Table 5. Intrinsic Viscosity [η] and MW of the Extracted Lignin Fractions Obtained after Acacia Wood Fractionation with Different DESs (160 °C for 4 h)^a.

	ChCl:LA (1:2)	ChCl:LA (1:3)	kraft lignin
[η] (mL/g)	32.17 (±0.68)	30.80 (±0.68)	46.40 (±3.11)
correlation	0.93 (±0.03)	0.82 (±0.02)	0.90 (±0.13)
lignin MW (g/mol)	9600 (±0.08)	9440 (±0.08)	11100 (±0.28)

^aCommercial kraft lignin is added for comparison.