Title: Extraction of phenols from coal tar oil using binary solvents and ionic liquid mixture

Authors: Subhash Kalidindi; S. Abhishek Vinayak; Shoumitra Biswas; Duraisamy Kumaresan; R. Krishna Prasad

Addresses: Department of Chemical Engineering and Materials Science, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, India ' Department of Chemical Engineering and Materials Science, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, India ' Department of Chemical Engineering and Materials Science, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, India ' Department of Chemical Engineering and Materials Science, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, India ' Department of Chemical Engineering and Materials Science, Amrita School of Engineering, Coimbatore, Amrita Vishwa Vidyapeetham, India

Abstract: The extraction of phenols from coal tar oils using acetonitrile solutions of ionic liquids (ILs) through a new extraction method is studied. The IL containing acetonitrile solution formed a clear immiscible layer with hexane containing coal tar oil, which facilitated superior extractions of phenol and p-cresol with high distribution coefficient values. The IL with lower carbon chain length (three carbons) showed extraction efficiency greater than 96% for phenol and p-cresol extractions from coal tar oil. The process models for extraction of phenol and p-cresol from coal tar oil were studied to comprehend the interactions of various factors. [Received: December 23, 2017; Accepted: March 7, 2018]

Keywords: acetonitrile-hexane mixture; coal tar; ionic liquids; phenols extraction.

DOI: 10.1504/IJOGCT.2020.105454

International Journal of Oil, Gas and Coal Technology, 2020 Vol.23 No.2, pp.240 - 260

Received: 23 Dec 2017
Accepted: 07 Mar 2018

Published online: 02 Mar 2020 *

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