Reaction Characteristics of Organosolv-Fractionation Process for Selective Extraction of Carbohydrates and Lignin from Rice Husks

The organosolv-fractionation process can act as a biorefinery because it separate the main components of biomass, such lignin and hemicellulose, with high purity. ethanol-based was applied to carbohydrates from rice husks, extraction behavior observed according various reaction variables. Various conditions different temperatures (150 °C, 170 190 °C), times (30 min, 60 120 min), ethanol concentrations (40%, 60%, 80%) were tested while maintaining solid:liquid ratio (1:10) sulfuric acid concentration (0.25 wt.%). Two optimal for target chosen: sugar recovery, 150 40% used condition 1, 80% 2. Under 91.5% glucan preserved in residual solid, 75.0% xylan extracted liquid hydrolysate. For 2, 59.9% recovered. To properly choose apply correct fractionation method conditions, (such carbohydrate retention extraction), solubilization, precipitation should be carefully considered.