| abstract |
The invention discloses a method for converting lignin into liquid fuel through a one-step method. The method includes the following steps that complex solvent of raw lignin, a NaOH solution and low-carbon-alcohol solvent and a hydrogenation catalyst are added into a high-pressure reactor to be stirred at a constant speed for reacting for 3-7 hours at the temperature of 200-240 DEG C and the pressure of 4-7 MPa; a HCl solution is used for neutralizing and filtering after reacting, filter liquor is divided into a water phase and an oil phase after being added with ethyl acetate, then the ethyl acetate of the oil phase is subjected to rotary evaporation, and accordingly a lignin-degraded liquid product can be obtained. Lignin macromolecules undergo liquidation alcoholysis and hydrogenation reactions, the conversion rate of the raw lignin is 99%, the liquid product mainly includes cyclohexanol and a derivative of the cyclohexanol through GC-MS analysis, and the content is 81%. |