Design and evaluations - Import export

Scientists and chemical engineers still measure phase equilibria despite the significant improvement in theoretical evaluations. Therefore, our phase equilibrium apparatus is part of the standard equipment in chemical engineering laboratories. The vapourliquid equilibrium of binary and multicomponent mixtures constitute an essential basis for the determination of the theoretical plates necessary for the evaluation of separation processes. Although VLEdata are known from literature, there is still an increasing tendency towards redetermining equilibrium data by experiments, because the thermodynamic parameters like pressure, temperature and concentrations are different or inadequate. For designing e.g. extractive distillation processes the evaluation of vapourliquidliquid phase equilibria (VLLEdata) are required. The practical measurement and determination of these data proves difficult with the standardised VLEunits because of the phase formation of the liquids.