Solvent Effects in Extraction of Carboxylic Acids

Prezhdo, V. V.; Jagello, Marzena; Miel'nik, Igor I.; Prezhdo, Marina

doi:10.1081/ss-120005471

Cited by 20 publications

(10 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results confirm the important role of the solvent polarity on the extraction of ionizable solutes. The dielectric constant is considered a characteristic of extractant - solute local interactions, inducing the limitation of solute solvation by aminic extractant, due to the presence of ionizable groups in the solute chemical structure . The modification of dielectric constant has a smaller effect on the solubility and extraction of nonelectrolytes or weak electrolytes, but it becomes an important factor for the extraction of dissociable solutes, as acetic acid.…”

Section: Resultsmentioning

confidence: 99%

Influence of Organic Phase Polarity on Interfacial Mechanism and Efficiency of Reactive Extraction of Acetic Acid with Tri-n-octylamine

Caşcaval¹,

Kloetzer²,

Galaction³

2011

J. Chem. Eng. Data

View full text Add to dashboard Cite

The reactive extractions of acetic acid, HAc, with tri-n-octylamine (TOA), Q, dissolved in three solvents with different dielectric constants (dichloromethane, butyl acetate, and n-heptane) without and with 1-octanol as phase modifier have been comparatively analyzed. The results indicated that the mechanism of the interfacial reaction between acid and extractant is controlled by the organic phase polarity. In absence of 1-octanol, the structures of the extracted complexes are HAc.Q for dichloromethane, HAc.Q 2 for butyl acetate, and (HAc) 2 Q 4 for n-heptane. These structures are modified by adding 1-octanol and become HAc.Q for extraction in dichloromethane or butyl acetate and (HAc) 2 Q 2 for extraction in n-heptane, respectively. Although the presence of 1-octanol improves the extraction efficiency, it leads to the reduction of extraction constants for lower-polar solvents, influence that is more significant for n-heptane.

show abstract

Section: Resultsmentioning

confidence: 99%

Influence of Organic Phase Polarity on Interfacial Mechanism and Efficiency of Reactive Extraction of Acetic Acid with Tri-n-octylamine

Caşcaval¹,

Kloetzer²,

Galaction³

2011

J. Chem. Eng. Data

View full text Add to dashboard Cite

show abstract

“…Molecular interactions in the first coordination shell are computed explicitly, and the energy of interaction between the solute molecules is neglected. The solute-solvent interaction within the first coordination shell can be expressed as [47]:…”

Section: Resultsmentioning

confidence: 99%

“…Discrete-continuum model [47]. The fact that solute molecules in a dilute solution are surrounded by solvent molecules only, Fig.…”

Section: Resultsmentioning

confidence: 99%

The Role of Intermolecular Interactions in the Electro-Optical Kerr Effect in Liquid Alkanes

et al. 2005

View full text Add to dashboard Cite

The electro-optical Kerr effect of n-alkanes from C 5 to C 16 was investigated in gas phase, liquid phase, and solution. The values of the Kerr constants in gas phase are noticeably distinguishable from those in liquids, where the molecules interact by the London dispersion forces. Both the energy of the dispersion interaction and the difference in the Kerr constants in liquid and gas phase grow with molecular size, indicating the key influence of the interaction on the magnitude of the Kerr effect. Several orientation and molecular-statistical theories of electro-optical Kerr effect were applied to model the change in electro-optical Kerr effect due to the dispersion force. Most theories show significant divergence compared to the experimental data. It is argued that the decisive contribution to electro-optical Kerr effect in liquids and the deviations between the experiment and theory arise due to local liquid structures that collectively orient in the external electric field.

show abstract

“…For the initial model calculations, a hypothetical “Solvent 1” with K i = 1 was defined. This is in the range of other carboxylic acids, for example citric acid ( K i = 0.3), lactic acid ( K i = 0.75), and propanoic acid ( K i = 3.5). , Further parameters for modeling the extraction columns, such as pH control, contact time, temperature, yield, fluxes, specific mass transfer area, and others, are taken from the literature. ,,− …”

Section: Process Modelmentioning

confidence: 99%

Modeling and Analysis of a New Process for Pyruvate Production

Biwer

Zuber

Zelić

et al. 2005

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Early process development is crucial for the economic and environmental performance of a final production process. A new process for the production of pyruvate is presented as a case study to show how process modeling and an analysis of the results regarding economic and environmental aspects improves the understanding of the process, its cost structure, and its environmental impact. It also enables the quantification of process improvements and the comparison of alternative designs. The model of the pyruvate production shows how strain and fermentation improvements propagate through the process and affect its economic and environmental performance. The comparison of two alternative purification concepts, liquid extraction and electrodialysis, show that electrodialysis is a promising approach for the purification of pyruvic acid.

show abstract

Solvent Effects in Extraction of Carboxylic Acids

Cited by 20 publications

References 9 publications

Influence of Organic Phase Polarity on Interfacial Mechanism and Efficiency of Reactive Extraction of Acetic Acid with Tri-n-octylamine

Influence of Organic Phase Polarity on Interfacial Mechanism and Efficiency of Reactive Extraction of Acetic Acid with Tri-n-octylamine

The Role of Intermolecular Interactions in the Electro-Optical Kerr Effect in Liquid Alkanes

Modeling and Analysis of a New Process for Pyruvate Production

Contact Info

Product

Resources

About