Density, viscosity and excess properties for binary mixtures of 2-(ethylamino)ethanol and 2-(butylamino)ethanol with 2-butoxyethanol at temperatures from (293.15 to 353.15) K

Solubility of N2O and CO2 in 2-Butoxyethanol, 2-(Butylamino)ethanol, and Their Binary Blends

“…It can be found that Henry’s law constants of N 2 O have an approximately linear increase with the concentration of BAE in the binary blends and show more sensitive to the temperature as expected, which indicate that N 2 O solubility decreases with the increase in temperature and BAE concentration. In our previous work, the excess molar volume V E for the BAE/2-BE blends was observed negative over the entire composition range and the minimum value appeared at approximately x 1 ≈ 0.40–0.50. The negative V E indicates the volume contraction on mixing of BAE and 2-BE, resulting in less free space to hold the N 2 O and an increase in H N2O .…”

“…The more polar BAE molecule possesses secondary amine group (−NH) and hydroxyl group (−OH), which can form intermolecular/intramolecular hydrogen bonding. BAE has much higher viscosity than 2-BE at the same conditions, 31 suggesting that BAE molecules have stronger self-association ability than 2-BE through intermolecular forces. Thus, the weak interactions of N 2 O with BEA may lead to a decrease of N 2 O solubility.…”

Solution Thermodynamic Properties of {Tetrabutyl Ammonium Bromide:Glycerol} Hydrophilic DESs at T = 298.15–348.15 K and 0.1 MPa and an Approach over Solvent Extraction of Cr(VI) Using {Tetrabutyl Ammonium Bromide:Decanoic Acid/Oleic Acid} Hydrophobic DESs

“…The broader peak O–H stretching band red-shifted from 3331 to 3327 cm –1 due to the addition of glycerol molecules in DES 1 and DES 2 , respectively. , In DES 1 and DES 2 , the methyl symmetric C–H stretching vibrations were observed in 2960 cm –1 . , The methyl asymmetric C–H stretching vibrations of the −CH 3 groups are noted around 2875 cm –1 in all DESs due to common HBA . Similarly, the symmetric C–H stretching was observed at 2935 cm –1 in DES 1 and DES 2 ; meanwhile, the peak red-shifts to 2926 and 2924 cm –1 with the addition of decanoic acid and oleic acid with HBA. ,, The negative shift (δν) cm –1 suggests the strength of intermolecular interactions between unlike molecules . The peak for symmetric stretching of −CH 2 in carboxylic acids was positioned at 2854 cm –1 in all DESs except DES 1 and DES 2 .…”

“…28,31,32 The negative shift (δν) cm −1 suggests the strength of intermolecular interactions between unlike molecules. 33 The peak for symmetric stretching of −CH 2 in carboxylic acids was positioned at 2854 cm −1 in all DESs except DES 1 and DES 2 . No strong peaks were found between (2000−1500) cm −1 and (2500−2000) cm −1 , which confirms that no double or triple bonds exist or form in DES 1 and DES 2 , respectively.…”

“…Several factors affect the sign and magnitude of V m E such as (i) chemical or specific interactions such as hydrogen bonding and dipole–dipole interactions between dissimilar molecules; (ii) structural fitting of components resulting in a more compact structure; (iii) physical interactions like dispersion forces; and (iv) disruption of liquid order or loss of dipolar association in the pure liquids on mixing …”