Hemicellulose in corn straw: Extracted from alkali solution and produced 5-hydroxymethyl furfural in HCOOH/HCOONa buffer solution

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• 作者：Yan Li ; Hongxian Fan ; Xueqing Yu ; Songmei Zhang ; Gang Li ; ^{ligang@hebut.edu.cn}
• 关键词：Hemicellulose ; HMF ; Degradation ; Buffer solution ; ELSD
• 刊名：Chinese Journal of Chemical Engineering
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：24
• 期：12
• 页码：1786-1792
• 全文大小：734 K
• 卷排序：24

文摘

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.