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Solute Recovery from Ionic Liquids: a Conceptual Design Study for Recovery of Styrene Monomer from [4-Mebupy][Bf4]

Solute Recovery from Ionic Liquids: a Conceptual Design Study for Recovery of Styrene Monomer from [4-Mebupy][Bf4], Mark T. G. Jongmans, Jorg Trampe, Boelo Schuur, and Andre B. de Haan. Chemical Engineering and Processing 2013, 70 , 148–161.

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Abstract

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 (N-2 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 degrees C, T-condenser >= 20 degrees 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]. (C) 2013 Elsevier B.V. All rights reserved.

BibTeX

@article{ ISI:000323994300018,
Author = {Jongmans, Mark T. G. and Trampe, Jorg and Schuur, Boelo and de Haan, Andre B.},
Title = {Solute Recovery from Ionic Liquids: a Conceptual Design Study for Recovery of Styrene Monomer from {[}4-Mebupy]{[}Bf4]},
Journal = {Chemical Engineering and Processing},
Year = {2013},
Volume = {70},
Pages = {148-161},
Month = {},
Abstract = {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 (N-2 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 degrees C, T-condenser >= 20 degrees 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]. (C) 2013 Elsevier B.V. All rights reserved.},
DOI = {10.1016/j.cep.2013.04.007},
ISSN = {0255-2701},
Unique-ID = {ISI:000323994300018},
}

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