Hemicellulose in corn straw:Extracted from alkali solution and produced5-hydroxymethyl furfural in HCOOH/HCOONa buffer solution

作     者：Yan Li Hongxian Fan Xueqing Yu Songmei Zhang Gang Li 

作者机构：Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving School of Chemical Engineering and Technology Hebei University of Technology 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2016年第24卷第12期

页      面：1786-1792页

核心收录：

学科分类：081702[工学-化学工艺] 082903[工学-林产化学加工工程] 08[工学] 0817[工学-化学工程与技术] 0829[工学-林业工程] 

基　　金：Supported by the National Natural Science Foundation of China(No.21576067) 

主　　题：Hemicellulose HMF Degradation Buffer solution ELSD 

摘      要：Hemicellulose in corn straw is a group of complex heteropolysaccharides which are composed of different sugar units, including mannans, xylans, arabinans and galactans. This study developed a simple and practical process for production of 5-hydroxymethyl furfural(HMF) using hemicellulose that was extracted from corn straw. In the hemicellulose degradation process HCOOH/HCOONa was used as buffer solution, and the optimum conditions for maximum HMF yield were explored. Various extraction conditions including NaOH concentration, reaction time,temperature, solid-to-liquid ratio and precipitant were tested for hemicellulose obtaining, giving the optimum condition of 55 °C, 4 h, solid-to-liquid ratio of 1:10, 1.5 mol·L^(-1) NaOH solution and ethanol as precipitant with the yield of 34.16%. Dehydration of hemicellulose under HCOOH/HCOONa buffer solution process, using solution medium of pH = 0.8 hydrolyzed hemicellulose in corn straw at 190 °C after 190 min and 82% of HMF yield was achieved.