Results 131 to 140 of about 768 (174)
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Prediction of Pharmaceutical Solubility Via NRTL-SAC and COSMO-SAC
Journal of Pharmaceutical Sciences, 2008Solid phase solubility is a fundamental parameter in the design of crystallization processes. The development and optimization of crystallization processes requires screening of numerous solvent systems for which the solubility of the compound of interest has to be measured as a function of temperature and solvent composition.
Hsien-Hsin, Tung +4 more
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The NRTL equation as a predictive tool for vapor–liquid equilibria
Fluid Phase Equilibria, 2004Abstract A simple modification of the NRTL equation proposed in a previous work is the basis for a new predictive method to calculate VLE of binary liquid systems. The only analytical modification of the NRTL consists in inserting the ratio of the molar volumes of the pure compounds as a multiplying factor of the binary parameters Gij and Gji ...
Alessandro Vetere
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Modeling aqueous multivalent polyelectrolytes systems with polyelectrolyte NRTL model
Journal of Molecular Liquids, 2021Abstract Thermodynamic modeling of aqueous polyelectrolyte systems is of great interest in many industrial applications and biological systems. Recently a Polyelectrolyte Nonrandom Two-Liquid activity coefficient model was proposed for aqueous monovalent polyelectrolyte systems.
Yuan Li, Yue Yu, Chau-Chyun Chen
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The prediction of the ternary liquid‐liquid equilibrium by means of the NRTL‐equation
Journal of Applied Chemistry and Biotechnology, 1977AbstractThe prediction of ternary liquid‐liquid equilibria by means of the NRTL‐equation and using the parameters obtained by the correlation of the limiting binary systems is examined. The predicted data are compared with experimental data for systems composed of an aromatic and an aliphatic hydrocarbon and sulpholane.
Raphaël M. De Fré, Lucien A. Verhoeye
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An a priori Analysis of Temperature Dependence of Wilson and NRTL Equations
Chemical Engineering Communications, 1975Abstract An a priori analysis of the Wilson and NRTL equations is carried out. The possibilities whether these equations are suitable for the simultaneous description of the excess Gibbs energy GE and the excess enthalpy HE are investigated. It follows from this analysis that the Wilson equation for strongly non-ideal solutions is not capable of ...
PETR VOŇKA +3 more
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Use of hydration and dissociation chemistries with the electrolyte–NRTL model
AIChE Journal, 1999AbstractSound theoretical understanding and accurate mathematical representation of electrolyte solution nonideality were the subject of extensive research efforts for decades. It is demonstrated that these goals can be achieved by incorporation of hydration and partial dissociation chemistries with the semi‐empirical electrolyte NRTL model.
Chau‐Chyun Chen +2 more
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On the calculations of azeotropes from the NRTL and UNIQUAC models
Fluid Phase Equilibria, 1993Abstract The local composition models of NRTL and UNIQUAC have been used in predicting of azeotropic data for binary and ternary liquid mixtures of various types. Activity coefficients have been calculated using the temperature dependent parameters of the models.
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A modified NRTL equation for the calculation of phase equilibrium of polymer solutions
Fluid Phase Equilibria, 1996A local composition model based on the lattice theory, which is a modified non-random two-liquid (NRTL) equation, is developed for the representation of the Helmholtz free energy of polymer solutions. A simple temperature dependence of the model parameters is introduced to account for the oriented interactions without changing the general formulation ...
You-Ting Wu +3 more
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Calculations of thermodynamic derivative properties from the NRTL and UNIQUAC models
Thermochimica Acta, 1997Abstract The local composition models NRTL and UNIQUAC with temperature-dependent parameters have been employed to calculate the surfaces of excess heat capacity, C E p , excess enthalpy, h E and thermodynamic factor, Γ for binary liquid mixtures. These thermodynamic properties represent the derivatives of the models with respect to temperature,
Demirel Y., Paksoy H.O.
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Correlation of heats of mixing of liquid mixtures by the NRTL model
Thermochimica Acta, 1993Abstract Using data for heats of mixing hE, the temperature-dependent parameters of the NRTL model have been estimated for 55 systems of binary liquid mixtures. In order to test the model thoroughly, systems of various types, including associating and partially miscible systems that have data for hE at more than one different isotherm, are considered.
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