Chao Cheng, Yang Cong, Cunbin Du
2017
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0
Influential Citations
8
Citations
Journal
The Journal of Chemical Thermodynamics
Abstract
Abstract In this work, the solubility of 4-nitrobenzaldehyde in methanol, ethanol, isopropanol, n -butanol, acetone, ethyl acetate, acetonitrile, 2-butanone, N , N -dimethylformamide, n -propanol and toluene was determined with the isothermal saturation method at the temperatures ranging from (273.15 to 313.15) K under atmosphere pressure. The mole fraction solubility increased with increasing temperature and obeyed the following order from high to low in the selected solvents except for acetonitrile: N , N -dimethylformamide > acetone > 2-butanone > ethyl acetate > methanol > toluene > ethanol > n -propanol > n -butanol > isopropanol. The results correlated with four models, which corresponded to the Apelblat equation, λh equation, Wilson model and NRTL model. The largest value of root-mean-square deviation ( RMSD ) was 11.53 × 10 −4 , and relative average deviation ( RAD ), 2.36%. The four thermodynamic models could all be employed to correlate the mole fraction solubility of 4-nitrobenzaldehyde in the selected solvents under studied conditions. In addition, the mixing Gibbs energy, mixing enthalpy, mixing entropy, activity coefficient at infinitesimal concentration ( γ 1 ∞ ) and reduced excess enthalpy ( H 1 E, ∞ ) were computed. The mixing process of 4-nitrobenzaldehyde in the solvents was spontaneous and endothermic. The acquired solubility and thermodynamic studies would be very helpful for optimizing the purification process and further study of 4-nitrobenzaldehyde.