Solubility Modeling and Mixing Properties for Benzoin in Different Monosolvents and Solvent Mixtures at the Temperature Range from 273.15 to 313.15 K

Abstract

In the present work, the benzoin solubility in ethanol, methanol, n-propanol, isopropyl alcohol, n-butanol, acetone, ethyl acetate, acetonitrile, cyclohexane, butyl acetate, isobutyl alcohol, and toluene and ethyl acetate + ethanol solvent mixtures was measured by using the static method at the temperature range from 273.15 to 313.15 K under atmospheric pressure (101.1 kPa). The solubilities in mole fraction increased with increasing temperature and followed the order from high to low in the selected monosolvents: ethyl acetate > acetone > butyl acetate > (acetonitrile, toluene) > methanol > ethanol > n-propanol > n-butanol > isobutyl alcohol > isopropyl alcohol > cyclohexane; and for the ethyl acetate + ethanol mixture, the mole fraction solubilities of benzoin increased with the increase in temperature and ethyl acetate mass fraction. The obtained solubility of benzoin in neat solvents was correlated with the Apelblat equation, λh equation, and Wilson and NRTL models; and in solvent mixtures of ethyl acetate (w) + ethanol (1 – w), with the Jouyban–Acree, van’t Hoff–Jouyban–Acree and Apelblat–Jouyban–Acree models. The largest value of root-mean-square deviation was 4.02 × 10–4, and relative average deviation was 2.36 × 10–2. Furthermore, the mixing enthalpy, mixing Gibbs energy, mixing entropy, activity coefficients under infinitesimal concentration (γ1 ∞), and reduced excess enthalpy (H 1 E,∞) were deduced.

Solubility, Three-Dimensional Hansen Solubility Parameters, and Solution Thermodynamics of 3,3′-Diaminodiphenyl Sulfone in 14 Neat Solvents from 283.15 to 328.15 K

“…The infinite-dilution activity coefficient (γ 1 ∞ ) and reduced excess enthalpy ( H 1 E, ∞ ) are estimated by − …”

Equilibrium Solubility Determination and Dissolution Property Analysis of 5,6-Dimethoxy-1-indanone in 15 Pure Solvents from 283.15 to 323.15 K

“…The meaning of g ij is the energy parameter of the interaction between i and j molecules; the parameter α ij is related to the nonrandomness in the mixture, and when α ij is zero, the mixture is completely random. 25,26 The value of α can be set according to different types of solutions. 4, the solubility of 5,6-dimethoxy-1indanone increases along with the rise of temperature in all selected solvents.…”

“…Based on the concept of local composition, the NRTL (non-random two liquids) equation is proposed to correlate the thermodynamic data of various fluids as well as calculate thermodynamic properties and phase equilibria. , The NRTL equation is given as eqs – The meaning of g ij is the energy parameter of the interaction between i and j molecules; the parameter α ij is related to the nonrandomness in the mixture, and when α ij is zero, the mixture is completely random. , The value of α can be set according to different types of solutions.…”

4-Chloro-2-nitroaniline Solubility in Several Pure Solvents: Determination, Modeling, and Solvent Effect Analysis

“…The equilibrium 4-chloro-2-nitroaniline solubilities in pure solvents are mathematically described via the Apelblat, − λ h , − Wilson − and nonrandom two-liquid (NRTL) models. − Additionally, the solvent effect on the 4-chloro-2-nitroaniline solubility in the studied solvents was studied by using the Kamlet–Taft linear solvation energy relationship …”

“…This equation is very appropriate for describing mathematically the mole fraction solubility of a solid in different solvents. This equation is expressed as − Herein, x refers to the 4-chloro-2-nitroaniline solubility in mole fraction in the different monosolvents at temperature T /K. A , B , and C are denoted as parameters of the Apelblat equation.…”