A method for recovering low-boiling alcohol component pulping liquor Method

The present invention relates to a process for recovering low-boiling solvent pulping liquor component method involves engineering and plant fiber pulp refined papermaking art biomass resources. A method of low-boiling alcohol component recovery process effluent, the process comprising the following: ① From flash: the low-boiling alcohol method pulping liquor is flashed and the flash condensate obtained residual liquid; ② wood isotope separation: the residual liquid was diluted flashing, cooling, filtration, and the filtrate lignin; ③ evaporation: step ② resulting filtrate was evaporated, and the residue obtained condensate. Pulping liquor recovered from the low boiling reagent alcohol method is mainly a mixture of ethanol, water, formic acid, acetic acid and furfural and the like, can be directly reused with cooking, can be further recovered formic acid, acetic acid and furfural, and lignin degradation byproducts sugar and the like are important chemical raw material, the method may implement closed loop reagent cooking cooking, the cooking process and to significantly reduce the water consumption.