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JOURNAL OF CHEMICAL AND ENGINEERING DATA · 2020 · IF 2.369

Solid–Liquid Equilibrium of Chlorpropamide in 14 Pure Solvents at Temperature of 283.15 to 323.15 K

Huimin Liu,Shui Wang,Chao Qu,Manman Li,Yixin Qu

In this paper, the solubility of chlorpropamide (CPA) in 14 solvents including 8 alcohols (ethanol, n-propanol, isopropanol, n-butanol, 2-butanol, iso-butanol, n-pentanol, and isopentanol) and 6 acetate esters (ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, amyl acetate, and methyl propionate) at temperatures of 283.15 to 323.15 K and atmospheric pressure was determined using a laser method. The solubility as a function of temperature was regressed using modified Apelblat, Van’t Hoff, λh, Wilson, and nonrandom two-liquid (NRTL) models. On the basis of the experimental and the simulation results, the mixing properties of the solutions, that is, mixing Gibbs energy, enthalpy, and entropy, were estimated.

CAS / MDL: 94-20-2

研究领域: 化学工程 · 药物化学

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FLUID PHASE EQUILIBRIA · 2016 · IF 1.846

Solubility of α-glycine in water with additives at a temperature range of (293.15–343.15) K: Experimental data and results of thermodynamic modeling

Hua Sun,Lu Wang,Baoshu Liu

The solubility of α-glycine in water with different additives (sodium nitrate, ammonium nitrate , ammonium sulfate , and ammonium chloride) was measured under atmospheric pressure across the temperature range of (293.15–343.15) K at intervals of 10.00 K using a dynamic laser method. Solubility was found to increase with increasing temperature and additive level. The experimental data were correlated with the modified Apelblat model, nonrandom two-liquid model (NRTL), and λh model. The R 2 of the fitting regression indicated good applicability of these models to the glycine solubility data in the studied systems ( R 2 > 0.99). Apparent standard enthalpy, entropy, and Gibbs free energy changes of the solution were calculated based on the van't Hoff equation to elucidate the dissolution mechanism. The results showed that the dissolving process of glycine was endothermic, and the main dissolution driving force contributor was enthalpy in all the additive + water systems studied. By means of enthalpy-entropy compensation analysis, a non linear Δ H sol Θ versus Δ G sol Θ enthalpy-entropy compensation plot with positive and negative slopes was obtained for the systems studied. The evaluated values of H E showed that the mixing process of α-glycine in all the systems studied was exothermic.

CAS / MDL: 56-40-6 7783-20-2 12125-02-9 7631-99-4

研究领域: 物理化学 · 热力学 · 材料科学

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Solid–Liquid Equilibrium of Chlorpropamide in 14 Pure Solvents at Temperature of 283.15 to 323.15 K

Solubility of α-glycine in water with additives at a temperature range of (293.15–343.15) K: Experimental data and results of thermodynamic modeling