Effect of ionic liquids as adjuvants on PEG-based ABS formation and the extraction of two probe dyes

Partition study of textile dye Remazol Yellow Gold RNL in aqueous two-phase systems

“…A significant transfer of dyes to the upper phase of the ATPS was observed and thus demonstrating the potential of these systems for purification applications. ATPS systems formed by potassium salts and polyethylene glycol (PEG) using ionic liquids as adjuvant have also been reported by Souza et al [16] for the partitioning of dyes chloranilic acid and rhodamine 6G. Recently, Ferreira et al [4] achieved extraction efficiencies of 100% when employing IL-ATPS for the extraction of dyes chloranilic acid, indigo blue and sudan III.…”

Aqueous two-phase systems based on cholinium salts and tetrahydrofuran and their use for lipase purification

“…Aqueous solutions of each cholinium (from 20 wt% to 60 wt%) and of THF (from 80 wt% to pure THF) were initially prepared and used for the determination of the binodal curves at 25 ± 1 ºC and atmospheric pressure, through the cloud point titration method [18], and the results are shown in Fig. 2.…”

“…ATPS formed of polymers (namely polymer-polymer, or polymer-salt) are well-known for advantages, such as low interfacial tension, good biocompatibility, fast and high phase separation rates and low cost [8,12]. However, their performance is significantly affected due to the small difference in polarity between the coexisting phases [18]. Currently, the number of systems capable of forming two aqueous phases is increasing and the alternatives include the use of alcohol/salt [19][20][21], acetonitrile/carbohydrates [22,23], polymers(polyvinyl alcohol -PVA)/dextran [24] and other combinations including ionic liquids (ILs) [25,26].…”

Extração De Antioxidantes Utilizando Sistemas Aquosos Bifásicos Com Líquidos Iônicos Como Adjuvante

“…As concentrações dos constituintes utilizados para formar duas fases aquosas imiscíveis foram confirmadas pelos diagramas de fases descritos por Souza et al (2014). Os sistemas foram mantidos a 25ºC durante 12 horas para atingir o equilíbrio.…”