Abstract—N-methyl 2-pyrrolidone (NMP) is applied as a solvent in 1,3-butadiene (BD) extraction plants. The solvent, which is circulated through the unit, is regenerated in a solvent recovery unit. The wastes of solvent recovery unit contains at least 50 wt% NMP which is generally disposed. The recovery of NMP from this waste for reusing in the BD purification plant was studied in the present research by experimental methods such as dissolution, coagulation, and distillation. A purified NMP with the concentration of 99 wt% could be obtained. In addition, the process was scaled up for manufacturing and installing in the BD extraction plant.
Index Terms—NMP, solvent recovery, BD extraction plant, dissolution, coagulation, distillation.
H. R. Mortaheb, F. Meshkini, F. Ghaemmaghami, and K. Tabar Heidar are with the Chemistry & Chemical Engineering Research Center of Iran, Tehran, Iran (e-mail: mortaheb@ccerci.ac.ir, meshkini@ccerci.ac.ir, ghaemmaghami@ccerci.ac.ir, ktabarh@ccerci.ac.ir).
A. Bolhasani is with the Research and Development, Jam Petrochemical Co., Assaluyeh, Boushehr, Iran (e-mail: a_bolhasani@jpcomplex.com).
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Cite: H. R. Mortaheb, A. Bolhasani, F. Meshkini, F. Ghaemmaghami, and K. Tabar Heidar, "A Method for Recovery of N-methyl 2-pyrrolidone from Wastes of Solvent Regeneration Unit in 1,3-Butadiene Extraction Plant," International Journal of Chemical Engineering and Applications vol. 7, no. 5, pp. 299-302, 2016.
