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Table 4 Mass recovery and lignin content of solids recovered from the liquid fraction after treatment with three ILs

From: Sugarcane bagasse pretreatment using three imidazolium-based ionic liquids; mass balances and enzyme kinetics

  mg % mass mg (% starting mass of lignin)  
Sample Recovered mass Lignin content Lignin recovery pH
[C4mim]Cl SF2 1.2 31 0.4 (0.3) 6.1
[C4mim]Cl SF3 0.3 n/d n/d 1.0
[C4mim]Cl TOTAL 1.5   0.4 (0.3)  
[C2mim]Cl SF2 10.8 30 3.2 (1.5) 3.6
[C2mim]Cl SF3 0.3 n/d n/d 0.3
[C2mim]Cl TOTAL 11.1   3.2 (1.5)  
[C2mim]OAc SF2 58.2 23 13.4 (9.9) 7.0
[C2mim]OAc SF3 12.2 26 3.2 (1.7) 1.0
[C2mim])OAc TOTAL 70.4   16.6 (11.7)  
  1. Masses expressed on dry basis.