The System Acetic Acid-Triethylamine

Klooster, H. S. van; Douglas, W Agnew

doi:10.1021/j150440a002

Cited by 22 publications

(13 citation statements)

References 1 publication

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“…The LLE data points determined in this study at a temperature of 50°C (z A = 0.44 and 0.89) are plotted for comparison. They are in better agreement with the values reported by van Klooster and Douglas [32].…”

supporting

confidence: 92%

“…This was also theoretically predicted by ab initio calculations for the trimethylamine-formic acid and propylamine-propionic acid systems [22,30]. The ionic nature of the complexes was confirmed by both mid and near infrared spectroscopy [20,21,[24][25], FT-Raman [17], 1 H-NMR and 13 C-NMR [15,31], dielectric spectroscopy, conductivity measurements [18,23], melting and boiling point measurements, ultrasound absorption and relaxation spectroscopy [12,24,[32][33], and combinations of different measurement techniques including density, optical refractive index, and shear viscosity [23].…”

Section: Introductionsupporting

confidence: 65%

“…1 shows the phase diagram for TEA-acetic acid mixtures at 1 atmosphere using the overall amine mole fraction (z A ) as composition descriptor. It summarizes previously reported liquid-liquid equilibrium (LLE) and vapor-liquid equilibrium (VLE) phase composition data for TEA-acetic acid mixtures [12,32]. The LLE data of Kohler and coworkers [12] and van Klooster and Douglas [32] deviate at higher amine concentrations.…”

mentioning

confidence: 53%

“…It summarizes previously reported liquid-liquid equilibrium (LLE) and vapor-liquid equilibrium (VLE) phase composition data for TEA-acetic acid mixtures [12,32]. The LLE data of Kohler and coworkers [12] and van Klooster and Douglas [32] deviate at higher amine concentrations. The LLE data points determined in this study at a temperature of 50°C (z A = 0.44 and 0.89) are plotted for comparison.…”

mentioning

confidence: 53%

“…Klooster and Douglas [32] previously found that no molecular interaction occur at 162 °C in the TEA-acetic acid system. The present vapor phase spectra were recorded at an even higher temperature and both components should therefore be present in their monomer forms.…”

Section: Dsc Resultsmentioning

confidence: 96%

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TGA–FTIR study of the vapors released by triethylamine–acetic acid mixtures

2012

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Proprietary mixtures of amines and carboxylic acids are used as volatile corrosion inhibitors (VCIs) for the protection of iron and steel components against atmospheric corrosion. This study was focused on the nature of the vapors they release. VCI model compounds comprising mixtures of triethylamine and acetic acid were studied using thermogravimetric analysis coupled with Fourier-transform infrared spectroscopy (TGA-FTIR) at 50°C. As vaporization progressed, the composition of the remaining liquid and the emitted vapor con v erged to a f i xed ami ne con ten t of ca. 27 m ol e percen t. Thi s was j ust ab ov e th e composition expected for the 1:3 amine to carboxylic acid complex. Mixtures close to this composition also featured the lowest volatility.

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supporting

confidence: 92%

Section: Introductionsupporting

confidence: 65%

mentioning

confidence: 53%

mentioning

confidence: 53%

Section: Dsc Resultsmentioning

confidence: 96%

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TGA–FTIR study of the vapors released by triethylamine–acetic acid mixtures

2012

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Optimization of reactive extraction of C1–C4 aliphatic monocarboxylic acids from aqueous solutions: modeling solvation effect with extended‐LSER, A‐UNIFAC and SPR

Şenol

Çehreli

Özparlak

et al. 2017

Asia-Pacific J Chem Eng

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This paper studies reactive extraction of formic (FA), acetic (AA), propionic (PA) and butyric (BA) acids from aqueous solutions by tri‐n‐butyl amine/diluent, with particular focus on proper optimization and modeling of extraction equilibria. The uptake capacities of amine/diluent and diluent alone approximate the following order: oleyl alcohol > octyl acetate > diisobutyl ketone and BA > PA > AA ≈ FA. An intrinsic optimization structure has been applied to the description of optimum extraction field of relevant systems, based on analyzing the variation profiles of separation ratio R and synergistic enhancement SE factors through the derivative variation method. We present new solvation molecular models extended‐linear solvation energy relation (e‐LSER), SPR1 and SPR2 (solvation probability relation), and an extension to group‐contribution approach A‐UNIFAC (Association‐UNIFAC). A‐UNIFAC predicts phase equilibria using new group interaction parameters regressed from vapor‐liquid equilibrium data. The e‐LSER model involves eight descriptors used for expressing solvent effects. By performing SPR1 and SPR2, we are able to scale up the probability range and activation energy of solvation effect. The strength of acid‐amine association is calculated with chemodel. e‐LSER, A‐UNIFAC, SPR and chemodel simulate accurately the observed performance with average deviations inferior to 4.8%, 24.1%, 0.8% and 16.2%, respectively. © 2017 Curtin University and John Wiley & Sons, Ltd.

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3 Binary Mixtures: References

Wohlfahrt¹

Static Dielectric Constants of Pure Liquids and Binary Liquid Mixtures

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The System Acetic Acid-Triethylamine

Cited by 22 publications

References 1 publication

TGA–FTIR study of the vapors released by triethylamine–acetic acid mixtures

TGA–FTIR study of the vapors released by triethylamine–acetic acid mixtures

Optimization of reactive extraction of C1–C4 aliphatic monocarboxylic acids from aqueous solutions: modeling solvation effect with extended‐LSER, A‐UNIFAC and SPR

3 Binary Mixtures: References

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