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Recovery of the N,N-Dibutylimidazolium Chloride Ionic Liquid from Aqueous Solutions by Electrodialysis Method
| Content Provider | MDPI |
|---|---|
| Author | Anna, Mielańczyk Babilas, Dorota Kowalik-Klimczak, Anna |
| Copyright Year | 2022 |
| Description | Ionic liquids (ILs), named also as liquid salts, are compounds that have unique properties and molecular architecture. ILs are used in various industries; however, due to their toxicity, the ILs’ recovery from the postreaction solutions is also a very important issue. In this paper, the possibility of 1,3-dialkylimidazolium IL, especially the N,N-dibutylimidazolium chloride $([C_{4}C_{4}$IM]Cl) recovery by using the electrodialysis (ED) method was investigated. The influence of $[C_{4}C_{4}$IM]Cl concentration in diluate solution on the ED efficiency was determined. Moreover, the influence of IL on the ion-exchange membranes’ morphology was examined. The recovery of $[C_{4}C_{4}$IM]Cl, the $[C_{4}C_{4}$IM]Cl flux across membranes, the $[C_{4}C_{4}$IM]Cl concentration degree, the energy consumption, and the current efficiency were determined. The results showed that the ED allows for the $[C_{4}C_{4}$IM]Cl recovery and concentration from dilute solutions. It was found that the $[C_{4}C_{4}$IM]Cl content in the concentrates after ED was above three times higher than in the initial diluate solutions. It was noted that the ED of solutions containing 5–20 g/L $[C_{4}C_{4}$IM]Cl allows for ILs recovery in the range of 73.77–92.45% with current efficiency from 68.66% to 92.99%. The $[C_{4}C_{4}$IM]Cl recovery depended upon the initial $[C_{4}C_{4}$IM]Cl concentration in the working solution. The highest $[C_{4}C_{4}$IM]Cl recovery (92.45%) and ED efficiency (92.99%) were obtained when the $[C_{4}C_{4}$IM]Cl content in the diluate solution was equal 20 g/L. Presented results proved that ED can be an interesting and effective method for the $[C_{4}C_{4}$IM]Cl recovery from the dilute aqueous solutions. |
| Starting Page | 6472 |
| e-ISSN | 14220067 |
| DOI | 10.3390/ijms23126472 |
| Journal | International Journal of Molecular Sciences |
| Issue Number | 12 |
| Volume Number | 23 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-06-09 |
| Access Restriction | Open |
| Subject Keyword | International Journal of Molecular Sciences Applied Chemistry Electrodialysis Ionic Liquids Recovery 1,3-dialkylimidazolium Ionic Liquids N,n-dibutylimidazolium Chloride |
| Content Type | Text |
| Resource Type | Article |
