Abstract: Holocellulose from birch wood can be prepared by the bromine method under proper conditions. The best bromination temperature is 20℃, and the time for bromination is five minutes per treatment. A monoethanolamine-1,4-dioxane solution provides a good solvent for the brominated birch lignin. A suitable concentration of monoethanolamine is 5%, and the proper temperature for extracting the brominated lignin is 70℃. The preparation of holocellulose from birch wood needs less repetitions of bromination and extraction than the chlorinedioxane method for the same Klason lignin and pentosan. Besides, both the equipment and operation are simpler for the bromine method.

摘要： 通过溴化-抽提法在适宜条件下制备桦木综纤维素.最佳溴化温度是20℃.每次溴化处理时间为五分钟.乙醇胺-二氧杂环已烷溶液是桦木溴化木素良好的溶剂.乙醇胺的合适浓度是5%.用该溶剂抽提溴化木素最适宜的温度为70℃.溴法所用的卤化与抽提处理次数少,且所需仪器简单,操作方便.