Uniqueness of biphasic organosolv treatment of soft- and hardwood using water/1-butanol co-solvent

Biphasic organosolv treatment for soft- and hardwood using water/1-butanol was unique based on the correlation between liquid-phase states solubility of co-solvents when compared with a monophasic water/ethanol system. First, Pro II process simulator showed that exhibited biphasic system in range 1.6–19.0 mol/mol at temperature 473 K. In addition, evaluated Hildebrand parameter (?), which indicated could simultaneously provide 28.5 42.0 MPa1/2 1-butanol water phase, respectively. Each ? value appeared appropriate lignin hemicellulose dissolution because they were similar to those reported typical sugar. While be removed by increasing content an Japanese cedar sawdust, high removal achieved only under conditions. Carbon yield each fraction (solid, 1-butanol-, water-soluble fraction) Py-GC/MS analysis revealed recovered fractions, The willow results water/ethanol. co-solvent not efficiently remove did produce level needed same contrast, greater also applicable separation industrial agricultural waste; sugarcane bagasse. Finally, 2D-NMR spectra 1-butanol-soluble trace amount ?-O-4 linkages lignin, indicating cleaved via hydrolysis phase during treatment.