芦苇乙醇法分离木素制浆研究(Ⅲ)  

Studies on delignification from reed by ethanol(Ⅲ)

作　　者：李万利[1] 罗学刚[1] 

机构地区：[1]西南科技大学材料学院,四川绵阳621010

出　　处：《中华纸业》2005年第11期42-45,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：在前面[1]、[2]研究的基础上,仍采用L1(543)正交试验方法,研究了蒸煮时间由1.0h延长到2.0h后乙醇、催化剂和液固比等因素对木素、纤维素分离的影响。试验结果表明:延长蒸煮时间后,各试验因素仍在各因素中值处交汇,以后随着试验因素水平的增高,影响木素、α-纤维素分离的主要因素是乙醇;乙醇和液固比相互作用对木素分离具有显著的交互作用;在70%乙醇、3%催化剂和4∶1液固比条件下,可以得到较好的木素、纤维素分离效果;与前文研究相比,结构没有发生变化,所得木素重均分子量和分散指数分别增加为3420.8和2.16。On the basis of [1 ] and [2], L15 （43） orthogonal experimental method was used to investigate the influences of such factors as ethanol, catalyzer and liquid-solid ratio etc. on separating lignin and cellulose with the time prolonged from 1.0h to 2.0h. The results indicate that： all the experimented factors intercrossed at the median point of all factors, then with the increase of levels of the experimented factors, the major factor influencing lignin and α -cellulose separation was the ethanol; the interaction of the ethanol and liquid-solid ratio also had a notable effect on the separating process; under the conditions of ethanol 70%, catalyzer 3% and liquid-solid ratio 4：1, the separating results were more preferable. Compared with [ 1 ] and [2], the structure of lignin did not change with its average molecular weight and distribution index increased to 3420.8 and 2.16 respectively.

关 键 词：乙醇 芦苇 木素 纤维素 

分 类 号：TS743.9[轻工技术与工程—制浆造纸工程]