Analysis of Microwave-Assisted Heating and Water Extraction from Imidazolium and Phosphonium Based Ionic Liquids

29 Pages Posted: 23 Mar 2022

See all articles by Rene Cabezas

Rene Cabezas

affiliation not provided to SSRN

Claudio Araya-López

affiliation not provided to SSRN

Pedro Carrera

affiliation not provided to SSRN

Alejandra Torres

affiliation not provided to SSRN

Luis Pino

affiliation not provided to SSRN

Esteban Quijada-Maldonado

affiliation not provided to SSRN

Gastón Merlet

affiliation not provided to SSRN

Julio Romero

affiliation not provided to SSRN

Andrea Plaza

affiliation not provided to SSRN

Abstract

Ionic liquids have attracted much attention with their low melting point, low vapor pressure, and non-flammability. However, their application in industrial processes is not common due to the high economic cost and low efficiency of recovering ILs. To reduce costs and environmental effects, this study proposes to use industrial microwave irradiation to recover eight different water/ILs. The heating kinetics and identification between dielectric and convective heat properties were studied. Imidazolium-based ionic liquids demonstrated higher temperatures in short time periods (1-butyl-3-methylimidazolium methylsulfate ([bmim][CH3OSO3]) at 417 K in 150 s) than Phosphonium-based LIs (bis(trifluoromethylsulfonyl) trihexyl(tetradecyl) phosphonium imide ([P6,6,6,14][Tf2N]) at 398 K in 360 s). Microwave-assisted heating water extraction experiments (water/ionic liquids) demonstrated 90% recovery in ~200 s for 1-octyl-3-methylimidazolium chloride ([omim][Cl]). Finally, microwave irradiation demonstrated a 15 times shorter time reduction than vacuum-assisted distillation (~90% recovery). Therefore, microwave-assisted heating has shown to be an excellent form to heat ionic liquids to decrease the cost of the extraction process.

Keywords: ionic liquid, microwave heating, Heat Capacity, Water extraction

Suggested Citation

Cabezas, Rene and Araya-López, Claudio and Carrera, Pedro and Torres, Alejandra and Pino, Luis and Quijada-Maldonado, Esteban and Merlet, Gastón and Romero, Julio and Plaza, Andrea, Analysis of Microwave-Assisted Heating and Water Extraction from Imidazolium and Phosphonium Based Ionic Liquids. Available at SSRN: https://ssrn.com/abstract=4052757 or http://dx.doi.org/10.2139/ssrn.4052757

Rene Cabezas (Contact Author)

affiliation not provided to SSRN ( email )

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Claudio Araya-López

affiliation not provided to SSRN ( email )

No Address Available

Pedro Carrera

affiliation not provided to SSRN ( email )

No Address Available

Alejandra Torres

affiliation not provided to SSRN ( email )

No Address Available

Luis Pino

affiliation not provided to SSRN ( email )

No Address Available

Esteban Quijada-Maldonado

affiliation not provided to SSRN ( email )

No Address Available

Gastón Merlet

affiliation not provided to SSRN ( email )

No Address Available

Julio Romero

affiliation not provided to SSRN ( email )

No Address Available

Andrea Plaza

affiliation not provided to SSRN ( email )

No Address Available

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