Research Article
Consecutively Preparing D-Xylose, Organosolv Lignin, and Amorphous Ultrafine Silica from Rice Husk
Table 5
Contents of metal oxide in silica obtained from the rice husk and residue 2 under the optimum conditions of ethanediol pulping.
| Metal oxide (wt.%) | K2O | Na2O | CaO | MgO | Al2O3 | Fe2O3 | CuO | MnO2 | ZnO | Sum |
| From RH | 0.9808 | 0.3689 | 7.9216 | 1.7877 | 0.4530 | 0.3158 | 0.0047 | 0.1121 | 0.1145 | 12.0616 | From residue 2 | 0.0113 | 0.0145 | 0.0235 | 0.0011 | 0.0124 | 0.0035 | 0.0017 | 0.0000 | 0.0036 | 0.0716 |
|
|