SOLUBILITY OF ANTHRACENE AND PYRENE IN BINARY ALCOHOL PLUS ALCOHOL SOLVENT MIXTURES

Experimental solubilities are reported for anthracene dissolved in bin ary 1-octanol + 2-propanol, 2-butanol + 1-butanol, 1-octanol + 1-butan ol, 3-methyl-1-butanol + 1-propanol, and 2-methyl-1-propanol + 1-butan ol mixtures at 25 degrees C, and for pyrene dissolved in binary solven t mixtures containing 2-ethyl-1-hexanol with 1-propanol, 2-propanol, 1 -butanol, 2-butanol, 1-octanol, 2-methyl-1-propanol, and 3-methyl-1-bu tanol at 26 degrees C. Results of these measurements are used to test two mathematical representations based upon the combined nearly ideal binary solvent (NIBS)/Redlich-Kister equation and modified Wilson mode l. For the 12 systems studied, the combined NIBS/Redlich-Kister equati on was found to provide an accurate mathematical representation of the experimental data, with an overall average absolute deviation between measured and calculated values being on the order of 0.4%. Slightly l arger deviations were noted in the case of the modified Wilson equatio n.