Method for removing lignin from plant fiber

• Main Authors: ZHANG KAIBIN, SHAN SHAOYUN, LU CHENGCAI, MIAO YINGJU, LI CHONGBIN
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2020
• Subjects: APPARATUS THEREFOR; IMPREGNATING OR COATING OF PAPER; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS; PULP COMPOSITIONS; REGENERATION OF PULPING LIQUORS; TEXTILES; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G

The invention discloses a method for removing lignin from plant fiber. The method comprises the following steps: crushing a plant fiber raw material to be delignified, adding the crushed plant fiber raw material to a persulfate solution, and soaking the crushed plant fiber raw material at room temperature to obtain a mixed material; heating the mixed material at a constant temperature for hours under the stirring condition; and performing solid-liquid separation, and repeatedly washing an obtained solid with water to neutrality to obtain delignified fiber. The delignifing rate of the method can be as high as 96.6%; compared with processes of the traditional sodium chlorite method, the chlorine-ethanolamine method, the chlorine dioxide method, the peracetic acid method, the peracetic acid-sodium borohydride method and the like, the method for removing lignin from plant fiber is easy to operate, and has short process flow, low energy consumption and low environmental harm. 本发明公开了一种植物纤维中木素的脱除方法，将待脱除木素的植物纤维原料破碎，加