TY - JOUR
T1 - Solute recovery from ionic liquids : a conceptual design study for recovery of styrene monomer from [4-mebupy][BF4]
AU - Jongmans, M.T.G.
AU - Trampé, J.
AU - Schuur, B.
AU - Haan, de, A.B.
PY - 2013
Y1 - 2013
N2 - Extractive distillation using ionic liquids (ILs) is a promising technology to separate the close-boiling mixture ethylbenzene/styrene. A proper solvent regeneration is crucial to obtain a technical and economic feasible process. In this work, several regeneration technologies were studied to recover styrene from the IL [4-mebupy][BF4] using Aspen Plus. Stripping with a hot gas (N2 or ethylbenzene), supercritical CO2 extraction, distillation by adding a co-solvent, and evaporation were investigated. It was found that the IL that was fed as solvent to the extractive distillation column should have a purity of at least 99.6 wt% to maintain the purities of the top and bottom products from the extractive distillation column. This purity could not be obtained with an evaporator using mild conditions (T = 130 °C, Tcondenser = 20 °C). From the process models and the economic evaluation for a typical production capacity of 500,000 mta, the conclusion can be drawn that evaporation using very low pressures (P <10 mbar) and stripping with ethylbenzene are the most promising technologies to recover styrene monomer from the IL [4-mebupy][BF4].
AB - Extractive distillation using ionic liquids (ILs) is a promising technology to separate the close-boiling mixture ethylbenzene/styrene. A proper solvent regeneration is crucial to obtain a technical and economic feasible process. In this work, several regeneration technologies were studied to recover styrene from the IL [4-mebupy][BF4] using Aspen Plus. Stripping with a hot gas (N2 or ethylbenzene), supercritical CO2 extraction, distillation by adding a co-solvent, and evaporation were investigated. It was found that the IL that was fed as solvent to the extractive distillation column should have a purity of at least 99.6 wt% to maintain the purities of the top and bottom products from the extractive distillation column. This purity could not be obtained with an evaporator using mild conditions (T = 130 °C, Tcondenser = 20 °C). From the process models and the economic evaluation for a typical production capacity of 500,000 mta, the conclusion can be drawn that evaporation using very low pressures (P <10 mbar) and stripping with ethylbenzene are the most promising technologies to recover styrene monomer from the IL [4-mebupy][BF4].
U2 - 10.1016/j.cep.2013.04.007
DO - 10.1016/j.cep.2013.04.007
M3 - Article
SN - 0255-2701
VL - 70
SP - 148
EP - 161
JO - Chemical Engineering and Processing : Process Intensification
JF - Chemical Engineering and Processing : Process Intensification
ER -