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Table 1 Chemical compositions of the control, ILs-pretreated, and alkali post-treated substrates obtained after the synergistic treatment

From: Evaluation of the two-step treatment with ionic liquids and alkali for enhancing enzymatic hydrolysis of Eucalyptus: chemical and anatomical changes

Samplesa Glucan (%) Xylan (%) AIL (%) ASL (%) Lignin (%) Solid recovery (%)
C R C R C R
Control 41.58   15.85   25.44 3.96 29.40   100
BCl 42.32 0.57 15.87 2.18 23.77 4.07 27.84 7.50 97.69
BAc 43.94 1.05 14.84 12.33 21.81 4.26 26.07 16.97 93.64
Control-4 46.99 10.49 12.17 39.18 25.20 3.88 29.08 21.65 79.21
BCl-4 47.94 11.32 12.24 40.60 24.02 3.66 27.68 27.58 76.92
BAc-4 48.90 11.99 11.94 43.63 23.09 3.81 26.90 31.53 74.83
  1. aControl: raw material; BCl and BAc: samples obtained after the pretreatment with [Bmim]Cl and [Bmim]OAc at 120 °C for 30 min, respectively; Control-4, BCl-4, and BAc-4: residues obtained after the successive treatment with 0.5, 2.0, and 4.0 % NaOH at 90 °C for 2 h from the untreated, [Bmim]Cl-pretreated, and [Bmim]OAc-pretreated Eucalyptus, respectively
  2. AIL acid insoluble lignin, ASL acid soluble lignin, C the content of each composition, R the removal of each composition after treatment on the basis of its original amount in the raw material