Title
Dissolution behavior of pentosan in corn straw from hot-water extraction and purification using ion exchange resins
Authors
HONGLEI CHEN YU LIU FANGONG KONG LUCIAN A. LUCIA and RUI LOU

Published Volume 50 Issue 5-6 May-June
Keywords corn stalk, hemicellulose, pentosan, hot-water extraction

Abstract
Corn stalk is a lignocellulosic material containing up to 22.52% pentosan and has great potential industrial applications. Hot-water extraction was used to extract hemicellulose from corn stalk in this study. The results showed that xylose and arabinose are the main sugars existing in the hot-water extract (HWE). The ratio of xylose to arabinose depended on extraction temperatures and ranged from 7.90 at 140°C to 10.40 at 170°C.The maximum yield of pentose was65.4% (134.72 g xylose per kg corn stalk)at 160°C for 180 min extraction. The sugars in HWE were purified by selective elimination of lignin-derived compounds by using ion exchange resin and the results showed that up to85.21% was removed. The study indicated that the combination of hot-water extraction with resin treatment is an effective and economic means for hemicellulose production from corn stalk.