Jump to main content
Jump to site search

Issue 12, 2014
Previous Article Next Article

Ionic liquid solutions as extractive solvents for value-added compounds from biomass

Author affiliations

Abstract

In the past few years, the number of studies regarding the application of ionic liquids (ILs) as alternative solvents to extract value-added compounds from biomass has been growing. Based on an extended compilation and analysis of the data hitherto reported, the main objective of this review is to provide an overview on the use of ILs and their mixtures with molecular solvents for the extraction of value-added compounds present in natural sources. The ILs (or IL solutions) investigated as solvents for the extraction of natural compounds, such as alkaloids, flavonoids, terpenoids, lipids, among others, are outlined. The extraction techniques employed, namely solid–liquid extraction, and microwave-assisted and ultrasound-assisted extractions, are emphasized and discussed in terms of extraction yields and purification factors. Furthermore, the evaluation of the IL chemical structure and the optimization of the process conditions (IL concentration, temperature, biomass–solvent ratio, etc.) are critically addressed. Major conclusions on the role of the ILs towards the extraction mechanisms and improved extraction yields are additionally provided. The isolation and recovery procedures of the value-added compounds are ascertained as well as some scattered strategies already reported for the IL solvent recovery and reusability. Finally, a critical analysis on the economic impact versus the extraction performance of IL-based methodologies was also carried out and is here presented and discussed.

Graphical abstract: Ionic liquid solutions as extractive solvents for value-added compounds from biomass

Back to tab navigation

Publication details

The article was received on 12 Feb 2014, accepted on 28 Jul 2014 and first published on 28 Jul 2014


Article type: Critical Review
DOI: 10.1039/C4GC00236A
Author version
available:
Download author version (PDF)
Citation: Green Chem., 2014,16, 4786-4815
  •   Request permissions

    Ionic liquid solutions as extractive solvents for value-added compounds from biomass

    H. Passos, M. G. Freire and J. A. P. Coutinho, Green Chem., 2014, 16, 4786
    DOI: 10.1039/C4GC00236A

Search articles by author

Spotlight

Advertisements