Separation of phenol from model oils with quaternary ammonium saltsvia forming deep eutectic solvents

Guo, Wu‐Jie; Hou, Yucui; Wu, Wei; Ren, Shuhang; Tian, Shidong; Marsh, Kenneth N.

doi:10.1039/c2gc36602a

Cited by 233 publications

(131 citation statements)

References 21 publications

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“…The results indicate that [Bmim]Cl equal to phenol, in moles, was a sufficient amount to extract phenol from hexane. In our previous work, 5,6 quaternary ammonium salts show the same phenomena as [Bmim]Cl. The halogen anion of quaternary ammonium salts plays a main role in extracting phenol from hexane by hydrogen bonding between the OH functional group of phenol and the halogen anion.…”

Section: Resultsmentioning

confidence: 69%

Separation of Phenols from Oil Using Imidazolium-Based Ionic Liquids

Hou

Ren

Wei

et al. 2013

Ind. Eng. Chem. Res.

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109

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Phenolic compounds, which are important substances in industry, are mainly derived from coal liquefaction oil, coal tar, and petroleum, and also from biomass via pyrolysis. However, the traditional process of separation of phenols from oil using water, NaOH, and H 2 SO 4 causes serious environmental problems. In this work, imidazolium-based ionic liquids (ILs) were used to extract phenol from a model oil of hexane and phenol in order to reduce environmental risk. It was found that these ILs could successfully separate phenols from hexane, and a small amount of [Bmim]Cl, equimolar to that of phenol in hexane, was enough to extract phenol with a high extraction efficiency of 99%. Anions of imidazolium-based ILs have a significant influence on the phenol extraction efficiency, which follows the order: Cl − > Br − > BF 4 − > PF 6 − . But the cation of these ILs shows a relatively small influence on the extraction. Particularly, [Bmim]Cl shows best performance in terms of phenol extraction efficiency. Furthermore, it is not sensitive to temperature changes and can be performed at ambient temperature. The extracted phenol in ILs could be recovered by evaporation, and the regenerated ILs could be reused for four cycles with no obvious loss in the phenol extraction efficiency. [Bmim]Cl was also used to extract phenols from real coal liquefaction oil, and the extraction efficiency of phenols could reach 90%.

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Section: Resultsmentioning

confidence: 69%

Separation of Phenols from Oil Using Imidazolium-Based Ionic Liquids

Hou

Ren

Wei

et al. 2013

Ind. Eng. Chem. Res.

Self Cite

109

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“…The scope of HBD has been expanded to include alcohols [18], sugars [19], organic acids [20], and amides [21], while HBA merely focuses on quaternary ammonium salts [22,23] and quaternary phosphium salts [24]. DESs were also widely used as media in chemical reaction [25][26][27], electro-deposition [28,29] and extraction separation [30][31][32][33] with encouraging results. Recent works explored the possibility of DESs as the absorbents for CO 2 capture.…”

Section: Introductionmentioning

confidence: 96%

Solubilities of carbon dioxide in the eutectic mixture of levulinic acid (or furfuryl alcohol) and choline chloride

Han

Jiang

et al. 2015

The Journal of Chemical Thermodynamics

137

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“…Some other DESs based on ChCl were formed with malonic acid at 0°C, phenol at − 40°C, and glycerol at − 35°C [5]. ChCl could form DES with different phenols [10] and could be used to separate phenols from oil with high efficiencies [11,12]. Recently DESs based on phosphonium-based salts have attracted much attention.…”

Section: Introductionmentioning

confidence: 98%