Spruce wood meal heating with water

Delignification of Spruce Wood Meal on Heating with Water... 

Figure 2. Delignification on heating spruce wood meal with water at 150°C.

To test the assumption that the delignification taking place when spruce wood meal is heated with water is a result of acid catalyzed hydrolysis, wood meal samples were heated with 0.5 M phosphate buffer solution at pH 6.8 (Fig. 4). 

Figure 3. Lignins dissolved and furfural formed on heating spruce wood meal with water for 6 h at 150°C. Column Sephadex G-50. Eluent 0.5 M NaOH.

Figure 10. Lignins dissolved on heating spruce wood meal with dioxane-phosphate buffer (60 40% v/v) for 16 h at 150°C (A) Lignins dissolved (B) Water-insoluble lignin. Column Spherisorb ODS. Elution Gradient elution with phosphate buffer-methanol.

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