摘要
分别以乙醇、乙醇/水、水为提取剂,研究从白桦树皮中提取桦木醇的工艺,确定了用乙醇作提取剂的最佳提取工艺条件:固液比(g∶mL)为0.083,抽提时间6,h;分别用异丙醇和乙醇作溶剂,通过两步重结晶操作,纯化桦木醇,得到桦木醇产品的产率达19.8%,熔点257.7～258.9,℃,纯度98%.
The technological conditions for extraction of betulin from the outer bark of white birch were investigated.Etha-nol,ethanol/water and water were used as extraction solvents.The suitable extraction conditions were determined for extrac-tion of betulin with ethanol as extraction solvent as followsr：atio of solid to liquid was 0.083,extraction time 6 h.Crude betulin was puritied and high purity produce was obtained by two step recrystallization.The yield of betulin reached 19.8%,melting point was 257.7-258.9,℃,and the purity was 98%.
出处
《天津科技大学学报》
CAS
2011年第6期48-50,55,共4页
Journal of Tianjin University of Science & Technology
基金
天津市科技计划项目(10JCZDJC22500)
天津市高校科技发展基金项目(20080311)
关键词
白桦树皮
桦木醇
提取
纯化
重结晶
white brich bark
betulin
extraction
purity
recrystallization
