Table 4. Yield of Lignin Extracted by Ionic Liquids at Various Experimental Temperatures.
102 yielda (%) |
||||
---|---|---|---|---|
T (°C) | [DIPEA][Ac] | [DIPEA][P] | [DIPEA][O] | [DIPEA][B] |
120 | 71.2 | 63.7 | 54.2 | 46.2 |
100 | 49.7 | 44.1 | 30.5 | ND |
80 | 24.3 | 21.9 | 18.3 | ND |
Yield = mass percentage of the extracted lignin from coffee husk/28.4%.