Past and Present Research Systems of Green Chemistry

Biography

Biography: Vinod Kumar

Abstract

Large quantities of liquids or their mixtures are used as solvents for numerous processes in chemical and related industries; thus the challenge of non-harmful solvents, because of new environmental regulations, has promoted great developments of innovative products like ionic liquids to protect the environment. Over the last decades liquids or their mixtures have been characterized on the basis of their thermodynamic properties. Consequently, the need for a deep knowledge of thermodynamic properties of liquid mixtures has appeared driven both by technological and social demands. Now a day, the interest for industrial multi-component processes is increasing and thus, thermodynamic studies of ionic liquid mixtures are being developed in parallel to industrial advances, contributing to design, improvement and output of the processes. In view of this, we report densities and speeds of sound data of 1-ethyl-3-methylimidazolium tetrafluoroborate (1) + water (2) + formamide or N,N- dimethylformamide (3) ternary mixtures over entire composition range at 293.15, 298.15, 303.15, 308.15 K. The heat capacities, Cp of 1-ethyl-3-methylimidazolium tetrafluoroborate, water, formamide and N,N- dimethylformamide have also been measured at 293.15, 298.15, 303.15, 308.15 K using micro differential scanning calorimeter. The measured data have been utilized to determine excess molar volumes and excess isentropic compressibilities values. The topology of the constituent molecules (Graph theory) has been utilized to determine excess molar volumes and excess isentropic compressibilities values. Results obtained indicate that experimental and calculated values are in good agreement.