摘要
Abstract
At 101.32 kPa, isobaric vapor-liquid equilibrium data for the ethanol-water and acetic acid-water system containing ionic liquid (IL) triethylammonium hydrogen sulfate ( [N2,2,2,H] HSO4) were measured in an Ellis still. The vapor-liquid equilibrium curve of the ethanol-water system began to deviate from the line when the mole fraction of [N2,2,2,h]HSO4 reached 5%. When the mole fraction of [N2,2,2,h]HSO4 was 10% or 20% , the deviation from the line increased. The salt effect of IL changed the relative volatility of water and ethanol > and even led to the disappearance of azeotropic point. The more IL was added to the system, the more obvious was the salt effect. The relative volatility of ethanol to water increased with the increase of IL. Compared with other ionic liquids, low-cost and high efficiency were advantages of the [N2,2,2,h] HSO4. It was concluded that [N2,2,2,h ] HSO4 could be used as an entrainer for extractive distillation of the ethanol-water system. The measured ternary data were correlated using the NRTL model and the correlated result was in agreement with the experiment data.关键词
离子液体/汽液平衡/三乙基铵硫酸氢盐/乙醇/水Key words
ionic liquid/ vapor-liquid equilibrium/ triethylammonium hydrogen sulfate/ ethanol/ water分类
化学化工
