Thermodynamic modelling of liquid-liquid extraction of naphthenic acid from dodecane using imidazolium based phenolate ionic liquids

• Main Authors: Shah, S.N., Mutalib, M.I.A., Ismail, M.F., Suleman, H., Lethesh, K.C., Pilus, R.B.M.
• Format: Article
• Published: Elsevier B.V. 2016
• Online Access: http://scholars.utp.edu.my/id/eprint/30845/; https://www.scopus.com/inward/record.uri?eid=2-s2.0-84964343838&doi=10.1016%2fj.molliq.2016.03.053&partnerID=40&md5=edbee8d6b789096e3fd8793b87d9b446

In this work, N-alkyl imidazolium based ionic liquids with phenolate anions have been used for the separation of naphthenic acid from model oil. The liquid-liquid equilibrium (LLE) data for the ternary mixture of CnmimPhe, dodecane and naphthenic acid were experimentally obtained at a constant temperature of 303.15 K and atmospheric pressure. The effect of chain length on the extraction capability was observed by calculating the distribution coefficient. The experimental tie line data was correlated using the non-random two liquid model (NRTL) and Universal Quasi Chemical (UNIQUAC) model and new interaction parameters for the ternary systems are reported. The experimental data provides a good correlation with the modelling data and a very low root mean square deviation (RMSD) value was observed for all the systems. © 2016 Elsevier B.V. All rights reserved.