Ionic liquids for two-phase systems and their application for purification, extraction and biocatalysis

Area of Science:

• Biotechnology
• Green Chemistry
• Separation Science

Background:

• Ionic liquids (ILs) are molten salts with unique properties like nonflammability and nonvolatility, making them attractive alternatives to traditional organic solvents.
• Two-phase systems, including aqueous two-phase systems (ATPS), are crucial for product separation in biotechnological processes.
• The integration of ILs into these systems offers potential for enhanced selectivity and environmental benefits.

Purpose of the Study:

• To review recent advancements in the application of IL-based two-phase systems and ATPS in biotechnology.
• To elucidate the fundamental driving forces behind selective product extraction using IL-based ATPS.
• To assess the environmental profile, including ecotoxicity, of ILs in biotechnological applications.

Main Methods:

• Review of current literature on IL-based two-phase systems and ATPS in biotechnology.
• Analysis of experimental data to understand extraction mechanisms and optimize system parameters.
• Evaluation of ecotoxicity data for various ionic liquids.

Main Results:

• Ionic liquids can be effectively utilized in both hydrophobic and hydrophilic two-phase systems as replacements for organic solvents.
• IL-based ATPS demonstrate potential for selective extraction of target products in biotechnological processes.
• The negligible vapor pressure of ILs contributes to their 'green' aspect, though ecotoxicity requires careful consideration.

Conclusions:

• Ionic liquids represent a promising class of solvents for developing novel and sustainable biotechnological separation processes.
• Further research is needed to optimize IL-based systems for specific applications and fully understand their environmental impact.
• The unique properties of ILs facilitate efficient product recovery and align with green chemistry principles.