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      Density, Viscosity and Surface Tension of Binary Mixtures of 1-Butyl-1-Methylpyrrolidinium Tricyanomethanide with Benzothiophene

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          Abstract

          The effects of temperature and composition on the density and viscosity of pure benzothiophene and ionic liquid (IL), and those of the binary mixtures containing the IL 1-butyl-1-methylpyrrolidynium tricyanomethanide ([BMPYR][TCM] + benzothiophene), are reported at six temperatures (308.15, 318.15, 328.15, 338.15, 348.15 and 358.15) K and ambient pressure. The temperature dependences of the density and viscosity were represented by an empirical second-order polynomial and by the Vogel–Fucher–Tammann equation, respectively. The density and viscosity variations with compositions were described by polynomials. Excess molar volumes and viscosity deviations were calculated and correlated by Redlich–Kister polynomial expansions. The surface tensions of benzothiophene, pure IL and binary mixtures of ([BMPYR][TCM] + benzothiophene) were measured at atmospheric pressure at four temperatures (308.15, 318.15, 328.15 and 338.15) K. The surface tension deviations were calculated and correlated by a Redlich–Kister polynomial expansion. The temperature dependence of the interfacial tension was used to evaluate the surface entropy, the surface enthalpy, the critical temperature, the surface energy and the parachor for pure IL. These measurements have been provided to complete information of the influence of temperature and composition on physicochemical properties for the selected IL, which was chosen as a possible new entrainer in the separation of sulfur compounds from fuels. A qualitative analysis on these quantities in terms of molecular interactions is reported. The obtained results indicate that IL interactions with benzothiophene are strongly dependent on packing effects and hydrogen bonding of this IL with the polar solvent.

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          The online version of this article (doi:10.1007/s10953-014-0257-1) contains supplementary material, which is available to authorized users.

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          ANALYSIS OF RECENT MEASUREMENTS OF THE VISCOSITY OF GLASSES

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            Die Abhängigkeit der Viscosität von der Temperatur bie unterkühlten Flüssigkeiten

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              The Principle of Corresponding States

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                Author and article information

                Contributors
                ula@ch.pw.edu.pl
                Journal
                J Solution Chem
                J Solution Chem
                Journal of Solution Chemistry
                Springer US (Boston )
                0095-9782
                1572-8927
                14 November 2014
                14 November 2014
                2014
                : 43
                : 11
                : 1929-1946
                Affiliations
                [ ]Department of Physical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
                [ ]Thermodynamic Research Unit, School of Chemical Engineering, University of KwaZulu-Natal, Howard College Campus, King George V Avenue, Durban, 4001 South Africa
                Article
                257
                10.1007/s10953-014-0257-1
                4249917
                25484473
                4661f272-e9b1-4111-a234-3fa9c8386a2d
                © The Author(s) 2014

                Open AccessThis article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

                History
                : 28 April 2014
                : 21 June 2014
                Categories
                Article
                Custom metadata
                © Springer Science+Business Media New York 2014

                Analytical chemistry
                ([bmpyr][tcm] + benzothiophene),experimental density,dynamic viscosity,surface tension,molecular interactions,thermodynamics

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