Producing Lignin and Ethyl Levulinate from Wheat Stalk Using 1-(3-Sulfobutyl) Triethylammonium Hydrogen Sulfate and USY Zeolite

被引：0

作者：

Wang, Dingkai ^{[1
]}

Cui, Mingyu ^{[1
]}

Li, Yanjun ^{[1
,2
]}

Zhao, Wei ^{[1
]}

Ma, Shangshang ^{[1
]}

Jiang, Zhijie ^{[1
]}

Liu, Xutang ^{[1
]}

Liang, Chong ^{[1
]}

Li, Rujuan ^{[3
]}

Ma, Long ^{[3
]}

Song, Yanmin ^{[3
]}

Wei, Xian-Yong ^{[1
]}

机构：

[1] China Univ Min & Technol, Key Lab Coal Proc & Efficient Utilizat, Xuzhou 221116, Jiangsu, Peoples R China

[2] Yulin Univ, Sch Chem & Chem Engn, Shanxi Key Lab Low Metamorph Coal Clean Utilizat, Yulin 719000, Shanxi, Peoples R China

[3] Cosychem Technol Tianjin Co Ltd, Tianjin 300450, Peoples R China

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 2023年 / 71卷 / 04期

关键词：

wheat stalk; ionic liquid; USY zeolite; lignin; ethyl levulinate; IONIC LIQUID; LIGNOCELLULOSIC BIOMASS; SUGARCANE BAGASSE; DIRECT CONVERSION; SULFURIC-ACID; EXTRACTION; CELLULOSE; PRETREATMENT; EFFICIENT; GLUCOSE;

D O I：

10.1021/acs.jafc.2c07563

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

The facile, green, and efficient strategy for the separation of lignin from straw and subsequent production of valueadded chemicals is crucial to the current utilization of straw. Herein, up to 23.72% of lignin was isolated from wheat stalk over cheap and green 1-(3-sulfobutyl) triethylammonium hydrogen sulfate ([BSTEA]HSO4) in aqueous ethanol (Vethanol: Vwater = 4:1). The acquired lignin was verified as a p-hydroxyphenyl-guaiacyl-syringyl type, which had a narrower molecular weight distribution, better thermal stability, and higher purity compared with those of the lignin obtained using 1-methyl-3-(4-sulfobutyl)-imidazolium hydrogen sulfate and 1-(3-sulfobutyl) pyridinium hydrogen sulfate. Moreover, a carbohydrate-rich liquid containing [BSTEA]HSO4 was obtained by water removal from the waste liquid after lignin separation and further converted to ethyl levulinate (EL) by a one pot process in the presence of inexpensive and stable USY zeolite. The yield of EL reached 30.23% at 200 degrees C for 60 min over the presence of 40% [BSTEA]HSO4 and 60% USY zeolite. Under optimal conditions, the yields of lignin and EL can respectively reach 83.89 and 72.28% of those catalyzed by a fresh catalyst after five cycles. In short, the above-mentioned methods present a green, economic, and efficient route for the extraction of lignin and further treatment of the liquid waste generated during the extraction process.

引用

页码：2026 / 2037

页数：12