Effects of NaOH and Ethanol on the Solubility of Disodium Decanedioate in Water

Abstract

To investigate the effects of NaOH and ethanol on the solubility of disodium decanedioate in water, the solubilities of disodium decanedioate in two aqueous solutions (aqueous NaOH solutions and aqueous ethanol solutions) were determined in a temperature range of (284 to 345) K. The solute-free mole fraction of NaOH and ethanol in the solvent mixtures extended from 0 to 0.084 and 0 to 0.472, respectively. With the increase of the mole fractions of ethanol (or NaOH) in solvent mixtures, the solubilities decreased obviously. Alcohol-out and alkali-out phenomena could be evidently observed, between which the alkali-out effect was more prominent. The determined data were correlated with the new electrolyte nonrandom two-liquid (E-NRTL) model, and the root-mean-square deviations of solubility temperature varied from (0.26 to 0.91) K.

Solubility of Dimethyl Terephthalate and Monomethyl Terephthalate in the Methanol Aqueous Solution and Its Application To Recycle Monomethyl Terephthalate from Crude Dimethyl Terephthalate

“…The solubilities of DMT and MMT were determined by a dynamic method, which has been described in detail previously. , Briefly, predetermined sample (weighed by the analytical balance, Gibertini, Crystal200, Italy, with an accuracy of ±0.0001 g) was heated slowly at a defined rate (0.2 K·h –1 ). A refrigerated/heating circulator (Julabo FP45-HE, Germany, temperature stability ±0.01 K) was used to control the temperature of the sample, and the temperature was measured by a platinum resistance thermometer (PT-100), which was calibrated with an accuracy of ±0.01 K. When the last crystal in the sample disappeared, the temperature was taken as the equilibrium dissolution temperature.…”

Measurement and correlation of solubility of 4-chloro-2,5-dimethoxynitrobenzene and 4-chloro-2,5-dimethoxyaniline in methanol, ethanol, xylene and toluene

“…The apparatus and procedure have been described in detail previously [16]. The predetermined mixture of the solute and solvent (weighed by the analytical balance, Gibertini, Crystal200, Italy, with an accuracy of 0.1 mg) was heated slowly at a heating rate which would be less than 0.2 K Á h À1 at a temperature near the SLE temperature with continuous stirring inside a jacketed vessel.…”

Solubility and Thermodynamic Behavior of Veramoss in Different Pure Solvents and {Ethanol + Water} Mixtures from T = 283.15 to 333.15 K

“…The suspension solutions were detected by the laser monitoring system. Although many studies ,− used a laser monitoring system, sometimes a laser cannot examine the crystal, having some errors. In order to improve the accuracy of the experimental data, we measure the solubility for three times.…”