Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

PP-V-6water removing. This method provides to produce OLA with degree of oligomerisation in therange n = 2-20; with yield up to 99% and specific capacity about 80-90 g (OLA)/(l×h).The best results on synthesis of lactide were obtained in the rotor film evaporator workingin the continuous flow regime. The process preferably was carried out in presence of catalyst(i.e. tin octoate) under vacuum (pressure = 12-15 torr) and temperature 220-225 °C. Thismethod provides to produce lactide with yield up to 88 % and specific capacity of reactor(concerning evaporation surface) 1.2 kg(lactide)/(m 2 ×h).ConclusionsThe three types of reaction units were examined for two reactions: oligomerisation oflactic acid and formation of lactide. The best reactor type and reaction condition wereexperimentally determined for both of processes.468