水/有机溶剂混合体系去除秸秆木素的研究  

Study on the Delignification of Rice Straw with Water/Organic Solvent Systems

作　　者：朱世步[1] 姜曼[1] 王伟[1] 周祚万[1] 

机构地区：[1]西南交通大学材料科学与工程学院材料先进技术教育部重点实验室,成都610031

出　　处：《材料导报》2010年第18期50-53,共4页Materials Reports

基　　金：四川省科技支撑计划资助项目(09GG1632)

摘　　要：研究了常压条件下水/有机溶剂体系对于水稻秸秆木素的脱除效果,考察了水/甲醇、水/N-甲基吡咯烷酮(NMP)、水/二甲亚砜(DMSO)和水/二甲基甲酰胺(DMF))及其在添加酸(水杨酸、甲酸、对苯二甲酸)或碱(氢氧化钠、苯胺)等助剂条件下的木素脱除率。残留木素和红外谱图分析表明,在不添加催化剂的条件下,水/非质子溶剂体系的效果优于水/甲醇等有机质子溶剂体系,水/DMSO体系、水/NMP和水/DMF体系的木素脱除率分别达到63.27%、75.14%和84.78%,而水/甲醇体系的木素脱除率为57.13%;在溶剂体系中添加少量苯胺可以有效提高木素脱除率,水/甲醇中添加苯胺后木素脱除率从57.13%提高到79.99%,水/DMF中添加苯胺后木素脱除率从84.78%提高到95.04%,处理后的样品酸不溶木素含量仅剩0.87%。回收的溶液经减压蒸馏回收木素和溶剂,溶剂回收率达到99%以上,并可循环使用。Delignification of rice straw with wator /organic solvent systems is studied at atmosphere condition.The delignification of wator/mothanol,water/N-mothylpyrrolidone（NMP）,water/dimethylsulfoxide（DMSO）,and water/dimethylfemamide（DMF）are investigated with eatalysts of acid（salleylie acid,fermic acid,terephthalic acid ）or alkaline （sedium hydroside,aniline）,It is indicated that the delignification with water/aprotic solvent systems is superior to that with water/protic solvent system.The delignifleation with the water/DMSO,water/NMP and water/DMF system reach 63.27%,75.14% and 84.78%,respeatively ,while which with water/methanol system is only 57.13%,The delignifieation can be effectively Improved by adding anlline as catalyst （from 57.14% to 79.99% in the water/methanol system and from 84.78% to 95.04% in water/DMF system,respectively）,The acid-insoluble lignin only remains 0.87% in treated sample.The separated lignin is reclaimed by vacuum distillation ,in the same time ,the mlned solvent recovery is over 99% and can be recyeled.

关 键 词：水稻秸秆 水/有机溶剂体系 脱木素作用 

分 类 号：TS721.4[轻工技术与工程—制浆造纸工程]