Abstract: The chemical compositions of the branches of Salix psammophila and Caragana korshinskii Kom. were assessed. Degradation of mixture of these two-shrubs was carried out by non-sulfur alkaline hydrogen peroxide (HPA) process under optimized conditions (NaOH 18%, reaction temperature 165℃, charge of hydrogen peroxide 3%, time 90 min, liquid-solid ratio 4:1(mL:g)) selected according to the previous orthogonal experiment. Results indicated that lignin and hemicelluloses were significantly degraded by alkaline hydrogen peroxide with only small amount of associated lignin (4.39% phenolic composition) on cellulose. Cellulose had relatively high purity (glucose content 84.68%). Characterizations of cellulose preparation were studied by using FT-IR, GC, HPLC and ¹³CNMR techniques.

Key words: Salix psammophila, Caragana korshinskii Kom., alkaline hydrogen peroxide method, lignin, cellulose