In this work the use of glycerol as a hydrogen bond donor in Deep Eutectic Solvents is studied. The physical properties choline chloride mixtures with are quantified and it shown that eutectic can circumvent some difficulties using solvent viz. high viscosity melting point. characterised polarity parameters values similar to other ionic liquids although procedure poor method characterising Lewis basicity. application these esterification used demonstration ability tune reaction quaternary...

Eutectic mixtures of quaternary ammonium salts with Lewis or Brønsted acids have been described as ionic liquid, but doubt exists over the compositional range for which this description is valid. In current work, conductivity, viscosity, density, and surface tension a number glycolic choline chloride are measured mole fraction 0 to 0.33. The data fitted hole theory, it proposed that composition at conductivity matches theoretical value point mobility becomes dominant mechanism charge...

Deep Eutectic Solvents (DESs) are a novel class of solvents with potential industrial applications in separation processes, chemical reactions, metal recovery and finishing processes such as electrodeposition electropolishing. Macroscopic physical properties viscosity, conductivity, eutectic composition surface tension already available for several DESs, but the microscopic transport this compounds not well understood literature lacks experimental data that could give better insight into...

A Lewis basic mixture of quaternary ammonium salts with glycerol has been used to extract excess from biodiesel formed the reaction triglycerides ethanol in presence KOH. The effect cation on partition coefficient was determined, together time taken for systems reach equilibrium. Protocols were also investigated separation salt mixtures.

Pulsed field gradient (PFG) NMR has been used to probe self-diffusion of molecular and ionic species in aqueous mixtures choline chloride (ChCl) based deep eutectic solvents (DESs), order elucidate the effect water on motion inter-molecular interactions between different mixtures, namely Ch(+) cation hydrogen bond donor (HBD). The results reveal an interesting complex behaviour such at a level. In general, it is observed that hydroxyl protons ((1)H) have diffusion coefficients significantly...

The processing of ore by hydrometallurgy or pyrometallurgy typically has a high energy demand, and associated release carbon dioxide. Thus there is need to develop more energy-efficient environmentally-compatible processes. This article demonstrates that deep eutectic solvent (DES) ionic liquids provide one such method since they can be used selectively dissolve recover native gold tellurium, sulphides tellurides. Ionic are anhydrous salts liquid at low temperature. They powerful solvents...

Water miscible ionic liquids and deep eutectic solvents have useful properties that make them suitable for lubricants especially in marine environments.

The present paper describes the design and operation of first large-scale extraction separation metals from a complex matrix using an ionic liquid. liquid was deep eutectic solvent based on choline chloride. hydrogen-bond donors were mixed to optimize solubility fluid viscosity. It found that incorporation fine particulate dust actually decreased viscosity fluid. shows selective zinc lead can be achieved through judicious choice donor it is also shown in solution separated cementation with...

The electrodeposition of chromium is a technologically vital process, which principally carried out using aqueous chromic acid. In the current study, it shown that eutectic mixtures urea and hydrated chromium(III) chloride provide liquid reduces toxicological issues associated with Cr(VI) electroplating solution. Using EXAFS, mass spectrometry UV-Vis spectroscopy, present predominantly as cationic species. Conductivities are higher than for most comparable ionic liquids. It electrochemically...

The electrodeposition of aluminium is demonstrated using a eutectic mixture chloride and urea the use protective alkane layer enable to be deposited under ambient conditions.

Organic and inorganic additives are often added to nickel electroplating solutions improve surface finish, reduce roughness promote uniform morphology of the coatings. Such usually small molecules referred as brighteners or levellers. However, there have been limited investigations into effect such on electrodeposition from ionic liquids (ILs) deep eutectic solvents (DESs). Here we study four electrolytic plating an ethyleneglycol based DES; these nicotinic acid (NA), methylnicotinate (MN),...

The use of iodine as an electrocatalyst in metal dissolution and recovery is demonstrated with three types substrate; brass, GaAs a gold ore.

Solution pH plays an important role in structure and dynamics of biomolecular systems; however, effects cannot be accurately accounted for conventional molecular simulations based on fixed protonation states. Continuous constant (CpHMD) the λ-dynamics framework calculates states fly during dynamical simulation at a specified condition. Here we report CPU-based implementation CpHMD method GBNeck2 generalized Born (GB) implicit-solvent model pmemd engine Amber package. The performance was...

Copper can be extracted from the main copper mineral, chalcopyrite, without formation of hydrogen sulfide or sulfur dioxide.

This paper describes a research platform approach that has been developed in England to bring together researchers and stakeholders from wide range of institutions undertake multi-disciplinary, catchment-scale on approaches tackle agricultural water pollution.

Significance The solvation free energy of a molecule includes the required to remove solvent from what will become molecular interior and gained dispersive interactions between solute solvent. Traditionally, these energies have been assumed be proportional surface area molecule. However, we computed for series alkanes four configurations decaalanine showed that although were linear in each set molecules, atom’s contributions depended on correlations with its surrounding atoms. atomic...

Processing sulfur containing minerals is one of the biggest sources acute anthropogenic pollution particularly in form acid mine drainage.

Currently, the high demand for copper is in direct contrast with decrease mineral grade and, more significantly, concerns regarding environmental impact that arise as a result of processing such low-grade materials. Consequently, new concepts are needed. This work explores chemical dissolution chalcopyrite concentrate at ambient pressure and moderate temperatures deep eutectic solvent. Copper iron dissolved without changing their oxidation state, solvent pH change, stabilized chloride...