Mass transfer dynamics in the separation of phenol from model oil with quaternary ammonium salts via forming deep eutectic solvents

Hou, Yucui; Kong, Jie; Ren, Yuehong; Ren, Shuhang; Wu, Weize

doi:10.1016/j.seppur.2016.10.038

Cited by 27 publications

(10 citation statements)

References 22 publications

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“…Conventional organic solvent-based techniques for the extraction of flavonoids tend to require long extraction times and high extraction temperatures, with the large-scale use of organic solvents being detrimental to the environment. To address these issues, deep eutectic solvents (DESs) have been applied in several areas of chemistry [ 13 , 14 , 15 , 16 , 17 , 18 ], including various extraction and purification processes. Deep eutectic solvents are environmentally-friendly solvents that exhibit a variety of beneficial properties.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, DESs are very suitable to microwave or ultrasound-assisted extraction, because this polar solvents have a higher dielectric constant than organic solvents and can absorb more energy, which would result in better extraction yields and saving energy [ 22 ]. Using DESs to extract phenolic compounds from oil can avoid the production of waste water containing phenolic compounds and the use of inorganic acids and alkalis [ 14 ]. Deep eutectic solvents consist of simple and naturally occurring compounds with a high safety profile, and they are considered as new environmentally-friendly solvents.…”

Section: Introductionmentioning

confidence: 99%

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Environmentally-Friendly Extraction of Flavonoids from Cyclocarya paliurus (Batal.) Iljinskaja Leaves with Deep Eutectic Solvents and Evaluation of Their Antioxidant Activities

Shang

Tan

et al. 2018

Molecules

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Deep eutectic solvents (DESs) are commonly employed as environmentally-friendly solvents in numerous chemical applications owing to their unique physicochemical properties. In this study, a novel and environmentally-friendly extraction method based on ultrasound assisted-deep eutectic solvent extraction (UAE-DES) was investigated for the extraction of flavonoids from Cyclocarya paliurus (Batal.) Iljinskaja (C. paliurus) leaves, and the antioxidant activities of these flavonoids were evaluated. Nine different DES systems based on either two or three components were tested, and the choline chloride/1,4–butanediol system (1:5 molar ratio) was selected as the optimal system for maximizing the flavonoid extraction yields. Other extraction conditions required to achieve the maximum flavonoid extraction yields from the leaves of C. paliurus were as follows: DES water content (v/v), 30%; extraction time, 30 min; temperature, 60 °C; and solid-liquid ratio, 20 mg/mL. Liquid chromatography-mass spectrometry allowed the detection of five flavonoids in the extract, namely kaempferol-7-O-α-l-rhamnoside, kaempferol, quercetin, quercetin-3-O-β-d-glucuronide, and kaempferol-3-O-β-d-glucuronide. In vitro antioxidant tests revealed that the flavonoid-containing extract exhibited strong DPPH and ABTS radical-scavenging abilities. Results indicate that UAE-DES is a suitable approach for the selective extraction of flavonoids from C. paliurus leaves, and DESs can be employed as sustainable extraction media for other bioactive compounds.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Environmentally-Friendly Extraction of Flavonoids from Cyclocarya paliurus (Batal.) Iljinskaja Leaves with Deep Eutectic Solvents and Evaluation of Their Antioxidant Activities

Shang

Tan

et al. 2018

Molecules

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“…Primary techniques such as Lewis cells and single drops [17][18][19] are available to the investigation of extraction kinetics. Because of the stability and simplicity of constant-interfacial-area cell, it is considered the most effective method for kinetic studies and already used by many researchers in their investigations [20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Kinetics and Mechanism on Removal of Aluminum from Phosphoric Medium by Solvent Extraction using Lewis Cells

Yan¹,

Zhuang²,

Wang³

et al. 2021

SERDJ

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The kinetics of the forward extraction of aluminum ion had been investigated using Lewis cells. The influences of the aluminum concentration, temperature, and interfacial area were studied. The extracted species was demonstrated to be AlL 3 •(HL) 3 by stoichiometry studies and the mechanism of the extraction was explained. The results indicated that the extraction process was under mixed-control by the extraction reaction at the interface and the diffusion of the resultant in the organic phase. The activation energy was calculated to be 23.26 kJ/mol and was concordant with the mixed-control regime. Further analysis suggested that the reaction orders with respect to aluminum and extractant were 1 and 2, respectively, and the extraction rate constant was 10 −4.526 L 2 •g −2 •s −1 . The total rate of the extraction reaction for AlL 3 •(HL) 3 was given based on kinetic steps.

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“…Based on this idea, the present work studies the influence of phenol on the cloud point of poliethoxylates surfactants. Phenol is employed largely in the industry for the production of plastics, pesticides, resins, and medicines (Hou et al, 2017;Wang et al, 2017;Li et al 2017;Delgado-Marín, 2017). Therefore, it is important to study the effects of phenol on the cloud point of non-ionic surfactants.…”

Section: Introductionmentioning

confidence: 99%

Phenol Estimation Using Flory-Huggins Parameters and Cloud Point of Poliethoxylate Surfactants

Araújo

Silva

Foletto

et al. 2019

BJPG

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This work examines the thermodynamics of phenol extraction by cloud point varying the ethoxylation degrees of nonylphenolpoliethoxylate surfactants (NPEOn) (9.5, 10, 11 and 12). The Flory-Huggins model was applied to estimate enthalpy (ΔH mix) and entropy (ΔS mix) parameters of the mixture, as well as the aggregate number (N). Results show that ΔH mix and ΔS mix values have a direct relationship with the ethoxylation degree of the surfactant used. Differently, aggregate number (N) values have an inverse relationship with the ethoxylation degree. The fitting to the Flory-Huggins model presented a standard deviation (SD) that ranged from 0.161 to 4.037 for each surfactant studied. It was observed that the increase of the phenol concentration in the surfactant + water system resulted in a decrease in the cloud point of the studied surfactants. These results contribute significantly to the application of this type of surfactant in phenol extraction processes.

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Mass transfer dynamics in the separation of phenol from model oil with quaternary ammonium salts via forming deep eutectic solvents

Cited by 27 publications

References 22 publications

Environmentally-Friendly Extraction of Flavonoids from Cyclocarya paliurus (Batal.) Iljinskaja Leaves with Deep Eutectic Solvents and Evaluation of Their Antioxidant Activities

Environmentally-Friendly Extraction of Flavonoids from Cyclocarya paliurus (Batal.) Iljinskaja Leaves with Deep Eutectic Solvents and Evaluation of Their Antioxidant Activities

Kinetics and Mechanism on Removal of Aluminum from Phosphoric Medium by Solvent Extraction using Lewis Cells

Phenol Estimation Using Flory-Huggins Parameters and Cloud Point of Poliethoxylate Surfactants

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