Distillation Sequence Efficiency (DSE) for Suitable Liquid-Liquid Extraction Solvents: Acetic Acid Extraction with TOA

At present, pollution is one of the most important problems worldwide. Industrial growth makes it necessary to develop techniques to remove pollutant substances from water, since water is an important natural source for life. One of these techniques is liquid–liquid extraction, which is used to remove phenolic compounds from wastewaters. Volatile organic compounds are used as common extraction solvents in liquid–liquid extractions; nevertheless, some of their properties, such as toxicity and volatility, make it necessary to replace them with other less toxic solvents. In this work, the capability of four ionic liquids, based on bis(trifluoromethylsulfonyl)imide [NTf2] and bis(fluorosulfonyl)imide [Nf2] anions and different cations to remove phenolic compounds from water was studied. The phenolic compounds used in this study were phenol, o-cresol, and 2-chlorophenol, and the effects of the extraction solvent and phenol structures were analyzed. For that, a liquid–liquid extraction was carried out, and the extraction yield was determined. In general, high extraction efficiencies were obtained for all studied systems, obtaining the highest extraction efficiencies using the pyrrolidinium cation-based ionic liquids.

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Acetic acid extraction from rumen fluid by forward osmosis

Environmental Technology & Innovation ◽

10.1016/j.eti.2020.101083 ◽

2020 ◽

Vol 20 ◽

pp. 101083

Author(s):

Jamshed Ali Khan ◽

Luong N. Nguyen ◽

Hung C. Duong ◽

Long D. Nghiem

Keyword(s):

Acetic Acid ◽

Rumen Fluid ◽

Forward Osmosis ◽

Acid Extraction ◽

Acetic Acid Extraction

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Selection of a recyclable in situ liquid–liquid extraction solvent for foam-free synthesis of rhamnolipids in a two-phase fermentation

Green Chemistry ◽

10.1039/d0gc02885a ◽

2020 ◽

Vol 22 (23) ◽

pp. 8495-8510 ◽

Cited By ~ 2

Author(s):

Philipp Demling ◽

Maximilian von Campenhausen ◽

Carolin Grütering ◽

Till Tiso ◽

Andreas Jupke ◽

...

Keyword(s):

Liquid Extraction ◽

Stirred Tank ◽

Biotechnological Production ◽

Two Phase ◽

Stirred Tank Reactors ◽

Extraction Solvent ◽

Liquid Liquid Extraction ◽

Extraction Solvents ◽

Selection Of

A multi-step reductive approach for the selection of in situ extraction solvents for bioprocesses was developed enabling a foam-free biotechnological production of rhamnolipids in stirred-tank reactors.

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Spectrophotometric Determination of Trace Zn(II) with Phenanthraquinone Monophenyl Thiosemicarbazone Following Homogeneous Liquid-Liquid Extraction in the Water-Acetic Acid-Chloroform Ternary Solvent System

International Journal of Scientific Research in Knowledge ◽

10.12983/ijsrk-2013-p140-147 ◽

2013 ◽

Vol 1 (6) ◽

pp. 140-147 ◽

Cited By ~ 1

Author(s):

Ali Mazloomifar ◽

Maliheh Ahadi

Keyword(s):

Acetic Acid ◽

Spectrophotometric Determination ◽

Solvent System ◽

Liquid Extraction ◽

Homogeneous Liquid ◽

Liquid Liquid Extraction

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THE ISOBUTYL GROUP IN SPRUCE AND BIRCH LIGNINS

Canadian Journal of Research ◽

10.1139/cjr49b-057 ◽

1949 ◽

Vol 27b (6) ◽

pp. 572-579 ◽

Cited By ~ 2

Author(s):

Alan Bell ◽

George F Wright

Keyword(s):

Acetic Acid ◽

Formic Acid ◽

Hydroxyl Group ◽

Acid Extraction ◽

Acid Extract ◽

Permanganate Oxidation ◽

Perbenzoic Acid ◽

Acetic Acid Extraction ◽

Acid Titration

Acetone has been isolated by permanganate oxidation of birch and spruce lignins extracted from wood by acetic or formic acid. Acetone was obtained also when the formic acid lignins were ozonized but not from the acetic acid – extracted lignins. This difference was confirmed when perbenzoic acid titration indicated unsaturation in the formic acid extract which was not present in the acetic acid extract. It is suggested that an α-hydroxy-β-methoxyisobutyl group is present in lignin; during acetic acid extraction the hydroxyl group is acetylated but during formic acid extraction the formic acid reduces the group to isobutenyl, which will give acetone when it is ozonized.

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Studies on Enantioselective Liquid-Liquid Extraction of Amino-(4-nitro-phenyl)-acetic Acid Enantiomers: Modeling and Optimization

Chirality ◽

10.1002/chir.22266 ◽

2013 ◽

Vol 26 (2) ◽

pp. 79-87 ◽

Cited By ~ 8

Author(s):

Panliang Zhang ◽

Chang Liu ◽

Kewen Tang ◽

Jiajia Liu ◽

Congshan Zhou ◽

...

Keyword(s):

Acetic Acid ◽

Liquid Extraction ◽

Phenyl Acetic Acid ◽

Modeling And Optimization ◽

Liquid Liquid Extraction

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Production of Bio-Based Chemicals, Acetic Acid and Furfural, through Low-Acid Hydrothermal Fractionation of Pine Wood (Pinus densiflora) and Combustion Characteristics of the Residual Solid Fuel

Applied Sciences ◽

10.3390/app11167435 ◽

2021 ◽

Vol 11 (16) ◽

pp. 7435

Author(s):

Hyun Jin Jung ◽

Kyeong Keun Oh

Keyword(s):

Heat Treatment ◽

Acetic Acid ◽

Sulfuric Acid ◽

Solvent Extraction ◽

Pinus Densiflora ◽

Liquid Extraction ◽

Pine Wood ◽

Platform Chemicals ◽

Liquid Liquid Extraction ◽

Fuel Characteristics

Low-acid hydrothermal (LAH) fractionation conditions were optimized for the effective degradation of hemicellulose from pine wood (Pinus densiflora). The hemicellulosic sugar yield was maximized at 82.5% when the pine wood was fractionated at 190 °C, with 0.5 wt.% of sulfuric acid, and for 10 min. Consecutively, acidified heat treatment with zinc chloride and solvent extraction with ethyl acetate were carried out for the recovery of bio-based platform chemicals, such as furfural and acetic acid, from liquid hydrolysate through liquid–liquid extraction (LLE). Overall, 61.5% of xylose was decomposed into furfural, and the yield of acetic acid was 62.3% and furfural 66.1%. After LAH fractionation, 64.8% of the solid remained and was pelletized. The pellets showed excellent fuel characteristics, i.e., significant ash rejection (74.5%) and high calorific values (4770 kcal/kg), and the precursors of NOx and SOx also decreased by up to 60.0% and 71.4%, respectively.

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Mangiferin Rich Products from Aphloia theiformis (Vahl) Benn Leaves: Extraction, Fractionation, Phytochemical Characterization, and Antioxidant Properties

Molecules ◽

10.3390/molecules25092081 ◽

2020 ◽

Vol 25 (9) ◽

pp. 2081

Author(s):

Dovilė Grauzdytė ◽

Audrius Pukalskas ◽

Chaker El Kalamouni ◽

Petras Rimantas Venskutonis

Keyword(s):

Antioxidant Capacity ◽

Antioxidant Properties ◽

Natural Antioxidants ◽

Liquid Extraction ◽

In Vitro Assays ◽

Synthetic Antioxidant ◽

Liquid Liquid Extraction ◽

Extraction Solvents ◽

First Time

Aphloia theiformis is traditionally used in Mauritius, Madagascar, and Reunion Island for treating several diseases. In this study, various extraction solvents and schemes were applied for the recovery of antioxidant rich fractions from the leaves of A. theiformis. The products were evaluated for their antioxidant capacity using well known in vitro assays. Major compounds were characterized by UPLC–QTOF–MS. Hydrophilic extracts of A. theiformis demonstrated strong antioxidant properties, which are comparable with the synthetic antioxidant Trolox. UPLC analysis confirmed mangiferin as the main secondary metabolite of A. theiformis. Tormentic and hydroxytormentic acids as well as their isomers were also abundant in A. theiformis extracts and fractions, while their amounts were determined for the first time. The most potential extract was further separated into the fractions by liquid-liquid extraction and by precipitation at low temperature. Antioxidant capacity and composition of secondary metabolites of derived fractions were determined. Some of the fractions possessed remarkable antioxidant capacity, comparable to pure mangiferin. The results obtained reveal high potential of A. theiformis for recovery of natural antioxidants and other bioactive phytochemicals, particularly mangiferin.

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