An inclusive thermophysical and rheology portrayal of deep eutectic solvents (DES) for metal oxides dissolution enhancement

Status and advances of deep eutectic solvents for metal separation and recovery

“…In general, the densities and molar volumes of DESs decrease and increase linearly, respectively, with increasing temperature. 89,90…”

“…85,115 The ChCl-based hydrophilic DESs with urea, carboxylic acid ( e.g. , malonic acid or citric acid), and EG as HBDs have exhibited great performance for dissolution and leaching of various commonly available metal oxides, 89,116 precious metals ( e.g. , Au) 117 and valuable rare earth elements ( e.g.…”

Design and thermophysical characterization of betaine hydrochloride-based deep eutectic solvents as a new platform for CO2 capture

“…The storage (G 0 ) and loss (G 00 ) moduli were obtained from oscillatory measurements. 37 The refractive index (n D ) of the prepared DESs was measured using an automated digital refractometer (Model: Abbemat 300, Anton Paar). This device exhibit highly thermostat control (AE 0.01 K) Thereby the standard uncertainties in the n D and T were assessed as AE0.0004 and AE0.02 K, respectively.…”

“…The temperature of decomposition (T dec ) is noteworthy as it defines the highest temperature at which DESs retain their liquid phase despite decomposition and hence are used as solvents. 37 Reported studies have shown that the thermal stability is strongly governed by several factors such as the nature of HBA and HBD, the varying alkyl chain length of the HBD, the kind of interaction, etc. For instance, a detailed study on the thermal stability of ChCl-based DES has been addressed by Garcı ´a et al 49 and Florindo et al 41 reported the thermal stability of ChCl-based DES composed with several HBDs and concluded the role of HBD in terms of their functional group and chain length that directly governs the thermal stability.…”

“…Newton-Laplace equation (eqn (4)) relates the external temperature and pressure, which change within each microscopic volume while entropy remains constant due to the low-frequency sound wave (B3 MHz frequency). 37,42…”