摘要
采用有机溶剂和无机溶剂结合的方法,提取纯净的木质素.首先通过酸析的方法,从芦苇造纸废液中提取粗的木质素,研究了pH值为2.0,反应温度为60℃,絮凝时间为45min,絮凝温度为70℃是提取木质素的最佳条件.然后用乙醇对粗木素进行纯化,分离提取纯木质素,由红外光谱(FTIR)、紫外-可见光谱(UV-Vis)、核磁共振(1 H NMR)、元素分析、以及热重TG分析技术对纯木质素进行了分析,可知芦苇造纸废液中的木质素主要是由紫丁香基团和愈创木基团组成.通过分析其结构,对其进行改性,合成应用于油田驱油方面的表面活性剂。
Lignin is extracted from Reed black liquor of papermaking through the method of the organic solvent and inorganic solvent in this article.Firstly,through the acid-precipitation method,collecting Lignin from the black liquor of Reed pulping,we come to a conclusion that the best condition of acid precipitation lignin is：pH =2.0,the reaction temperature is 60 ℃,flocculation time for 45 min,flocculation temperature is 70 ℃.Then using the ethanol to separate the pure lignin out,and through the infrared spectrum,ultraviolet spectrum,1H NMR spectrum,etc method to pure lignin structure characterization.We can know the main constituent of the lignin from the black liquor of Reed pulping is and syringyl alcohol.And the syringyl alcohol is more than the guaiacyl alcohol.
出处
《分子科学学报》
CAS
CSCD
北大核心
2012年第6期441-447,共7页
Journal of Molecular Science
基金
国家科技重大专项课题"提高稠油蒸汽驱效率技术"项目(2011ZX05012-003)
国家自然科学基金资助项目(21046002)
黑龙江省自然科学基金资助项目(QC08C33)
关键词
黑液
酸析
木质素
结构
the black liquor
acid precipitation
lignin
structure
