期刊
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
卷 40, 期 6, 页码 421-433出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/02773813.2020.1835984
关键词
Sustainable chemistry; oxidation; lignin; vanillin; hemicelluloses; selectivity
资金
- Russian Scientific Foundation [20-63-47109]
- Russian Science Foundation [20-63-47109] Funding Source: Russian Science Foundation
The influence of pine wood (Pinus Sylvestris) prehydrolysis on the consumption of main reagents (O-2 and NaOH) in the subsequent catalyzed oxidation of the obtained lignocelluloses into vanillin and pulp has been studied. Prehydrolysis of the feedstock was performed with HCl in the water and gas phases. Catalytic oxidation was performed in an autoclave in an aqueous-alkaline medium in the presence of CuO as a catalyst. Native lignin was shown to be inhomogeneous in the process of oxidation into vanillin, and in the first approximation lignin consists of two fractions: the first, which is easily and selectively oxidized to vanillin, and the second, which is oxidized slowly and non-selectively. Acid-catalyzed prehydrolysis of wood leads to further differentiation of the lignin into the selectively and non-selectively oxidizing fractions. The developed two-stage process (prehydrolysis of wood and oxidation of the resulting lignocelluloses) decreases the consumption of NaOH in the oxidation process by 2-5 times as compared to the known data down to the values of 3.7-5.2 g per g of vanillin obtained.
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