FIELD: creation of vacuum in rectifying towers. SUBSTANCE: liquid working medium is fed to nozzle of liquid-gas jet apparatus as working medium at saturated vapor pressure not lower than pressure in vacuum rectifying tower. Pressure maintained in separator is equal to 1.1 to 160 pressures of vapor-and-gas phase of rectifying tower at jet apparatus inlet. After mixing of vapor-and-gas phase with liquid phase of working medium before feeding this mixture to separator but after escape of it from liquid-and-gas jet apparatus, process of condensation of easily condensable components of vapor-and-gas mixture is organized forming gas-and-liquid mixture. EFFECT: enhanced efficiency. 3 cl, 1 dwg
