Application of Ionic Liquids in Separation and Fractionation Processes


Research on the extraction and separation of value-added products from biomass has been a hot topic in the framework of biorefinery aiming a sustainable conversion of biomass into chemicals, materials, energy, and fuels. However, a complete use of the biomass potential is still limited by the lack of cost-effective extraction and separation processes. In the last years, a large number of studies on the application of ionic liquids (ILs) as alternative solvents for the extraction and separation of several bioactive compounds, for instance, alkaloids, antioxidants, phenolic/polyphenolic compounds, saponins, anthraquinones, and isoflavones from biomass, have been reported. Based on an extended compilation and analysis of the data hitherto reported, this entry provides an overview on the use of ILs in the extraction and separation of value-added compounds from natural sources. An overview on the use of solid-liquid and liquid-liquid extraction techniques for such purposes is outlined, highlighting and discussing the most relevant works in this area. New insights and directions to follow in IL-based processes within the biorefinery framework are suggested.


Capela, EV; Coutinho, JAP; Freire, MG

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