Physical Characterization of an Aromatic Extraction Solvent Formed by [bpy][BF4] and [4bmpy][Tf2N] Mixed Ionic Liquids

详细信息    查看全文

• 作者：Marcos Larriba ; Silvia Garc铆a ; Pablo Navarro ; Juli谩n Garc铆a ; Francisco Rodr铆guez
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2013
• 出版时间：June 13, 2013
• 年：2013
• 卷：58
• 期：6
• 页码：1496-1504
• 全文大小：354K
• 年卷期：v.58,no.6(June 13, 2013)
• ISSN：1520-5134

文摘

The binary mixture of N-butylpyridinium tetrafluoroborate ([bpy][BF₄]) and 4-methyl-N-butylpyridinium bis(trifluoromethylsulfonyl)imide ([4bmpy][Tf₂N]) ionic liquids (ILs) has recently been proposed as an environmentally friendly solvent in the liquid鈥搇iquid extraction of toluene from heptane. In addition to the extractive properties, a solvent must possess adequate physical properties to be used in an industrial process. In this paper, we have measured refractive indices, densities, and dynamic viscosities of {[bpy][BF₄] + [4bmpy][Tf₂N]} IL mixtures over the whole range of compositions at temperatures from 293.15 K to 353.15 K. A comparative analysis between physical properties of binary IL mixtures and those of sulfolane has been made. The accuracy of the group contribution method proposed by Ye and Shreeve in predicting experimental densities of a binary pyridinium-based IL mixture composed of four different ions has been evaluated. The Bingham and the Grunberg鈥揘issan mixing rules have also been used to estimate the viscosities of the binary IL mixtures.