Densities, isobaric expansivities and isothermal compressibilities of the thiocyanate-based ionic liquids at temperatures (298.15–338.15 K) and pressures up to 10 MPa

Densities of the following pure thiocyanate-based ionic liquids: 1-ethyl-3-methylimidazolium thiocyanate – [EMIM][SCN], 1-butyl-3-methylimidazolium thiocyanate – [BMIM][SCN] and 1-butyl-4-methylpyridinium thiocyanate – [B1M4Py][SCN] have been determined using a vibrating tube densimeter. Measurements have been done over the temperature range from T = 298.15–338.15 K and pressure p = 0.1–10 MPa. The experimental values of the densities have been correlated by means of the Tait equation with the temperature-dependent parameters. Isobaric expansivities and isothermal compressibilities have been calculated using the correlation equation.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Temperature and pressure-dependence of the density of ILs: [EMIM][SCN], [BMIM][SCN], [B1M4Py][SCN] have been determined. ► Tait equation was used to correlate experimental data. ► Isobaric expansivity, isothermal compressibility were calculated.