Deep Eutectic Solvents for the Separation of Toluene/1-Hexene via Liquid–Liquid Extraction
The separation of aromatic/olefin mixtures is a difficult task in the petrochemical industry, since the boiling points of these hydrocarbons are very similar. This work aims to use deep eutectic solvents (DESs) for the extraction of toluene from 1-hexene by liquid–liquid extraction. A total of 53 DE...
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MDPI AG
2022-11-01
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| Series: | Separations |
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| Online Access: | https://www.mdpi.com/2297-8739/9/11/369 |
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| author | Mohamed K. Hadj-Kali Lahssen El Blidi Sarwono Mulyono Irfan Wazeer Emad Ali Jagan Rallapalli |
| author_facet | Mohamed K. Hadj-Kali Lahssen El Blidi Sarwono Mulyono Irfan Wazeer Emad Ali Jagan Rallapalli |
| author_sort | Mohamed K. Hadj-Kali |
| collection | DOAJ |
| description | The separation of aromatic/olefin mixtures is a difficult task in the petrochemical industry, since the boiling points of these hydrocarbons are very similar. This work aims to use deep eutectic solvents (DESs) for the extraction of toluene from 1-hexene by liquid–liquid extraction. A total of 53 DESs were studied qualitatively and quantitatively using the COSMO-RS approach to separate the binary mixture of toluene and 1-hexene. The selectivity, capacity, and performance index of all DESs were evaluated by calculating the activity coefficient at infinite dilution. The σ-profile and σ-potential of each component were interpreted to evaluate the interactions between the different species. We then selected three DESs for experimental validation, namely benzyltriphenylphosphonium chloride:triethylene glycol BzTPPCl:TEG (1:8), tetrabutylammonium bromide:triethylene glycol TBABr:TEG (1:3), and tetrabutylammonium bromide:ethylene glycol TBABr: EG (1:4). Experimental liquid–liquid equilibrium data were obtained for the ternary mixtures {1-hexene (1) + toluene (2) + DES (3)} at T = 298.15 K and atmospheric pressure. Based on the selectivity data and the solute distribution ratio, the feasibility of different DESs as extractive solvents was tested. Finally, <sup>1</sup>H NMR was performed to elucidate the extraction mechanism. No DES was found in the raffinate phase, indicating minimal cross-contamination. |
| first_indexed | 2024-03-09T18:00:26Z |
| format | Article |
| id | doaj.art-cdbc116ca7424230b69d2be0c29e230a |
| institution | Directory Open Access Journal |
| issn | 2297-8739 |
| language | English |
| last_indexed | 2024-03-09T18:00:26Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Separations |
| spelling | doaj.art-cdbc116ca7424230b69d2be0c29e230a2023-11-24T09:59:40ZengMDPI AGSeparations2297-87392022-11-0191136910.3390/separations9110369Deep Eutectic Solvents for the Separation of Toluene/1-Hexene via Liquid–Liquid ExtractionMohamed K. Hadj-Kali0Lahssen El Blidi1Sarwono Mulyono2Irfan Wazeer3Emad Ali4Jagan Rallapalli5Chemical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi ArabiaChemical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi ArabiaChemical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi ArabiaChemical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi ArabiaChemical Engineering Department, College of Engineering, King Saud University, Riyadh 11421, Saudi ArabiaFunctional Chemicals, Sabic Technology Centre, Riyadh 14334, Saudi ArabiaThe separation of aromatic/olefin mixtures is a difficult task in the petrochemical industry, since the boiling points of these hydrocarbons are very similar. This work aims to use deep eutectic solvents (DESs) for the extraction of toluene from 1-hexene by liquid–liquid extraction. A total of 53 DESs were studied qualitatively and quantitatively using the COSMO-RS approach to separate the binary mixture of toluene and 1-hexene. The selectivity, capacity, and performance index of all DESs were evaluated by calculating the activity coefficient at infinite dilution. The σ-profile and σ-potential of each component were interpreted to evaluate the interactions between the different species. We then selected three DESs for experimental validation, namely benzyltriphenylphosphonium chloride:triethylene glycol BzTPPCl:TEG (1:8), tetrabutylammonium bromide:triethylene glycol TBABr:TEG (1:3), and tetrabutylammonium bromide:ethylene glycol TBABr: EG (1:4). Experimental liquid–liquid equilibrium data were obtained for the ternary mixtures {1-hexene (1) + toluene (2) + DES (3)} at T = 298.15 K and atmospheric pressure. Based on the selectivity data and the solute distribution ratio, the feasibility of different DESs as extractive solvents was tested. Finally, <sup>1</sup>H NMR was performed to elucidate the extraction mechanism. No DES was found in the raffinate phase, indicating minimal cross-contamination.https://www.mdpi.com/2297-8739/9/11/369liquid–liquid extractiondeep eutectic solventsCOSMO-RS |
| spellingShingle | Mohamed K. Hadj-Kali Lahssen El Blidi Sarwono Mulyono Irfan Wazeer Emad Ali Jagan Rallapalli Deep Eutectic Solvents for the Separation of Toluene/1-Hexene via Liquid–Liquid Extraction Separations liquid–liquid extraction deep eutectic solvents COSMO-RS |
| title | Deep Eutectic Solvents for the Separation of Toluene/1-Hexene via Liquid–Liquid Extraction |
| title_full | Deep Eutectic Solvents for the Separation of Toluene/1-Hexene via Liquid–Liquid Extraction |
| title_fullStr | Deep Eutectic Solvents for the Separation of Toluene/1-Hexene via Liquid–Liquid Extraction |
| title_full_unstemmed | Deep Eutectic Solvents for the Separation of Toluene/1-Hexene via Liquid–Liquid Extraction |
| title_short | Deep Eutectic Solvents for the Separation of Toluene/1-Hexene via Liquid–Liquid Extraction |
| title_sort | deep eutectic solvents for the separation of toluene 1 hexene via liquid liquid extraction |
| topic | liquid–liquid extraction deep eutectic solvents COSMO-RS |
| url | https://www.mdpi.com/2297-8739/9/11/369 |
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