Studies on dissolution of carbohydrates in ionic liquids and extraction from aqueous phase
作者:Andreia A. Rosatella、Luis C. Branco、Carlos A. M. Afonso
DOI:10.1039/b900678h
日期:——
An extended study on the solubility of the carbohydrates glucose, fructose, sucrose and lactose in twenty eight different ionic liquids (ILs) was performed. These ILs were based on the combination of tetraalkylammonium, tetraalkylphosphonium, 1-methyl-3-alkylimidazolium and dimethyl-tetraalkylguanidinium cations containing alkyl and ether pendant substituent groups, and anions of chloride, dicyanamide, saccharine, acesulfame, acetate or thiocyanate. It was possible to achieve solubilities, at 35 °C, of each carbohydrate up to 43.9, 49.0, 17.1 and 16.6% (g of carbohydrate per 100 g of IL), respectively. The possibility to extract carbohydrates from an aqueous phase by hydrophobic ILs was also demonstrated. Besides, some selectivity for a mixture of two carbohydrates was also observed.
对碳水化合物葡萄糖、果糖、蔗糖和乳糖在 28 种不同离子液体 (IL) 中的溶解度进行了深入研究。这些离子液体基于含有烷基和醚侧取代基的四烷基铵、四烷基鏻、1-甲基-3-烷基咪唑鎓和二甲基-四烷基胍鎓阳离子以及氯离子、二氰胺、糖精、安赛蜜、乙酸根或硫氰酸根阴离子的组合。在 35 °C 时,每种碳水化合物的溶解度分别高达 43.9%、49.0%、17.1% 和 16.6%(每 100 克 IL 中碳水化合物克数)。还证明了通过疏水性离子液体从水相中提取碳水化合物的可能性。此外,还观察到两种碳水化合物的混合物具有一定的选择性。