从糠醛渣中提取纤维素的工艺.pdfVIP

学兔兔 化 工 进 展 ·466· CHEMICAL INDUSTRY AND ENGINEERING PROGRESS 20 1 3年第32卷第2期 从糠醛渣中提取纤维素的工艺 袁艳丽，朱春山，张晓渊 (河南工业大学化学化工学院，河南 郑州 450001) 摘 要：以甲酸和过氧化氢作溶剂，采用Milox三段法提取糠醛渣中的纤维素，将蒸煮与碱性过氧化氢漂白过程 相结合，实现了木质素和纤维素分离的无氯漂白工艺，考察了甲酸用量、过氧化氢用量、提取温度和提取时间 对糠醛渣中纤维素提取效果的影响。实验结果表明：当甲酸用量为80mL，过氧化氢用量为14mL，三段反应温 度和时间分别为8O℃反应2．5 h、95℃反应2．5h以及抽滤后加入新鲜溶剂在80℃再反应2．5 h，糠醛渣纤维素 的得率是41．92％，纤维素的含量为85．09％，木质素含量为3．22％。由此可见该工艺优于其它工艺结果，能够更 好地提高糠醛渣的应用价值。 关键词：糠醛渣；纤维素；提取；Milox法 中图分类号：TK124 文献标志码：A 文章编号：1000—6613(2013)02—0466—04 DOI：10．3969~．issn．1000—6613．2013．02．037 Extraction of cellulose from furfural residue YUANYanli，ZHUChunshan，ZHANGXiaoyuan (School ofChemistry and Chemical Engineering，Henan University ofTeclmology，Zhengzhou 450001，Henan，China) Abstract：Cellulose was extracted from furfura1 residue by the Milox three—stage method with formic acid and hydrogen peroxide as agents，which was combined with cooking and bleaching of alkaline hydrogen peroxide，and the totally chlorine—free bleaching process was accomplished in the separation of cellulose and lignin from furfural residue．The effects of form ic acid dosage，hydrogen peroxide dosage，reaction temperature and time on the extraction efficiency were discussed．The results showed that when the appropriate dosage of form ic acid and hydrogen peroxide were 80ml and 1 4ml respectively，the first—stage reaction at the temperature of80℃ for 2．5 hours，the second—stage reaction at 95℃ for 2．5 hours and the third—stag