Phase Equilibria in the Water-Methyl Alcohol-Methyl tert-Butyl Ether-Ethylene Glycol System

1992 ◽  
Vol 57 (10) ◽  
pp. 2021-2041 ◽  
Author(s):  
Vladimír Kubíček ◽  
Jaroslav Matouš ◽  
Josef P. Novák
Keyword(s):  
Experimental Data ◽  
Ethylene Glycol ◽  
Phase Equilibria ◽  
Methyl Alcohol ◽  
Atmospheric Pressure ◽  
Quaternary System ◽  
Ternary Systems ◽  
Methyl Tert Butyl Ether ◽  
Butyl Ether ◽  
Good Agreement

Liquid-liquid equilibria were measured at 20 °C in the W-MeOH-MTBE-EG quaternary system (W is water, MeOH is methyl alcohol, MTBE is methyl tert-butyl ether, and EG is ethylene glycol) and in the W-MeOH-MTBE, W-MTBE-EG and MeOH-MTBE-EG ternary systems. In the W-MeOH-MTBE-EG, W-MeOH-MTBE, and MeOH-MTBE-EG systems, the vapour-liquid equilibria at atmospheric pressure were also measured. The experimental data of the quaternary system were compared with those modelled by superposition of the Wilson and Redlich-Kister equations with the ternary term, whose parameters were determined based on the corresponding binary and, in some cases, ternary systems. A very good agreement was obtained for both the liquid-liquid and vapour-liquid equilibria.

Liquid-Liquid Equilibrium in the Water-Methyl tert-Butyl Ether-Nitromethane-Ethylene Glycol System

1993 ◽  
Vol 58 (5) ◽  
pp. 983-995
Author(s):  
Vladimír Kubíček ◽  
Josef P. Novák ◽  
Jaroslav Matouš
Keyword(s):  
Ethylene Glycol ◽  
Quaternary System ◽  
Calculated Data ◽  
Ternary Systems ◽  
Methyl Tert Butyl Ether ◽  
Liquid Equilibrium ◽  
Butyl Ether ◽  
Tert Butyl ◽  
Ternary Parameters

The liquid-liquid equilibrium was measured at 20 °C in the title quaternary system and in the three nitromethane-containing ternary subsystems. The data were compared with those predicted by a superposition of the Wilson and Redlich-Kister equations including the ternary parameters. The agreement between the observed and calculated data is very good both for the quaternary system and for the three ternary systems.

scholarly journals A thermodynamic description of metastable c-TiAlZrN coatings with triple spinodally decomposed domains

2017 ◽  
Vol 53 (2) ◽  
pp. 85-93 ◽  
Author(s):  
J. Zhou ◽  
L. Zhang ◽  
L. Chen ◽  
Y. Du ◽  
Z.K. Liu
Keyword(s):  
Experimental Data ◽  
Phase Equilibria ◽  
First Principles ◽  
Thermodynamic Description ◽  
Quantitative Description ◽  
Experimental Phase Equilibria ◽  
Free Energies ◽  
Calphad Technique ◽  
Important Input ◽  
Good Agreement

A critical thermodynamic assessment of the metastable c-TiAlZrN coatings, which are reported to spinodally decompose into triple domains, i.e., c-TiN, c-AlN, and c-ZrN, was performed via the CALculation of PHAse Diagram (CALPHAD) technique based on the limited experimental data as well as the first-principles computed free energies. The metastable c-TiAlZrN coatings were modeled as a pseudo-ternary phase consisting of c-TiN, c-AlN and c-ZrN species, and described using the substitutional solution model. The thermodynamic descriptions for the three boundary binaries were directly taken from either the CALPHAD assessment or the first-principles results available in the literature except for a re-adjustment of the pseudo-binary c-AlN/c-ZrN system based on the experimental phase equilibria in the pseudo-ternary system. The good agreement between the calculated phase equilibria and the experimental data over the wide temperature range was obtained, validating the reliability of the presently obtained thermodynamic descriptions for the c-TiAlZrN system. Based on the present thermodynamic description, different phase diagrams and thermodynamic properties can be easily predicted. It is anticipated that the present thermodynamic description of the metastable c-TiAlZrN coatings can serve as the important input for the later quantitative description of the microstructure evolution during service life.

Excess enthalpies of some (1-propanol + methyl tert-butyl ether + C6-hydrocarbon) ternary systems at 298.15 K

1994 ◽  
Vol 72 (4) ◽  
pp. 1111-1115 ◽  
Author(s):  
Shemin Zhu ◽  
Shubao Shen ◽  
George C. Benson ◽  
Benjamin C.-Y. Lu
Keyword(s):  
Ternary Systems ◽  
Methyl Tert Butyl Ether ◽  
Excess Enthalpies ◽  
Butyl Ether ◽  
Tert Butyl ◽  
Calorimetric Measurements

Calorimetric measurements of excess enthalpies are reported for the three ternary systems (1-propanol + methyl tert-butyl ether + (n-hexane, or 2,3-dimethylbutane, or cyclohexane)) at 298.15 K. Smoothing equations, fitted to the results, were used to construct constant enthalpy contours on a Roozeboom diagram for each of the systems.

Evaluation of the Thermodynamic Properties and Phase Equilibria of the Ordered γ’ and Disordered γ Phases in the Ni-Al-Ta System

2002 ◽  
Vol 755 ◽  
Author(s):  
Shihuai Zhou ◽  
Long-Qing Chen ◽  
Rebecca A. MacKay ◽  
Zi-Kui Li u
Keyword(s):  
Experimental Data ◽  
Thermodynamic Properties ◽  
Gibbs Energy ◽  
Phase Equilibria ◽  
Phase Diagrams ◽  
Gibbs Energy Function ◽  
Ternary Interaction ◽  
Two Phases ◽  
Rich Side ◽  
Good Agreement

ABSTRACTThe phase equilibria and thermodynamic properties of the ternary Ni-Al-Ta system on Ni-rich side were analyzed. Thermodynamic descriptions of the liquid, γ-fcc, γ'-L12, and π-Ni6AlTa phases were obtained using the CALPHAD (CALculation of PHase Diagrams) technique. The thermodynamics of γ-fcc and γ'-L12 phases were modeled with a single Gibbs energy function taking into account the crystallographic relation between the two phases. The ternary interaction parameters of the liquid and fcc phases were also determined. The calculated phase diagrams of the ternary Ni-Al-Ta system show a good agreement with experimental data.

scholarly journals Phase Behavior at High Pressure of the Ternary System: CO2, Ionic Liquid and Disperse Dye

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Helen R. Mazzer ◽  
José C. O. Santos ◽  
Vladimir F. Cabral ◽  
Claudio Dariva ◽  
Marcos H. Kunita ◽  
...  
Keyword(s):  
Experimental Data ◽  
Carbon Dioxide ◽  
High Pressure ◽  
Phase Behavior ◽  
Ternary Systems ◽  
High Pressure Phase Behavior ◽  
Phase Transition Pressure ◽  
Binary And Ternary Systems ◽  
Pressure Phase ◽  
Good Agreement

High pressure phase behavior experimental data have been measured for the systems carbon dioxide (CO2) + 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim] [PF6]) and carbon dioxide (CO2) + 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim] [PF6]) + 1-amino-2-phenoxy-4-hydroxyanthraquinone (C.I. Disperse Red 60). Measurements were performed in the pressure up to 18 MPa and at the temperature (323 to 353 K). As reported in the literature, at higher concentrations of carbon dioxide the phase transition pressure increased very steeply. The experimental data for the binary and ternary systems were correlated with good agreement using the Peng-Robinson equation of state. The amount of water in phase behavior of the systems was evaluated.

Thermodynamic Calculation of the Heavy Rare Earth Permanent Magnets: Fe-RE (RE=Gd, Tb, Dy, Lu) Binary Systems

2017 ◽  
Vol 1142 ◽  
pp. 62-68
Author(s):  
Xiao Long Chen ◽  
Jiang Wang ◽  
Tai Li Chen ◽  
Mao Hua Rong ◽  
Guang Hui Rao ◽  
...  
Keyword(s):  
Experimental Data ◽  
Magnetic Properties ◽  
Phase Equilibria ◽  
Binary Systems ◽  
Permanent Magnets ◽  
Ternary Systems ◽  
Calphad Method ◽  
Experimental Investigations ◽  
Heavy Rare Earth ◽  
Microstructure And Magnetic Properties

The Fe-RE (RE=Gd, Tb, Dy, Lu) binary systems with the experimental data of phase equilibria and thermodynamic properties in the published literature were reviewed firstly. Based on available phase equilibria data and thermodynamic data, the Fe-RE (RE=Gd, Tb, Dy, Lu) binary systems were assessed thermodynamically using the CALPHAD method. As a result, further experimental investigations and thermodynamic calculations would be both required in order to develop thermodynamic database of the RE-Fe-B ternary systems, which is very useful to study the relations between alloy compositions, microstructure and magnetic properties of novel Nd-Fe-B-based permanent magnets.

scholarly journals Solid-liquid phase equilibria of (H2O-Mn(H2PO2)2-MnCl2-NaCl), (H2O-Mn(H2PO2)2-MnCl2) and (H2O-NaCl- MnCl2) systems at 323.15 K

2020 ◽  
pp. 59-59
Author(s):  
Vedat Adiguzel ◽  
Wei Liu ◽  
Asadullah Memon ◽  
Hongtao Zhou ◽  
Imran Akbar ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Phase Equilibria ◽  
Quaternary System ◽  
Invariant Point ◽  
Solid Phase ◽  
Ternary Systems ◽  
Invariant Curves ◽  
Saturation Method ◽  
Solid Liquid ◽  
Liquid And Solid Phases

The solid-liquid phase equilibria (SLE) and densities of H2O-NaCl- -MnCl2-Mn(H2PO2)2 quaternary system, H2O-NaCl-MnCl2 and H2O-MnCl2- -Mn(H2PO2)2 ternary systems were investigated at 323.15 K by the isothermal solution saturation method. The analyses of the liquid and solid phases were used to determine the composition of the solid phase using the Schreinemakers graphic method. The ternary systems contain one invariant point, two invariant curves and two crystallization regions. In the quaternary system, there is one invariant point, three invariant curves, and three crystallization areas corresponding to NaCl, MnCl2 4H2O, and Mn(H2PO2)2H2O. The crystallization area of Mn(H2PO2)2 H2O, being the largest in comparison with those of other salts, occupied 80.75 % of the total crystallization area.

Sign in / Sign up

Export Citation Format

Share Document