Separation of Phenolic Compounds from Coal Tar via Liquid–Liquid Extraction Using Amide Compounds

2015 ◽  
Vol 54 (9) ◽  
pp. 2573-2579 ◽  
Author(s):  
Tiantian Jiao ◽  
Xulei Zhuang ◽  
Hongyan He ◽  
Chunshan Li ◽  
Hongnan Chen ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Coal Tar ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction

Studies on the Extraction of Phenols from Coal Tar Produced in Multi-Generation System

2011 ◽  
Vol 347-353 ◽  
pp. 673-677 ◽  
Author(s):  
Zhen Jing Shi ◽  
Meng Xiang Fang ◽  
Chun Guang Zhou ◽  
Shu Rong Wang ◽  
Zhong Yang Luo
Keyword(s):  
Phenolic Compounds ◽  
Coal Tar ◽  
Liquid Extraction ◽  
Metallurgical Coke ◽  
Generation System ◽  
Phenolic Fraction ◽  
Liquid Liquid Extraction ◽  
Oil Fraction ◽  
Coke Plants ◽  
Cogeneration System

Isolation of phenols from the middle oil fraction(170-230°C) of tar produced in the multi-cogeneration system has been investigated for the purpose of recovering valuable pure phenols, such as phenol, cresols, xylenol and ethyl-phenol. Phenolic compounds were separated from the middle oil by liquid-liquid extraction using alkali and sulfuric acid. The yield of phenolic fraction from the middle oil (170-230°C) is up to 37%, which is much higher compared with those of metallurgical coke plants. Chromatography-mass spectrometry was used to analyse phenolic compounds. The result shows that the phenol content is less than 2%, and main compounds are cresol(14%), xylenol(20%) . Phenols of the middle oil fraction(230-280°C) was also analysed, which main contain methyl naphthol(20%).

The new liquid–liquid extraction method for separation of phenolic compounds from coal tar

2015 ◽  
Vol 266 ◽  
pp. 148-155 ◽  
Author(s):  
Tiantian Jiao ◽  
Chunshan Li ◽  
Xulei Zhuang ◽  
Shasha Cao ◽  
Hongnan Chen ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Extraction Method ◽  
Coal Tar ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction

Development of a rotatory and continuous liquid–liquid extraction technique for phenolic compounds in wine

The Analyst ◽  
1996 ◽  
Vol 121 (3) ◽  
pp. 297-302 ◽  
Author(s):  
E. R. Brú ◽  
C. G. Barroso ◽  
R. Cela ◽  
J. A. Pérez-Bustamante
Keyword(s):  
Phenolic Compounds ◽  
Liquid Extraction ◽  
Extraction Technique ◽  
Liquid Liquid Extraction

scholarly journals Recovery and Elimination of Phenolic Pollutants from Water Using [NTf2] and [Nf2]-Based Ionic Liquids

2019 ◽  
Vol 9 (20) ◽  
pp. 4321
Author(s):  
Sas ◽  
Domínguez ◽  
González
Keyword(s):  
Ionic Liquids ◽  
Phenolic Compounds ◽  
Extraction Yield ◽  
Liquid Extraction ◽  
Industrial Growth ◽  
Extraction Solvent ◽  
Phenolic Pollutants ◽  
Liquid Liquid Extraction ◽  
Volatile Organic ◽  
Extraction Solvents

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.

Liquid-liquid extraction of phenolic compounds in systems based on acetonitrile + water + polyvinylpyrrolidone at 298.15 K

2019 ◽  
Vol 211 ◽  
pp. 117-123 ◽  
Author(s):  
Bruno Sales Oliveira ◽  
Camila Maria de Souza D'Anzicourt ◽  
Cleide Mara Faria Soares ◽  
Ranyere Lucena de Souza ◽  
Álvaro Silva Lima
Keyword(s):  
Phenolic Compounds ◽  
Liquid Extraction ◽  
Liquid Liquid Extraction

scholarly journals Solvent extraction and spectroscopy identification of bioactive compounds from medicinal shrub Tamarix gallica

2020 ◽  
Vol 10 (11) ◽  
pp. 456
Author(s):  
Moussa Mohammed Elamin
Keyword(s):  
Solvent Extraction ◽  
Phenolic Compounds ◽  
Secondary Metabolites ◽  
Bioactive Compounds ◽  
Liquid Extraction ◽  
Spectroscopy Analysis ◽  
Phytochemical Study ◽  
Liquid Liquid Extraction ◽  
Tamarix Gallica

This research is interested in chemical valorization of the medicinal shrub called Tamarix gallica. The phytochemical study of the extracts of this plant showed that it is rich in phenolic compounds especially the flavonoids. The liquid-liquid extraction by n-butanol and acetate of ethyl of the leaves allowed to us the extraction of the secondary metabolites of class of the flavonoids.The identification of the isolated flavonoids is made by the spectroscopy methods: UV, IR, NMRH, from where we extracted some structures of flavonols class. Keywords: Tamarix gallica, chemical valorization, flavonoids, extraction, spectroscopy analysis, chromatography methods.

scholarly journals Comparison of the Partition Efficiencies of Multiple Phenolic Compounds Contained in Propolis in Different Modes of Acetonitrile–Water-Based Homogenous Liquid–Liquid Extraction

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 442 ◽  
Author(s):  
Wenbin Chen ◽  
Xijuan Tu ◽  
Dehui Wu ◽  
Zhaosheng Gao ◽  
Siyuan Wu ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Caffeic Acid ◽  
Extraction Methods ◽  
Reversed Phase ◽  
Liquid Extraction ◽  
Subzero Temperature ◽  
Experimental Conditions ◽  
Salting Out ◽  
Liquid Liquid Extraction ◽  
Water Based

Homogeneous liquid–liquid extraction (HLLE) has attracted considerable interest in the sample preparation of multi-analyte analysis. In this study, HLLEs of multiple phenolic compounds in propolis, a polyphenol-enriched resinous substance collected by honeybees, were performed for improving the understanding of the differences in partition efficiencies in four acetonitrile–water-based HLLE methods, including salting-out assisted liquid–liquid extraction (SALLE), sugaring-out assisted liquid–liquid extraction (SULLE), hydrophobic-solvent assisted liquid–liquid extraction (HSLLE), and subzero-temperature assisted liquid–liquid extraction (STLLE). Phenolic compounds were separated in reversed-phase HPLC, and the partition efficiencies in different experimental conditions were evaluated. Results showed that less-polar phenolic compounds (kaempferol and caffeic acid phenethyl ester) were highly efficiently partitioned into the upper acetonitrile (ACN) phase in all four HLLE methods. For more-polar phenolic compounds (caffeic acid, p-coumaric acid, isoferulic acid, dimethoxycinnamic acid, and cinnamic acid), increasing the concentration of ACN in the ACN–H2O mixture could dramatically improve the partition efficiency. Moreover, results indicated that NaCl-based SALLE, HSLLE, and STLLE with ACN concentrations of 50:50 (ACN:H2O, v/v) could be used for the selective extraction of low-polarity phenolic compounds. MgSO4-based SALLE in the 50:50 ACN–H2O mixture (ACN:H2O, v/v) and the NaCl-based SALLE, SULLE, and STLLE with ACN concentrations of 70:30 (ACN:H2O, v/v) could be used as general extraction methods for multiple phenolic compounds.

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