1. Chauvel A, Lefebvre G. Petrochemical Processes. Paris: Editions Technip; 1989.
2. Universal Oil Prod Co (UNVO-C). Aromatic hydrocarbons spen- from mixts with non-aromatics by solvent extraction and extractive distillation. U.S. Patent FR2141889-A, August 01, 1977.
3. Extractive distillation: A review;Lei;Sep. Purif. Technol.,2003
4. Berg L. Separation of benzene from nonaromatic hydrocarbons by extractive distillation. U.S. Patent 4514262, April 30, 1985.
5. Wang ZR, Xia SQ, Ma PS. (Liquid + liquid) equilibria for the ternary system of (N-formylmorpholine + ethylbenzene + 2,2,4-trimethylpentane) at temperatures (303.15, 313.15, and 323.15) K. Fluid Phase Equilibria 2012; 328: 25-30. .