从稻壳中提取木聚糖的研究

STUDY ON EXTRACTION OF XYLAN FROM RICE HULL

摘要: 以稻壳为原料,采用制备综纤维素再碱提取的方法,分析了不同碱溶液浓度、温度、固液比和时间对稻壳半纤维素中多戊糖得率的影响.实验结果表明,稻壳中多戊糖含量为19.9%,是较好的木聚糖资源.碱提取稻壳中木聚糖的方法为:预处理:80℃水浸泡3 h;碱提取条件:碱质量分数10%,固液比(g:mL)l:10,提取时间3 h,提取温度80℃.木聚糖提取率达原料中木聚糖总量的67.50%以上.

Abstract: Using rice hulls as raw material, the experiment utilized the method of alkali extraction after rice hulls were pretreated. Effects of alkali concentration, extraction temperature, ratio of solid to liquid and extraction time on yields of xylan were analyzed. The result showed: the content of xylan in rice hull reached 19.9%, showing a good raw material. The conditions of alkaline extraction were: pretreatment: water immersed for 3 h at 80℃; alkali concentration 10%, ratio of solid to liquid 1:10(g:mL), extraction time 3 h, extraction temperature 80℃. The yield of xylan from rice hull reached over 67.50%.