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

Jiao, Tiantian; Li, Chunshan; Zhuang, Xulei; Cao, Shasha; Chen, Hongnan; Zhang, Suojiang

doi:10.1016/j.cej.2014.12.071

Cited by 144 publications

(53 citation statements)

References 27 publications

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“…They usually maintain in liquid form at room temperature 5 . They exhibit wide liquid range, high heat capacity, high thermal and chemical stability, and low vapor pressure 6 .They are extensively applied as green solvents to a variety of fields, such as organic synthesis, chromatography analysis, electrochemistry, and separation 7,8 . ILs gradually became an alternative to conventional organic solvent.…”

Section: Introductionmentioning

confidence: 99%

An ionic liquid extraction process for the separation of indole from wash oil

Jiao

Zhuang

et al. 2015

Green Chem.

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Indole is an important industrial substance derived from wash oil, and the traditional alkali fusion method causes serious environmental problems. In this research, imidazolium-based ionic liquids (IBILs) were developed as new extraction agents to separate indole from wash oil with extraction efficiencies more than 90%.The influence of the structure of IBILs was explored. The extraction efficiency and the distribution coefficient of indole were used as the indexes to evaluate the IBILs extraction ability. The key experimental parameters such as initial indole concentration, extraction time, extraction temperature, and volume ratio of IBILs-to-model wash oil were investigated to obtain the optimum condition. The separation mechanism was studied by analyzing the chemical bonds using spectrographic analysis and molecular simulation. IBILs were recycled by back-extraction and exhibited good recycling properties with no obvious reduction and high extraction efficiency. Finally, the optimal process was conducted based on the process simulation.

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Section: Introductionmentioning

confidence: 99%

An ionic liquid extraction process for the separation of indole from wash oil

Jiao

Zhuang

et al. 2015

Green Chem.

Self Cite

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“…Then the sample was cooled down to room temperature and the mixture was washed by water thoroughly to remove the IL, and then dried in vacuum at 70°C overnight. The IL can be reused after removal of water under vacuum [24]. Scheme 1.…”

Section: Pretreatment Of Coal Samplesmentioning

confidence: 99%

Pretreatment of coal by ionic liquids towards coal electrolysis liquefaction

Liu

Zhou

Tang

et al. 2015

Fuel

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“…Due to the high complexity in molecular compositions of crude coal tar, the chromatographic peaks of various compounds with similar structures or physicochemical properties overlap in GC/MS analysis. Therefore, separation methods, such as distillation, liquid‐liquid extraction, and column chromatography, have been applied to facilitate the compositional characterization of coal tar by GC/MS and fine separation of valuable chemicals such as condensed arenes and phenols (Morgan et al, ; Long et al, ; Pan et al, ; Yao et al, ; Li et al, ; Jiao et al, ,b; Sun et al, ). Two coal tar distillate fractions, i.e., creosote oil (100–300 °C boiling range) and anthracene oil (250–370 °C boiling range), were analyzed with GC/MS (Morgan et al, ).…”

Section: Small‐molecular Chemicals In Cdls Identified By Gc/msmentioning

confidence: 99%

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

Liu

Fan

Wei

et al. 2016

Mass Spectrometry Reviews

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Coal-derived liquids (CDLs) are primarily generated from pyrolysis, carbonization, gasification, direct liquefaction, low-temperature extraction, thermal dissolution, and mild oxidation. CDLs are important feedstocks for producing value-added chemicals and clean liquid fuels as well as high performance carbon materials. Accordingly, the compositional characterization of chemicals in CDLs at the molecular level with advanced analytical techniques is significant for the efficient utilization of CDLs. Although reviews on advancements have been rarely reported, great progress has been achieved in this area by using gas chromatography/mass spectrometry (GC/MS), two-dimensional GC-time of flight mass spectrometry (GC × GC-TOFMS), and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). This review focuses on characterizing hydrocarbon, oxygen-containing, nitrogen-containing, sulfur-containing, and halogen-containing chemicals in various CDLs with these three mass spectrometry techniques. Small molecular (< 500 u), volatile and semi-volatile, and less polar chemicals in CDLs have been identified with GC/MS and GC × GC-TOFMS. By equipped with two-dimensional GC, GC × GC-TOFMS can achieve a clearly chromatographic separation of complex chemicals in CDLs without prior fractionation, and thus can overcome the disadvantages of co-elution and serious peak overlap in GC/MS analysis, providing much more compositional information. With ultrahigh resolving power and mass accuracy, FT-ICR MS reveals a huge number of compositionally distinct compounds assigned to various chemical classes in CDLs. It shows excellent performance in resolving and characterizing higher-molecular, less volatile, and polar chemicals that cannot be detected by GC/MS and GC × GC-TOFMS. The application of GC × GC-TOFMS and FT-ICR MS to chemical characterization of CDLs is not as prevalent as that of petroleum and largely remains to be developed in many respects. © 2016 Wiley Periodicals, Inc. Mass Spec Rev 36:543-579, 2017.

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

Cited by 144 publications

References 27 publications

An ionic liquid extraction process for the separation of indole from wash oil

An ionic liquid extraction process for the separation of indole from wash oil

Pretreatment of coal by ionic liquids towards coal electrolysis liquefaction

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

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