METHOD OF SEPARATING LIQUID MIXTURES BY RECTIFICATION Russian patent published in 2001 - IPC

FIELD: liquid mixture separation. SUBSTANCE: method involves enriching bottoms with volatile component by separating bottoms into different compositions by fractional condensation of respective part of vapor discharged from column in several dephlegmators. Bottoms fraction discharged from sequential dephlegmator has maximum concentration of high-volatile component. Bottoms fraction is supplied from column upper part and previous fractions are respectively supplied into column lower parts. Because bottoms fractions have higher content of volatile component than liquid in column at parts where fractions are introduced, vapor discharged from column has increased content of volatile component, and, respectively, distillate passed through dephlegmator has larger content of volatile component than distillate obtained with the same total consumption of bottoms produced in one dephlegmator. Method allows height of column to be reduced or reflux ratio to be decreased. EFFECT: increased efficiency in separating liquid mixtures by distillation method and reduced power consumption. 1 dwg