Binary Diffusion Coefficients of Organic Compounds in Hexane, Dodecane, and Cyclohexane at 303.2-333.2 K and 16.0 MPa

Binary diffusion coefficients for infinitely dilute solutions of acetone, benzene, toluene, m-xylene, 1,3,5-trimethylbenzene, and naphthalene in hexane, in dodecane, and in cyclohexane were measured from 303.2 to 333.2 K and at 16.0 MPa using the Taylor dispersion technique. In addition, the measurements for o- and p-xylenes, vitamin K sub(3), linoleic acid methyl ester, indole, dl-limonene, vitamin A acetate, vitamin E, and vitamin K sub(1) in hexane and vitamin K sub(3) and linoleic acid methyl ester in dodecane were made at the limited conditions. The D sub(12) results in the three solvents are expressed by the equation D sub(12)/T identical with alpha eta super( beta ) with average absolute deviation of 5.2%, where eta is the solvent viscosity and alpha and beta are constants related to the solute molar volume at the normal boiling point. For the D sub(12) measured in this study this correlation is as accurate as Nakanishi's correlation which is superior to other correlations examined.