A literature review and critical analysis of the use ionic liquids for extraction value-added compounds from biomass.

Deep eutectic solvents (DES) have emerged in the past few years as a new class of with promising applications several fields. In present work, application DES (formed by binary mixtures cholinium chloride and carboxylic acids or urea) phase-forming components aqueous biphasic systems (ABS) is investigated. The mechanisms associated phases demixing ABS composed DES, well stability solutions, are investigated to address critical question whether DES-based fact ternary quaternary mixtures. It...

Ionic liquids (ILs) with improved hydrogen-bonding acceptor abilities, such as acetate-based compounds, have shown great potential for CO2 capture and biomass dissolution. In this context, the knowledge of thermophysical properties fluids is essential design scale-up related processes. However, at stage, ILs are still poorly characterized. work, four properties, specifically, density, viscosity, refractive index, surface tension, were determined five ILs. Both protic aprotic investigated,...

Waste electrical and electronic equipment (WEEE) is the fastest growing type of waste globally an important challenge due to its heterogeneity, intrinsic toxicity potential environmental impact. However, WEEE also represents secondary source critical valuable elements must be viewed as a resource within context circular economy. The use ionic liquids (ILs) recover metals from reviewed with special emphasis on ILs in leaching solvent extraction processes. advantages reaction medium compared...

Marine-derived food wastes mainly include seafood, fish and feed production resources. From the crustaceans traded annually, 6 to 8 million tonnes of valuable shrimp, lobster and/or crab shells waste are produced worldwide. In this systemic work, researchers with complementary technical expertise, covering fields chemical engineering design, chemistry, materials, predictive environmental sciences economy, worked together develop a sustainable multiproduct pipeline for biorefinery unwanted...

The industrial application of ionic liquids (ILs) requires the knowledge their physical properties and phase behavior. This work addresses experimental determination vapor–liquid equilibria (VLE) binary systems composed water + imidazolium-based ILs. ILs under consideration are 1-butyl-3-methylimidazolium trifluoromethanesulfonate, thiocyanate, tosylate, trifluoroacetate, bromide, chloride, methanesulfonate, acetate, which allows evaluation influence IL anion through Isobaric VLE data were...

Abstract The ability to induce reversible phase transitions between homogeneous solutions and biphasic liquid-liquid systems, at pre-defined suitable operating temperatures, is of crucial relevance in the design separation processes. Ionic-liquid-based aqueous systems (IL-based ABS) have demonstrated superior performance as alternative extraction platforms their thermoreversible behaviour here disclosed by use protic ILs. applicability temperature-induced switching further with complete two...

The use of deep eutectic solvents (DES) as phase forming components aqueous biphasic systems (ABS) has been proposed. However, it was shown that when dissolved in solutions, the DES complexes are destroyed and a nonstoichiometric partition hydrogen-bond acceptor (HBA) donor (HBD) between phases ABS is observed. Aiming at evaluating possibility to create which integrity can be maintained, composed poly(propylene)glycol mixtures cholinium chloride, HBA, glucose, HBD, were investigated. results...

Recycling spent lithium-ion batteries is vital to ensure the recovery of added-value resources and minimize environmental impact. Herein, an integrated efficient process developed for metal from cathode powder combining both leaching transition separation in one step. A hydrophobic deep eutectic solvent (DES) proposed as a HCl super concentrator one-pot cathodes simultaneous Ni(II) precipitation. The DES composed decanoic acid trioctylphosphine oxide can concentrate HCl, 2.2-folds more than...

Hydrophobic eutectic solvents (HES) emerged as promising substitutes to the conventional organic phase used in solvent extraction (SX) of metal ions due avoidance diluents and suppression third-phase manifestation. However, HES present a highly structured liquid defined by hydrogen-bonded interactions such that intercomponent are expected play greater role SX using compared diluted extractant solution. In this work, lanthanides from nitrate media non-ideal composed decanoic acid (C10OOH)...

Precipitation processes, if selective, present a simple and economical alternative for the recovery of critical metals from primary secondary ores including electronic wastes. In this work, gold by precipitation both mono-elemental solutions real CPU leach solution was demonstrated using hydrophilic quaternary ammonium salts. The yield is shown to be dependent on apolar volume precipitant, with addition tetrabutylammonium-based salts resulting in over 90 % synthetic solutions. origin...

Bisphenol A is a human endocrine disruptor. Its normally low levels in biological fluids make it difficult to detect via conventional techniques. This work demonstrates the complete extraction of bisphenol A, and its possible concentration up 100-fold single-step procedure, using ionic-liquid-based aqueous biphasic systems.

Due to their unique properties, in recent years, ionic liquids (ILs) have been largely investigated the field of analytical chemistry. Particularly during last sixteen they successfully applied chromatographic and electrophoretic analysis value-added compounds extracted from biomass. Considering growing interest use ILs this field, critical review provides a comprehensive overview on improvements achieved using as constituents mobile or stationary phases techniques, namely capillary...

An integrated biocatalysis-separation process: the reaction step occurs in a homogeneous medium, followed by enzyme and product separation liquid–liquid system promoted temperature changes.

A sustainable process for keratin recovery from chicken feathers using a bio-based ionic liquid was developed. The minimum selling price calculated is 22 $ per kg, suitable biomedical and cosmetic applications.

Aqueous biphasic systems composed of ionic liquids allow a single-step extraction–concentration ethinylestradiol (EE2) from wastewater up to 1000-fold.

The use of macroalgae, microalgae and cyanobacteria for metal sorption has been widely reported. Still, there are no studies allowing a direct comparison the performance these biomasses, especially while evaluating competition. simultaneous Co2+, Cu2+, Ni2+ Zn2+ present in multi-elemental solution by six two three was evaluated. Brown macroalgae were shown to be most promising biosorbent, with Undaria pinnatifida having total capacity 0.6 mmol g-1. Overall, performed better than microalgae,...

Ionic-liquid-based aqueous biphasic systems (IL-based ABS) have been largely investigated as promising extraction and purification routes. In this context, the determination of their phase diagrams physical properties coexisting phases are high relevance when envisaging large-scale applications. Low viscosities improve mass transfer reduce energy consumptions, while knowledge on densities is important for equipment design. work, novel solutions imidazolium-based ILs combined with...

Deep eutectic solvents (DES) are an emerging type of green that have been used in aqueous two-phase systems (ATPS). However, its application ATPS can present some limitations, due to the nonstoichiometric partition between two phases hydrogen-bond acceptor (HBA) and donor (HBD) compose DES. In this context, pseudoternary DES-based ATPS, which DES' components stoichiometry is maintained, appear as potential liquid–liquid extraction separation biomolecules. Here pH influence on phase...

An acidic aqueous biphasic system (AcABS), in which the inorganic salt component of a traditional (ABS) is replaced by acid inherently present typical hydrometallurgical leachate solution, shown to selectively separate cobalt from nickel, separation relevant recycling nickel metal hydride (NiMH) batteries. To overcome limitation electrodeposition presence high concentration, mixed ABS–AcABS approach developed HCl partially substituted addition predictable amount NaCl. This synergistic...