期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 58, 期 19, 页码 7794-7800出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.9b01147
关键词
-
资金
- USDA NIFA McIntire Stennis grant [WIS01861]
- National Science Foundation of China [21706085]
- China Scholarship Council [201708350043]
Phenolation is an effective method to improve the reactivity of lignin in the synthesis of lignin-phenol-formaldehyde (LFP) resin. Previous lignin phenolation was almost exclusively catalyzed by acid. This study investigated the phenolation of kraft lignin (KL) in alkaline medium under different conditions of the mass ratio of phenol to lignin, reaction temperature, and reaction time. Results indicated that under the conditions of a mass ratio of phenol to KL of 3:1, a temperature of 160 degrees C, and time of 2 h, KL was depolymerized to phenolated lignin segments (51.2%), monomeric and dimeric phenolics (12.5%), and organic acids (36.3%). The lignin segments had low molecular weight, narrow dispersity, and high phenolic hydroxyl group (4.5 mmol/g), which could be used as precursors of LFP resin/adhesive. The phenolics and organic acids would have a potential as platform chemicals.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据