SOLUBILITY OF SOME N-ALKANES (C-23, C-25, C-26, C-28) IN HEPTANE, METHYLCYCLOHEXANE, AND TOLUENE

Solubilities of four heavy n-alkanes (tricosane, pentacosane, hexacosa ne, and octacosane) in a solvent containing seven atoms of carbon (hep tane, methylcyclohexane, and toluene) are determined by simple thermal analysis. It is shown that the nature of the solvent has no major inf luence on the solubility and that, in a same solvent, the solubility d ecreases when the carbon number of the alkane chain increases. Simple expressions are applied to represent the solubility lines, which revea ls that the binary mixtures are not ideal.