Journal ArticleDOI
Measurement and Modeling of Refractive Indices for Multicomponent Chromium Compound Solutions
TLDR
In this article, a molecular thermodynamic model of refractive indices for aqueous solutions of chromium compounds is proposed, based on the author's molecular model for solution structure and an equation for the excess enthalpy of a binary solution obtained from the experimental measurements.Abstract:
The aim of this work is to solve the key problems of the green production process for chromium trioxide and to study the thermodynamic properties of corresponding solutions. The refractive indices of quaternary mixtures (chromium trioxide + potassium chromate + potassium dichromate + water) have been measured from 298.15-333.15 K. A molecular thermodynamic model of refractive indices for aqueous solutions of chromium compounds is proposed, based on the author's molecular model for solution structure and an equation for the excess enthalpy of a binary solution obtained from the experimental measurements. The model parameters are confirmed and quantitative equations for the variation of the model parameters with temperature and the molality of potassium dichromate in the mixed solvent are established. The data predicted by the model are in good agreement with the experimental results.read more
Citations
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Journal ArticleDOI
Modeling of the Refractive Index for the Systems MX+H2O, M2X+H2O, H3BO3+MX+H2O, and H3BO3+M2X+H2O. M = K+, Na+, or Li+ and X = Cl− or SO42−
TL;DR: In this paper, the authors modeled the refractive index for binary aqueous solutions of boric acid, sodium, potassium, lithium, chloride, and sulfate ions with water molecules.
References
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Journal ArticleDOI
Use of mixing rules in predicting refractive indexes and specific refractivities for some binary liquid mixtures
TL;DR: In this paper, the applicability of the Lorenz-Lorenz, Gladstone-Dale, Wiener, Heller, and Arago-Blot refractive index mixing rules was evaluated.
Journal ArticleDOI
Surface tensions and refractive indices of (tetrahydrofuran +n -alkanes) atT =298.15 K
TL;DR: In this article, the authors used the Lorentz-Lorenz, Dale-Gladstone, Eykman, Oster, Arago-Biot, and Newton equations to predict the excess molar volumes from the refractometric measurements, as well as a modified version of the Oster equation with a parameter obtained for each binary system from data for dn/dT, dρ ǫ/ǫ dT, and ρ for the pure components.
Journal ArticleDOI
Green manufacturing process of chromium compounds
TL;DR: A green manufacturing process of chromium compounds has been developed by the Institute of Process Engineering, Chinese Academy of Sciences in Beijing, China as mentioned in this paper with the design objective of eliminating pollution at the source.
Journal ArticleDOI
Density, refractive index and speed of sound for mixtures of ethyl acetate with 2-butanol and 3-methyl-1-butanol: Vapor–liquid equilibrium of the ethyl acetate + 3-methyl-1-butanol system
TL;DR: In this paper, the Redlich-Kister polynomials were used to predict the activity coefficients of the NRTL, UNIQUAC, and Wilson equations.
Journal ArticleDOI
LDA‐Measurements in a Stirred Tank With a Liquid‐Liquid System at High Volume Percentage Dispersed Phase
TL;DR: In this article, a model of two refraction index matched immiscible liquids is presented along experimental velocity vector fields of the continuous phase that utilises the non-intrusive Laser-Doppler-Anemon technique.
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