| abstract |
What is proposed is a SPECTRA process for low-temperature fractionation of air, in which bottoms liquid from an additional second rectification column (12) used to obtain oxygen is evaporated in a second condenser-evaporator (121). In this second condenser-evaporator (121), gas that has been evaporated beforehand in a first condenser-evaporator (111), which is used for condensation of tops gas from a first rectification column (11), is condensed to the pressure level of the previous evaporation. The invention likewise provides a corresponding plant (100, 200, 300). |