Activity coefficients for two ternary systems: water-urea-tetramethylammonium bromide and water-urea-tetrabutylammonium bromide at 25.deg.

1969 ◽  
Vol 73 (9) ◽  
pp. 2895-2901 ◽  
Author(s):  
Wen-Yang Wen ◽  
Chun-Meei L. Chen
Keyword(s):  
Activity Coefficients ◽  
Tetrabutylammonium Bromide ◽  
Ternary Systems ◽  
Tetramethylammonium Bromide

Osmotic and activity coefficients for the CsF+methanol or ethanol+water ternary systems determined by potentiometric measurements

2012 ◽  
Vol 336 ◽  
pp. 34-40 ◽  
Author(s):  
Jing Tang ◽  
Lei Wang ◽  
Shu’ni Li ◽  
Quanguo Zhai ◽  
Yucheng Jiang ◽  
...  
Keyword(s):  
Activity Coefficients ◽  
Ternary Systems ◽  
Potentiometric Measurements

Activity Coefficients for CsBr + MeOH/EtOH + H2O Ternary Systems Using Potentiometric Measurements at 298.15 K

2012 ◽  
Vol 57 (9) ◽  
pp. 2603-2609 ◽  
Author(s):  
Yanping Du ◽  
Jing Tang ◽  
Shu’ni Li ◽  
Quanguo Zhai ◽  
Yucheng Jiang ◽  
...  
Keyword(s):  
Activity Coefficients ◽  
Ternary Systems ◽  
Potentiometric Measurements

Activities and activity coefficients in ternary systems

1953 ◽  
Vol 49 ◽  
pp. 237 ◽  
Author(s):  
H. A. C. McKay
Keyword(s):  
Activity Coefficients ◽  
Ternary Systems

scholarly journals Design Optimization of Deep Eutectic Solvent Composition and Separation Performance of Cyclohexane and Benzene Mixtures with Extractive Distillation

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1706
Author(s):  
Fang Bai ◽  
Chao Hua ◽  
Yongzhi Bai ◽  
Mengying Ma
Keyword(s):  
Tetrabutylammonium Bromide ◽  
Deep Eutectic Solvent ◽  
Ternary Systems ◽  
Deep Eutectic Solvents ◽  
Extractive Distillation ◽  
Molar Concentration ◽  
Molar Ratio ◽  
Coefficient Of Determination ◽  
Separation Performance ◽  
Equilibrium Data

Deep eutectic solvents (DESs) have properties that make them suitable candidates to be used as entrainers for extractive distillation. In the previous work, it was proven that DES(1:2) (tetrabutylammonium bromide: levulinic acid, 1:2, molar ratio) can break the cyclohexane-benzene azeotrope. In the present work, the HBA and HBD ratio and molar concentration of DES were optimized to obtain a better constitute and condition of DES to be utilized in cyclohexane and benzene extractive distillation. The physical properties and structure of the prepared DESs were characterized. Vapor–liquid equilibrium data of the ternary system (benzene + cyclohexane + DESs) were also measured at atmospheric pressure. All experimental equilibrium data were correlated with Wilson, nonrandom two-liquid (NRTL), and universal quasichemical (UNIQUAC) activity coefficient models, from which the coefficient of determination (R2) of the three pseudo-ternary systems fitting was calculated. From the obtained results, the best HBA and HBD ratio in the DESs is elucidated as 1:2, the best molar concentration of DES is 0.1, and the NRTL model predicts the experimental data more accurately than the Wilson and UNIQUAC models. From the derived mechanism, the formation of stronger hydrogen bond and π–π bond interactions between DES and benzene is obtained when HBA and HBD ratio in DES is 1:2. In other conditions, the azeotrope cannot be broken, or the efficiency is low. The present work provides an environmentally friendly method to separate aromatic/aliphatic mixtures and act as a guide for further study of DESs in extractive distillation.

Physical Interpretation of Solubility Interaction Constants from the Series Expansion of the Relative Activity Coefficients

1994 ◽  
Vol 59 (9) ◽  
pp. 1911-1921 ◽  
Author(s):  
Jaroslav Nývlt ◽  
Jitka Eysseltová
Keyword(s):  
Activity Coefficient ◽  
Series Expansion ◽  
Activity Coefficients ◽  
Physical Interpretation ◽  
Ternary Systems ◽  
Relative Activity ◽  
Solubility Data ◽  
Close Relationship ◽  
Insight Into ◽  
Saturated Solutions

Hydration analysis, which enables information on ionic processes in saturated solutions to be derived from solubility data in ternary systems, was applied to the interpretation of solubility interaction constants from the relative activity coefficient expansion. A close relationship was found between the hydration analysis parameters and the solubility interaction constants characterizing the relative activity of solute, which extends our insight into the ionic behaviour of the system studied by using the values of the interaction constants.

Studies of Activity Coefficients for Ternary Systems: Water + 18-Crown-6 + Alkali Chlorides at 298.15 K

2003 ◽  
Vol 32 (11) ◽  
pp. 951-966 ◽  
Author(s):  
Kesharsingh Patil ◽  
Dilip Dagade
Keyword(s):  
Activity Coefficients ◽  
Ternary Systems ◽  
Alkali Chlorides

scholarly journals DETERMINATION OF SELECTIVITY AND MASS TRANSFER IN LIQUID-PHASE EXTRACTION FOR BUTYL GLYCOL-WATER-ISOPROPYL ETHER SYSTEM

2020 ◽  
pp. 17-21
Author(s):  
A.A. Hasanov ◽  
Keyword(s):  
Activity Coefficients ◽  
Equilibrium Distribution ◽  
Ternary Systems ◽  
Selectivity Coefficient ◽  
Isopropyl Ether ◽  
Two Phases ◽  
The Given ◽  
Margules Equation ◽  
Ether System

The problems of phase equilibrium, the equilibrium distribution of a component between phases are considered, and the distribution coefficient is determined in two versions. A formula for determining the selectivity coefficient is obtained, equations relating the compositions of coexisting phases, by equating the activities in these phases, Margules constants are found. Based on the given content of the components, the numerical values of (Margules constant for A component in solvent S) and (Margules constant for S component in solvent A) were found Using the Margules equation for ternary systems, the activity coefficients of components A and B are determined in two phases. The experimentally obtained values of the molar fractions of each of the three components, responsible to different points of the binodal curve, the corresponding activity coefficients of component B, and also calculated on these coefficients of the activity values

scholarly journals STUDIES ON ACTIVITY COEFFICIENTS OF MIXED ELECTROLYTE SOLUTIONS——TERNARY SYSTEMS OF HCI-NiCI_2-H_2O

1979 ◽  
Vol 24 (17) ◽  
pp. 790-794
Author(s):  
忠恩 李 ◽  
德权 纪 ◽  
显华 万 ◽  
尚长 刘 ◽  
莲芬 李
Keyword(s):  
Activity Coefficients ◽  
Ternary Systems ◽  
Electrolyte Solutions ◽  
Mixed Electrolyte ◽  
Mixed Electrolyte Solutions
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