Salt effect on the liquid-liquid equilibrium of water-furfuryl alcohol-furfural system at 298.15 K

Kunthakudee, Naphaphan; Pancharoen, Ura; Fulajtárová, Katarína; Soták, Tomáš; Hronec, Milan; Ramakul, Prakorn

doi:10.1007/s11814-017-0136-8

Cited by 6 publications

(6 citation statements)

References 17 publications

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“…The conversion of PBA 2 X to furfural at high ionic strengths can be combined with the boronate-mediated extraction of xylose from diluted biomass hydrolysate . Such a two-step approach allows us to convert dilute aqueous xylose to furfural with (i) high selectivity, (ii) easy recovery and purification, and (iii) easy recycling of the aqueous solution containing salt. , …”

Section: Results and Discussionmentioning

confidence: 99%

“…It has also been reported that divalent cations interact more strongly with saccharides than with monovalent ones. , Combs et al have reported that alkaline earth metal cations interact with glucose, forming bidentate complexes, which accelerate its transformation . In the specific context of biphasic operations, the presence of salt in the aqueous phase also alters the partitioning of the newly formed furfural, with a positive effect on its reactive extraction and hence its selectivity. , …”

Section: Introductionmentioning

confidence: 99%

“…23 In the specific context of biphasic operations, the presence of salt in the aqueous phase also alters the partitioning of the newly formed furfural, with a positive effect on its reactive extraction and hence its selectivity. 24,25 Industrial application of solvent systems with added salt is impaired by the cost of recovering and recycling the salt or the cost of consuming the salt and of disposing of the saline wastewater. 3,26 In this work, we show one way to possibly solve this problem, that is, selectively extract xylose as boronate diester from the sugar hydrolysate.…”

Section: ■ Introductionmentioning

confidence: 99%

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Synergic Effects of Boronate Diester Formation and High-Ionic Strength Biphasic Operation on Xylose-to-Furfural Selectivity

Ricciardi

Verboom

Lange

et al. 2022

ACS Sustainable Chem. Eng.

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Developing strategies to boost the selectivity for furfural from biomass-based xylose is important for the development of green fuels and chemicals. This study explores the effects of ionic strength on the dehydration of xylose, starting from its phenylboronate diester (PBA 2 X), under biphasic conditions. Experimental results obtained from reactions at 200 °C in a 1:1 v/v organic−aqueous biphasic system (composed of either 1methylnaphthalene or toluene and water at pH = 1 from H 2 SO 4 ) indicate that increasing the ionic strength (by adding Na 2 SO 4 ) from 0.1 to 6.1 M results in an increased xylose-to-furfural selectivity (from ∼70 to ∼90 mol %). This is partly due to the effect of salt on the partitioning of furfural, which is pushed into the organic phase, while the rate of furfural formation is enhanced, as reported in the literature. Remarkably, however, starting from PBA 2 X increases the xylose-to-furfural selectivity (88 mol %) beyond the level observed when starting from free xylose (75 mol %). Combined, these results indicate a synergic effect of the use of the PBA diester of xylose as the starting material, biphasic operation, and high ionic strength on the overall xylose-to-furfural selectivity. Based on these results, a process concept is proposed, which connects an extraction step, to retrieve xylose as the boronate diester from a xylose-rich biomass hydrolysate, to the selective furfural production at high-ionic strength under biphasic conditions. Such a process avoids addition of salt to the original biomass feed and thus combines the benefits and selectivity enhancements of ester formation, biphasic operation, and high ionic strength while allowing the recovery of the product and the closing of the process cycles. The validity of the process concept is supported by additional data on partitioning, losses, and product isolation, as well as an analysis of sustainability metrics.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synergic Effects of Boronate Diester Formation and High-Ionic Strength Biphasic Operation on Xylose-to-Furfural Selectivity

Ricciardi

Verboom

Lange

et al. 2022

ACS Sustainable Chem. Eng.

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“…Thus, water is intended as a solvent for separating the EG–EGDA mixture system in this paper. The addition of salt into the mixture system will cause great changes in the composition and affect the liquid–liquid equilibrium. − Salt mainly affects the solubility of organic components in aqueous–organic solvent mixtures . On the basis of the theory of “similarity and intermiscibility”, in the presence of salt, the association of salt ions with water molecules changes the similarity of the molecule structure between water and organic solvent, which will lead to changes of solubility between water and organic solvent.…”

Section: Introductionmentioning

confidence: 99%

Salt Effect on the Liquid–Liquid Equilibrium for the Water–Ethylene Glycol–Ethylene Glycol Diacetate System

Shen

et al. 2019

J. Chem. Eng. Data

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The salt effect on the liquid–liquid equilibrium (LLE) for the water–ethylene glycol (EG)–ethylene glycol diacetate (EGDA) system was studied at 303.2 K and 101.3 kPa. The influence of different NaCl concentrations (0, 5, 15, and 20 wt %) and salt types (NaCl, CaCl2, and KCl) on the equilibrium systems was researched. The distribution coefficients and separation factors were calculated to evaluate the effect of the EG extraction. The results show that the addition of salt increases the two-phase region of the equilibrium system and the order of the effect of salt types is as follows: CaCl2 > NaCl > KCl. The reliability of the experimental data was validated by the Eisen–Joffe equation. The NRTL model was applied to correlate the experimental data; the low values of MAD and RMSD confirmed the good correlation of the experimental results.

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“…Reliable liquid–liquid equilibrium (LLE) data can support the separation design of water and FAL. The literature , has reported the liquid–liquid equilibrium (LLE) data of the ternary system for isopropyl ether, tertbutyl methyl ether, dichloromethane, methyl isobutyl methanol, ethyl acetate (EAC), methyl isobutyl ketone, furfural (FUR), and 1-butanol + water + FAL at 298.2 K. There is also some literature − that has studied the influence of salt on the LLE of cyclopentanone, FUR, and 1-butanol + water + FAL ternary systems.…”

Section: Introductionmentioning

confidence: 99%

Measurement and Correlation of Liquid–Liquid Equilibrium Data for Ternary Systems of Water + Furfuryl Alcohol + (1-Pentanol and n-Propyl Acetate) at Different Temperatures

Han

Yan

et al. 2021

J. Chem. Eng. Data

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Liquid–liquid equilibrium (LLE) data for the ternary mixture of water + furfuryl alcohol (FAL) + {1-pentanol and n-propyl acetate} was measured in 101.3 kPa at 303.2, 313.2, and 323.2 K. The separation factor (S) and distribution coefficient (D) appraised the utility of extracting FAL from water. The experimental data were accurately correlated by the nonrandom two-liquid (NRTL) and the universal quasi-chemical (UNIQUAC) models with the root-mean-square deviation (RMSD%) values. The values are less than 0.37%. The relevant binary interaction parameters were calculated. The GUI-MATLAB was used to check the consistency of the calculated binary interaction parameters and liquid–liquid equilibrium data. The σ-profiles can analyze the molecular interaction, which further confirms the accuracy of the experimental results. The excellent performance of 1-pentanol and n-propyl acetate in the extraction of FAL from an aqueous solution was shown.

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Salt effect on the liquid-liquid equilibrium of water-furfuryl alcohol-furfural system at 298.15 K

Cited by 6 publications

References 17 publications

Synergic Effects of Boronate Diester Formation and High-Ionic Strength Biphasic Operation on Xylose-to-Furfural Selectivity

Synergic Effects of Boronate Diester Formation and High-Ionic Strength Biphasic Operation on Xylose-to-Furfural Selectivity

Salt Effect on the Liquid–Liquid Equilibrium for the Water–Ethylene Glycol–Ethylene Glycol Diacetate System

Measurement and Correlation of Liquid–Liquid Equilibrium Data for Ternary Systems of Water + Furfuryl Alcohol + (1-Pentanol and n-Propyl Acetate) at Different Temperatures

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