Extraction process design for the separation of aromatic and aliphatic hydrocarbons using organic solvent, ionic liquid or their mixture: a comparative study
The goal of the present work is focused on the design of a liquid–liquid extraction process using organic solvent, ion liquids (IL), as well as their mixture. For this purpose, the sulfolane/[bmim][SCN] system was investigated. Benzene–heptane binary mixture has been selected as a case study representing aromatic and aliphatic hydrocarbon families, respectively. A comparative study among three proposed extraction processes employing the traditional organic solvent sulfolane, [bmim][SCN] and the system of sulfolane/[bmim][SCN] has been provided to determine the optimal process for benzene extraction. For feed containing less than 50 wt% of benzene, it was recommended to use a mixed solvent containing 60 wt% of [bmim][SCN].
KeywordsIonic liquid Aromatic hydrocarbon UNIQUAC model Liquid–liquid extraction
We acknowledge the financial support provided by the National Natural Science Foundation of China (nos. 21878028, 21606026); the Fundamental Research Funds for the Central Universities (nos. 106112017CDJQJ228809, 2018CDYJSY0055); the Chongqing Research Program of Basic Research and Frontier Technology (no. CSTC2016JCYJA0474); and Hundred Talents Program at Chongqing University. Helpful comments and suggestions from the reviewers and editor are also gratefully acknowledged.
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