tank (28), hermetically executed and intended for dehydration of the rectified ester, in which layered, row and coaxially plates are mounted two types: cone-shaped perforated and cone-shaped trunks, the plates of the first type are placed with the lower base down, and of the second type with the cone upwards and are joined together by means of supports, also the length of the support, which connects the lower plate with the bottom of the tank (28), is much larger than the others, in the upper part of the central tank (28) is mounted a device for spraying liquid (45), and in the bottom a valve for draining liquid, an intermediate tank - heat exchanger (29), a peripheral tank divided by vertical walls, welded to the diameter of the cylinder, in two equal capacities (30, 31), intended for for decanting the ester after rectification.