Two-step conversion of Kraft lignin to nylon precursors under mild conditions

被引：36

作者：

Zhou, Hui ^{[1
]}

Wang, Hsin ^{[1
,2
]}

Perras, Frederic A. ^{[1
]}

Naik, Pranjali ^{[1
,2
]}

Pruski, Marek ^{[1
,2
]}

Sadow, Aaron D. ^{[1
,2
]}

Slowing, Igor I. ^{[1
,2
]}

机构：

[1] US DOE, Ames Lab, Ames, IA 50011 USA

[2] Iowa State Univ, Dept Chem, Ames, IA 50011 USA

来源：

GREEN CHEMISTRY | 2020年 / 22卷 / 14期

关键词：

LIGNOCELLULOSE FRACTIONATION; CATALYTIC FRACTIONATION; MONOMER PRODUCTION; ALCOHOL OXIDATION; MODEL COMPOUNDS; BOND-CLEAVAGE; HIGH-YIELD; IN-SITU; DEPOLYMERIZATION; HYDROGENOLYSIS;

D O I：

10.1039/d0gc01220c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This study explores the valorization of Kraft lignin by conversion into nylon precursors in a two-step process. First, lignin was depolymerized in dilute alkaline aqueous solution under atmospheric N(2)at 200 degrees C to give guaiacol with high selectivity (>80%) with a total monomer production of 13% based on lignin input. Solution and solid state NMR analyses and reactions of model compounds indicated that depolymerization took placeviacleavage of beta-O-4 bonds in lignin. In the second step, lignin-derived guaiacol was selectively converted to the nylon precursors cyclohexanol/cyclohexanone (KA oil) using Ru/C catalyst under 1 bar H(2)and 150 degrees C. This two-step process constitutes a low-temperature and low-pressure pathway for producing value-added chemicals from lignin using water as the reaction solvent.

引用

页码：4676 / 4682

页数：7

共 77 条

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