The solubility of naproxen in binary mixtures of polyethylene glycol 200 (PEG 200) + water at the temperature range from 298.0 K to 318.0 K were reported. The combinations of Jouyban-Acree model + van’t Hoff and Jouyban-Acree model + partial solubility parameters were used to predict the solubility of naproxen in PEG 200 + water mixtures at different temperatures. Combination of Jouyban-Acree m...

The complexation reactions between 4-(2-pyridy1azo)-resorcinol and Cd ,H g and Pb io ns have been investigated in acetonitrile-dimethyEomamide mixtures at various temperatures using a spectrophotometric technique. The stoichiometry and the formation constants of the complexes formed in solution were calculated by computer refinement of absorbance-mole ratio data using nonlinear least-square ...

The solubility of acetaminophen and ibuprofen in binary and ternary mixtures of N-methyl pyrrolidone, polyethylene glycol 600 and water at 25 °C were determined and the solubilities are mathematically represented by the Jouyban–Acree model. The density of the solute-free solvent mixtures was measured and employed to train the Jouyban–Acree model and then the densities of the saturated solutions...

During the preparation of multi-component model membranes, a primary consideration is that compositional homogeneity should prevail throughout the suspension. Some conventional sample preparation methods pass the lipid mixture through an intermediary, solvent-free state. This is an ordered, solid state and may favor the demixing of membrane components. A new preparative method has been develope...

Five solutions of sodium chloride in mixtures of water and dimethyl sulphoxide ͑DMSO͒ have been simulated using the conventional molecular dynamics technique. The potentials of mean force ͑PMFs͒ of the sodium chloride ion pair in the presence of the five water–DMSO mixtures with DMSO mole fractions (x DMSO) of 0.10, 0.21, 0.35, 0.48 and 0.91 have been computed. The derived PMFs have been confirmed ...

Solute-solute and solute-solvent clustering of N,Ndimethylaminobenzonitrile and ethyl N,N-dimethylaminobenzoate in supercritical fluoroform, supercritical carbon dioxide, and supercritical fluoroform-carbon dioxide mixtures are quantitatively evaluated from the dependence of the relative contributions of the locally excited (LE) state and the twisted intramolecular charge transfer (TICT) emissi...

We have investigated the solvation shell dynamics of Na and Cl ion pairs in water DMSO mixtures of three compositions with xDMSO (mole fraction of DMSO) = 0.21, 0.35 and 0.48. Dynamical ion pair trajectories in these compositions are studied to analyze the diffusional behaviour of the solvent molecules in the primary and secondary solvation shells as well as the bulk solvent. As expected, the d...

A complete description of the Supercritical Antisolvent Process requires the modelling of several complex physical phenomena such as heat and mass transfer, hydrodynamic, phase equilibria of ternary mixtures, and nucleation /growth of the specie to be precipitated; moreover, the description should also account for the biphasic case, where the jet of organic solvent breaks up as droplets. As a f...

The solubility of polymers can be significantly altered by the use of solvent mixtures. The solvent composition also effects the self-assembly properties of amphiphilic copolymers. In addition, water–ethanol mixtures are known to exhibit abnormal physicochemical properties due to the presence of hydration shells around the ethanol molecules, while at the same time both solvents have very low to...

Solvent extraction using organic solvents is an important technology for the purification of wet process phosphoric acid (WPA). In this study, the purification process of WPA, using a new type of solvent extraction system, cyclohexanol diluted in kerosene, was investigated. The equilibrium phase diagram of the system H3PO4 H2Osolvent mixtures at 313.2K was obtained. The effects of extraction ...