PREPARATION AND CHARACTERIZATION OF LIGNOSULFONATE FROM ALKALI EXTRACTED LIGNIN

摘要：

A lignosulfonate was prepared from alkali extracted lignin by oxidation and sulfomethylation. Lignin was treated by the mixture of hydrogen peroxide and ferrous sulfate, subsequently sulfomethylated by formaldehyde and sodium sulfite. The number average relative molecular mass of the resulting lignosulfonate was 1400, while that of alkali extracted lignin was 4600. The sulfonic group content of lignosulfonate increased with the increase in the consumption of sodium sulfite or the increase in the sulfonation time. The maximum content of sulfonic group in lignosulfonate achieved approximately 1.3mmol/g. The surface activity of lignin was improved after oxidation and sulfomethylation.

关键词： alkali extracted lignin oxidation sulfomethylation surface tension

作者: Huiran Wu Fangeng Chen

作者单位: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 200-203

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）