Recovery of amino acids by imidazolium based ionic liquids from aqueous media

Wang, Jianji; Pei, Yuanchao; Zhao, Yang; Hu, Zhiguo

doi:10.1039/b415842c

Cited by 207 publications

(162 citation statements)

References 34 publications

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“…34 The IL-based ABS are thus far more efficient for L-tryptophan separation than conventional ABS. Table 3 Wang and co-workers 35 reported the extraction of amino acids from an aqueous phase using hydrophobic water-immiscible ILs. The results obtained in this work show that the magnitudes of L-tryptophan partition coefficients using IL-based ABS can be as much as 1000 times larger compared to the water-immiscible ILs results.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Cation Influence on the Formation and Extraction Capability of Ionic-Liquid-Based Aqueous Biphasic Systems

et al. 2009

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In addition to the large range of applications proposed in literature, ionic liquids (ILs) have been recently reported to be able to form aqueous biphasic systems (ABS). They could thus be interesting media in biotechnological applications for the separation and purification of vital biomolecules. Therefore, in this work, a systematic study involving a large number of imidazolium-based ILs was conducted to provide new information related to ILs' ABS-promoting capability and extraction ability. For that purpose, the influence of the number of alkyl groups present at the cation, the cation side alkyl chain length, and the presence of double bonds, aromatic rings, and hydroxyl groups on this alkyl chain were evaluated. Ternary phase diagrams of the ABS formed by these ILs and K 3 PO 4 and the respective tie-lines were measured and presented. The ABS here investigated were further characterized for the first time accordingly to their extractive potential for amino acids, where L-tryptophan was selected as a model biomolecule. The partition coefficients here obtained were shown to be substantially larger than those observed in conventional ABS, demonstrating therefore the fine potential of IL-based ABS for biomolecules separation and purification.

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Section: Resultsmentioning

confidence: 99%

Evaluation of Cation Influence on the Formation and Extraction Capability of Ionic-Liquid-Based Aqueous Biphasic Systems

et al. 2009

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“…The effect of temperature on the partition coefficients of vanillin was studied with four ILs: [C 4 [20,23,[35][36], using IL-based ATPS, the temperature was shown to be either a negligible or a significant factor in the extraction of various types of biomolecules. While He et al [20] indicated that temperature had not significant influence on the distribution behavior of steroids, Pei et al [23], on the other hand, reported that temperature greatly influences the extraction efficiency of proteins.…”

Section: Effect Of Temperature In Vanillin Partitioningmentioning

confidence: 99%

Extraction of vanillin using ionic-liquid-based aqueous two-phase systems

Cláudio

Freire

et al. 2010

Separation and Purification Technology

183

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a b s t r a c tTo explore proper extractive solvents and to design an optimized separation process it is highly imperative to understand the molecular-based phenomena governing the solutes partitioning. Moreover, the development of new techniques for the biomolecules separation and purification, while maintaining their functional characteristics unchanged, is still ongoing. Therefore, in this work, the partition coefficients of vanillin, a compound with well-known organoleptic properties, were determined using improved ionicliquid-based aqueous two-phase systems (ATPS). Three main parameters were evaluated through the vanillin partitioning process: the ionic liquid (IL) cation and anion structure, the temperature of equilibrium and the available concentration of vanillin in the global system. In all systems and conditions tested, vanillin preferentially migrates for the IL-rich phase. In addition, the three studied parameters largely influence the vanillin partitioning. In an attempt to elucidate the thermodynamics of the partitioning process, the standard molar thermodynamic functions of transfer of vanillin were also determined based on the temperature dependence data. These data indicate that the partition of vanillin results from an interplay between enthalpic and entropic contributions where both the IL anion and more complex cations play an essential role. Moreover, viscosities and densities of both aqueous phases were experimentally measured at the mass fraction compositions for which the partition coefficients were determined. The results gathered in this work indicate that IL-based ATPS can be further employed in the extraction and purification of vanillin from different matrices, as confirmed by the large partition coefficients obtained and improved low viscosity systems.

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“…They possess two main characteristics that qualify them as promising alternatives to classical (toxic) solvents: i) negligible vapour pressures in a wide temperature range [2,3] thus providing low atmospheric pollution and ii) diverse solvent power -they dissolve well a number of both polar and non-polar solutes, as it was reported [4] and reviewed in literature [5,6]. Therefore, ionic liquids found their applications as separation/extraction solvents for diverse solutes: for amino acids separation and purification [7][8][9], carbohydrate separation [10], for extraction of proteins [11], phenols [12], azo dyes [13], or for removal of free fatty acids [14].…”

Section: Introductionmentioning

confidence: 99%

Excess molar volumes and viscosity behaviour of binary mixtures of aniline/or N,N-dimethylaniline with imidazolium ionic liquids having triflate or bistriflamide anion

Soldatović¹,

Vuksanović

Radović

et al. 2017

The Journal of Chemical Thermodynamics

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In this study, densities and viscosities of four binary systems {aniline / N, N-dimethylaniline+1- Also, enthalpic and entropic parts of the ∆G *E function were determined, at the same composition, for three studied systems that exhibit complete miscibility, since {aniline + [bmim][OTf]} is a partially miscible system. Considering the calculated thermodynamic properties, molecular interactions in the investigated binary systems were analysed and are discussed.

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Recovery of amino acids by imidazolium based ionic liquids from aqueous media

Cited by 207 publications

References 34 publications

Evaluation of Cation Influence on the Formation and Extraction Capability of Ionic-Liquid-Based Aqueous Biphasic Systems

Evaluation of Cation Influence on the Formation and Extraction Capability of Ionic-Liquid-Based Aqueous Biphasic Systems

Extraction of vanillin using ionic-liquid-based aqueous two-phase systems

Excess molar volumes and viscosity behaviour of binary mixtures of aniline/or N,N-dimethylaniline with imidazolium ionic liquids having triflate or bistriflamide anion

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