Organosolv process
9Chemical Pretreatment
Use organic solvents to break the internal ligninhemicellulose
bonds at high temperature (> 185 oC)
Organic solvents:
methanol, ethanol, acetone, ethylene glycol
oxalic and salicylic acids
@ low temperature, the organic solvents have to be used
together with inorganic acid such as H2SO4 and HCl.