Extraction Equilibria of Glycolic Acid Using Tertiary Amines: Experimental Data and Theoretical Predictions

Datta, Dipaloy; Aşçı, Yavuz Selim; Tuyun, Amaç Fatih

doi:10.1021/acs.jced.5b00497

Cited by 19 publications

(9 citation statements)

References 39 publications

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“…The 1-octanol from the solvents used in the study allowed the separation of the acid with high dispersion coefficients. This can be explained by the hydrogen-bonding capabilities of alcohols. − …”

Section: Resultsmentioning

confidence: 99%

Parametric Analysis of Mandelic Acid Separation from Aqueous Solutions by Using Secondary Amine Mixture (Amberlite LA-2) in Various Diluents

Kiriş

Aşçı

2019

J. Chem. Eng. Data

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Mandelic acid (MA) an α hydroxycarboxylic acid found in bitter almonds. It has gained importance in recent years, especially due to its use in the cosmetic industry. Separation processes of mandelic acid have a critical point in the production stages obtained the product form. In this study, extraction of mandelic acid from aqueous solutions was carried out using five different concentrations of Amberlite LA-2 (LA2) solution. Dimethyl phthalate (DMP), methyl isobutyl ketone (MIBK), 2-octanone, 1-octanol, n-pentane, octyl acetate, and toluene were used as diluents in the organic phase. The batch extraction results of mandelic acid were obtained for process design. The data were analyzed with respect to loading factor (Z), distribution coefficient (D), and extraction efficiency (E). In addition, the overall extraction constants, K 11, K 12, K 13, and K 23 have been determined for acid–amine complex. The maximum removal of mandelic acid in this study is 92.75% with MIBK and 0.57 mol·kg–1 initial concentration of Amberlite LA-2.

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Section: Resultsmentioning

confidence: 99%

Parametric Analysis of Mandelic Acid Separation from Aqueous Solutions by Using Secondary Amine Mixture (Amberlite LA-2) in Various Diluents

Kiriş

Aşçı

2019

J. Chem. Eng. Data

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“…Therefore, the continuation of the process will be feasible by removing the acid in the medium or adding an agent to neutralize the fermentation media. Another problem is that the acid formed from fermentation is found in a dilute aqueous solution of about 10% (w/w) (3,4).…”

Section: Introductionmentioning

confidence: 99%

Mg-Al Layered Double Hydroxide (LDH) as an Adsorbent for Removal of Itaconic Acid from Aqueous Solutions: Equilibrium and Kinetic Study

Lalikoğlu

2021

Journal of the Turkish Chemical Society Section A: Chemistry

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This study aims to remove itaconic acid, one of the important members of carboxylic acids, from its aqueous solutions by using an adsorption method. Recently the Layered Double Hydroxide (LDH), which has attracted attention in many areas, was synthesized by the co-precipitation method and used as an adsorbent. The effects of the adsorption time, LDH amounts, adsorption temperature, and initial acid concentration changes on the adsorption efficiency were examined. In one-stage batch adsorption experiments performed under different conditions, approximately 70% of itaconic acid was removed from the aqueous phase using 1 g of LDH. Various adsorption isotherm models such as Langmuir, Freundlich, and Temkin were applied to the obtained experimental data. Since R 2 values are greater than 0.98, it can be said that the experimental data fit all three isotherm models. Kinetic studies were carried out using timedependent measurements. Adsorption behavior was kinetically investigated using pseudo-first-order, pseudo-second-order, and Elovich models. The kinetics of the adsorption of itaconic acid by LDH was found to be the best defined by the pseudo-second-order model.

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“…and amine [tridodecylamine (TDDA), Aliquat 336, Amberlite LA-2, tri- n -octylamine (TOA), etc.] extractants. − ,− Asci and Inci performed extraction studies of itaconic acid using a mixture of TOA + TDDA and several diluents. 98.39% of extraction efficiency was obtained with the TOA + TDDA + dimethyl phthalate mixture.…”

Section: Introductionmentioning

confidence: 99%

“…Here, they used TOA or TBP in hexane as the extract phase. In the equilibrium study of glycolic acid, a solvent system comprised of 50 vol % TOA + 50 vol % TDDA was used by Datta et al with several diluents (dimethyl phthalate, methyl isobutyl ketone, 2-octanone, 1-decanol, and cyclohexyl acetate). Among various extractants, the aliphatic tertiary amines could provide a better separation of carboxylic acid molecules, causing a significant increase in the distribution coefficient by the formation of acid–amine complexes transferring protons.…”

Section: Introductionmentioning

confidence: 99%

Study on the Biocompatible Solvent Systems for the Reactive Extraction of Itaconic Acid

et al. 2019

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The separation of itaconic acid (0.2 mmol·kg–1) from its aqueous solution is performed by dissolving tri-n-octylamine (TOA) in the biocompatible mixtures of 1-decanol + n-dodecane, dodecanol + n-dodecane, and oleyl alcohol + n-dodecane at different compositions. Also, the physical extraction data are presented with dodecane, oleyl alcohol, dodecanol, and 1-decanol. Here, fixing the TOA composition at 20 vol %, the vol % of modifiers (oleyl alcohol, dodecanol, and 1-decanol) is changed from 20 to 60 vol % in dodecane (diluent) to find the best combination for the extraction of the acid. The extraction system comprised of 20 vol % TOA + 40 vol % dodecanol + 20 vol % n-dodecane gives the best separation efficiency (95.06%). Then, with this solvent system, equilibrium studies are carried out at different acid concentrations (0.05 and 0.251 mmol·kg–1). Based on the theoretical study, the insights of the extraction mechanism are determined in terms of equilibrium constants (overall and individual, K E, K 11, and K 21) and stoichiometry (m and n) at 298 K.

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Extraction Equilibria of Glycolic Acid Using Tertiary Amines: Experimental Data and Theoretical Predictions

Cited by 19 publications

References 39 publications

Parametric Analysis of Mandelic Acid Separation from Aqueous Solutions by Using Secondary Amine Mixture (Amberlite LA-2) in Various Diluents

Parametric Analysis of Mandelic Acid Separation from Aqueous Solutions by Using Secondary Amine Mixture (Amberlite LA-2) in Various Diluents

Mg-Al Layered Double Hydroxide (LDH) as an Adsorbent for Removal of Itaconic Acid from Aqueous Solutions: Equilibrium and Kinetic Study

Study on the Biocompatible Solvent Systems for the Reactive Extraction of Itaconic Acid

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