Intensification of High Boiling Point Organic Solvents on SO2 Absorption in Deep Eutectic Solvents Formed by Hydroxypyridine and 1-Butyl-3-methylimidazolium Chloride was written by Jiang, Bin;Zhang, Congcong;Tantai, Xiaowei;Yang, Na;Zhang, Luhong;Sun, Yongli;Xiao, Xiaoming. And the article was included in Journal of Chemical & Engineering Data.Related Products of 626-64-2 This article mentions the following:
A series of hydrogen bond donors (HBDs) functionalized deep eutectic solvents (DESs) containing both phys. and chem. action sites were synthesized by hydroxypyridine with different structures and proportions plus 1-butyl-3-methylimidazolium chloride (BmimCl). The effects of temperature, partial pressure, HBDs structure, and water content on SO2 absorption were investigated, and 4-hydroxypyridine (4-Op)/BmimCl (1:2) exhibited the highest SO2 absorption capacity. In order to decrease the viscosity of absorbent and increase the applicability of 4-Op/BmimCl (1:2), the SO2 absorption capacities in four hybrid absorbents based on 4-Op/BmimCl (1:2) and four high b.p. organic solvents [sulfone, DMSO, N-methylpyrrolidone (NMP), and 1-methylimidazole (NMI)] were further studied and compared. 4-Op/BmimCl (1:2)-(NMI) showed the best absorption performance; the addition of NMI significantly decreased the viscosity of the absorbent, and the absorption capacity of absorbent was also improved compared with that of pure 4-Op/BmimCl (1:2) absorbent. The SO2 absorption capacity of hybrid absorbents (mass fraction of NMI 闂?= 0.3) could reach 1.23 g SO2/g absorbent at 100 kPa SO2 and 293.15 K, and the viscosity of the absorbent before absorption was only 12 mPa闁荤姾娅ｅ鈧?at 298.15 K. The gravimetric absorption capacity and desorption performance of hybrid absorbents did not change in the continuous absorption-desorption cycle experiments Furthermore, the results of quantum chem. calculation and spectral anal. showed that there were physicochem. mixing interactions between pure DESs and SO2. In the experiment, the researchers used many compounds, for example, Pyridin-4-ol (cas: 626-64-2Related Products of 626-64-2).
Pyridin-4-ol (cas: 626-64-2) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the 闂?bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the 闂?bonds. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Related Products of 626-64-2