ABSTRACT The effective separation of binary mixtures by distillation is related to the rate (kinetics) of the mass-exchange process and it is determined by three groups of factors: design and size of the tray, hydrodynamic conditions of the motion of the two phases on the tray and the physicochemical properties of the separated mixture. The aim of the present study is to obtain experimental data about the number of transferred units and the total volume coefficient of mass-exchange in the distillation of two model mixtures, Ethyl alcohol-Water and Tetrachloromethane-Toluene, using a laboratory single-sieve tray column at atmospheric pressure and total reflux. The results obtained were processed to determine the phase resistances caused by the rectification of the mixtures studied.
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