无机盐水溶液对离子液体溶解度的影响

通过紫外分光光度法测定了不同温度下疏水性离子液体[C_nmim][PF_6](n=4,6,8)在水中的溶解度。并且考察了25℃下引入不同浓度的[CF_3COO]~-,和[ClO_4]~-离子对咪唑基团吸收峰的影响,测定了在不同浓度的[CF_3COO]~-,和[ClO_4]~-离子存在的水溶液中[C_nmim][PF_6](n=4,6,8)离子液体的溶解度,分析了不同浓度的共存离子[CF_3COO]~-,和[ClO_4]~-对[C_nmim][PF_6](n=4,6,8)离子液体的盐溶作用的影响,结果表明[CF_3COO]~-和[ClO_4]~-离子的存在对于疏水性离子液体在水中溶解度有增大的效果。     

四氟硼酸盐类离子液体对典型柴油的萃取脱硫研究

The extractive removal of sulfur compounds （S-compounds） from Dongying and Liaohe diesel fuels with [BF4]^--based ionic liquids were systematically investigated. The results show that the absorption capacity of an ionic liquid for the S-compounds in diesel fuels relies on its structure and its size. In the case of the two examined diesel fuels, both elongating the cation tail length and increasing the mass ratio of ionic liquid/diesel fuel promote the desulfurization ability of the examined ionic liquids. The results also show that imidazolium-based ionic liquids display higher extraction efficiencies than pyridinium-based ionic liquids, presumably owing to the fact that the rings of the S-compounds are similar to the imidazolium head ring. With the 1 ： 1 mass ratio of ionic liquid/diesel fuel, the rates of the first desulfurization of Dongying and Liaohe diesel fuels using [C8mim][BF4] amount to 29.96% and 39.76%, suggesting that [C8mim][BF4] is a promising extractant for desulfurization of these diesel fuels.