The solubilities of aniline hydrochloride ([HAE]Cl) in different aqueous solutions of methanol, ethanol, propan-1-ol, and their mixed solvent solutions were determined using the dynamic method in the temperature range between 288 K and 328 K. With the purpose of improving AspenPlus's prediction capability, in regards to [HAE]Cl solubilities in the CH(3)OH-C(2)H(5)OH-C(3)H(7)OH-H(2)O system at various temperatures, new interaction energy parameters tau([HAE]+-Cl-),(CH3OH)tau(CH3OH),([HAE]+-Cl-), tau([HAE]+-Cl-),(C2H5OH)tau(C2H5OH),([HAE]+-Cl-), and tau([HAE]+-Cl-),(C3H7OH)tau(C3H7OH,[HAE]+-Cl-) were obtained via regression of the experimental solubility of [HAE]Cl in binary mixed solvent systems with the maximum-likelihood principle. With the newly obtained electrolyte nonrandom two-liquid (NRTL) interaction parameters, a self-consistent model was established for the calculation of [HAE]Cl solubility in the system of CH(3)OH-C(2)H(5)OH-C(3)H(7)OH-H(2)O as a function of temperature and the composition of solvents. The maximum relative deviation between experimental and predicted solubility data is 2.3%, and the average relative deviation is 1.8 %.