Extraction of metal ions in aqueous polyethylene glycol–inorganic salt two-phase systems in the presence of inorganic extractants: Correlation between extraction behaviour and stability constants of extracted species

Microwave-Assisted Extraction of Polysaccharides

“…Recently, the use of aqueous polyethylene glycol solutions has also been proposed for the extraction of polysaccharides from Pericarpium granati (Zhou et al 2014). Although yields were not notably high, this solvent could be a good alternative to other more aggressive solvents considering its biodegradability, low flammability, nonvolatility, and stability at high temperature (Bulgariu and Bulgariu 2008).…”

Extraction of gold(III) from chloride media in aqueous polyethylene glycol-based two-phase system

“…Starting from the preparation way, it can be noted that the main advantages of the aqueous two-phase systems over traditional extraction systems are: (i) in the formation of extraction system no addition of organic solvents are required; (ii) the phase-forming components (PEG and inorganic salt) are not very expensive and commercially available; (iii) several common anions (halide and pseudo-halide ions) can be used as extracting agents [19]. On the basis of these considerations, the aqueous PEG-based two-phase systems can be considered virtually non-toxic, non-flammable and non-volatile, being environmentally friendly.…”

Carbohydrates-tailored phase tunable systems composed of ionic liquids and water

“…Liquid-liquid extraction is a favorable choice among a variety of separation techniques. Conventional extraction processes are mainly performed using organic solvents as extractants to form two-phase systems [2] and using inorganic salts [3][4][5] or surfactants [6,7] for tailoring the phase separation so as to improve the separation efficiency. Recently, ionic liquids (ILs) have been shown great potential for replacing conventional organic solvents [8][9][10] as extractants and/or phase tunable additives.…”