Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

In this investigation, by using the static equilibrium method, the solubility of 3-nitrophthalonitrile in twelve pure solvents namely n-propanol, methanol, ethanol, isopropanol, ethylene glycol (EG), acetone, toluene, N-methyl-pyrrolidone(NMP), n-butanol, ethyl acetate, isobutanol and water was gained through experiment over a temperature range from 278.15 K to 323.15 K under ambient pressure p = 101.2 kPa. The mole fraction solubility of 3-nitrophthalonitrile in above solvents increased as the temperature increased and had the following order in different solvents: NMP greater than acetone greater than ethyl acetate greater than EG greater than methanol greater than ethanol greater than toluene greater than n-propanol greater than isopropanol greater than n-butanol greater than isobutanol greater than water. The solubility was correlated by using the Wilson model, h equation, modified Apelblat equation and NRTL model. Results indicated that the maximum values of root-mean-square deviation and relative average deviation were 11.75x10-4 and 9.26x10-2 respectively. The relative average deviationvalues achieved with the modified Apelblat equation were lower than those with the other equations for a given solvent. Additionally, the mixing properties and reduced excess enthalpy andactivity coefficient under infinitesimal concentration were derived.