Table 2.

Solubility of lignin in ILs and IL-based solvent systems.

Solvent	Dissolution Conditions	Time	Lignin (%)	Cellulose (%)	Xylan (%)	Reference
[Py][For]	75 °C	1 h	70	<1		[48]
[Py][Pro]	75 °C	1 h	55			[48]
[Py][Ac]	75 °C	1 h	64			[48]
[Mmim][MeSO4]	80 °C	24 h	50			[49]
[Bmim][CF3SO3]	80 °C	24 h	50			[49]
[Py][Ac]	90 °C	24 h	>50	0.12 ± 0.03	0.82 ± 0.00	[34]
[Mim][Ac]	90 °C	24 h	>50	0.20 ± 0.05	5.60 ± 0.77	[34]
[Pyrr][Ac]	90 °C	24 h	>50	0.79 ± 0.04	>15	[34]
GVL/[Bmim]Ac	30 °C		20.9			[53]
GVL/[Bmim]Ac	60 °C		28.0			[53]
GVL/[Amim]Cl	30 °C		13.4			[53]
GVL/[Amim]Cl	60 °C		26.6			[53]
[Emim]Ac/water (wt:wt 70:30)	60 °C		45			[54]