Abstract
The behaviour of three binary mixtures benzene-n-heptane, n-heptane-n-propyl iodide and dodecane-quinoline, in a thermogravitational diffusion column have been studied. Results covering a wide range of initial composition are recorded. It has been found that the ideal parabolic curve relating separation and initial mixture composition is distorted; greater distortion occurring when "ring" compounds are present. The non-ideal behaviour is attributed to molecular "mobility" differences.
