乙醇胺循环法芦苇高纯木素分离研究  

Research on separating highly pure lignin from reed by circulating ethanolamine

作　　者：张正光[1] 李万利[1] 罗学刚[1] 

机构地区：[1]西南科技大学生命科学与工程学院,四川绵阳621010

出　　处：《中华纸业》2007年第1期80-83,共4页China Pulp & Paper Industry

基　　金：国家高新技术研究发展计划(863计划)资助项目(2002AA322050)

摘　　要：以浓度为60%乙醇胺的水溶液为溶剂循环蒸煮芦苇以分离木素,木素得率最高可达71.44%;利用凝胶色谱、红外光谱、紫外光谱研究了乙醇胺循环法对高纯木素分离的影响。结果表明:乙醇胺循环法分离木素重均分子量最高达6234.14,多分散系数在2～2.7之间,分子量范围分布较窄,且受循环次数的影响不显著。Lignin was separated through circulated cooking reed with the water solution of ethanolamine as solvent at the concentration of 60%, with the highest lignin yield of 71.44%. The effects of ethanolamine circulation on separating highly pure lignin were studied by GPC, IR spectrum and UV spectrum. The results show that the maximum molecular weight of lignin obtained by ethanolamine circulation can reach 6234.14, the nonuniformity index is between 2-2.7, with the molecular weight distributed in a narrow range, and the results influenced by circulation times was not apparent.

关 键 词：循环 有机溶剂 乙醇胺 高纯木素 分离 

分 类 号：TS721.2[轻工技术与工程—制浆造纸工程]