木质素
分馏
溶解度
化学
有机化学
分散性
解聚
分数(化学)
聚合物
生物净化
化学工程
生物炼制
原材料
工程类
作者
Hasan Sadeghifar,Arthur J. Ragauskas
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2020-05-22
卷期号:8 (22): 8086-8101
被引量:143
标识
DOI:10.1021/acssuschemeng.0c01348
摘要
Technical lignin extracted from pulping and biorefining processes provides a class of complex and polydisperse phenolic polymers. Preparation of lignin with lower structural complexity and polydispersity through lignin fractionation is one of the primary solutions to engineer lignin into a value-added material. Sequential lignin fraction by pH controlled precipitation from 12 to 1 is one of the primary developed methods. Partial solubility of lignin in organic solvents is another promising method for lignin fractionation. Organic solvents with different polarity and solubility factors are able to fractionate lignin, yielding a more homogeneous chemical structure. As a modification of the lignin fractionation process using solvents, water/organic solvents mixture, such as propan-2-one, alcohols, and acetic acid, from room to high temperature has been proposed as a greener method for lignin fractionation. Using membrane technology is another promising method and current results indicate a good potential for lignin recovery and fractionation.
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