Liquid-liquid equilibria of alkane (C10/C12/C14)+1,4-diisopropylbenzene plus sulfolane at 323.15, 348.15 and 373.15 K

Tie line data have been determined at 323.15, 348.15 and 373.15 K for the t ernary liquid-liquid equilibria (LLE) of alkane (C10/C12/C14)+ 1,4-diisopro pylbenzene + sulfolane systems. The addition of 1,4-diisopropylbenzene to s ulfofane is found to increase the solubility of alkanes in the order of n-d ecane > n-dodecane > n-tetradecane and the relative mutual solubility of 1, 4-diisopropylbenzene is higher in n-decane + sulfolane than in n-dodecane sulfolane or n-tetradecane + sulfolane mixtures. The tie line data were co rrelated with the well-known UNIQUAC and NRTL models. The calculated equili brium mole fractions based on the UNIQUAC model are better than those based on the NRTL model. The values of selectivity and distribution coefficient were derived from the equilibrium data. (C) 1999 Elsevier Science B.V. All rights reserved.