Table 1 Technical comparisons of different methods for the dehydration of [C2C1Im][OAc]/H2O system
Entry | Item | IL:H2O (w/w) | t/P (h/kPa) | Final IL concentration (wt%) (°C) | IL loss (wt%) |
|---|---|---|---|---|---|
1 | PV | 20:80 | 4/~12 | >99 (@100) | 0.02–0.04 |
2a | ED | 10:90 | 4/− | 45 (@20) | 7.0 |
3 | VD | 20:80 | 4/10 | 90 (@100) | 0.1 |
4 | VD | 53:47 | 13.8 | 69 (@80) | 0.15 |
5b | PV | 53:47 | 13.8 | 69 (@80) | 0.03 |