废己烷可以通过沸点的差异得到回收，废己烷总量的95%得到回收利用，总量的5%作为废液排出。
The waste hexane could be recovered by the difference of boiling points. About 95% of waste hexane was recovered and reused.
它是造纸厂排出的废液中的主要成分，是主要的水污染源之一。
But lignin becomes one of the main pollution sources, coming from waste water in the paper-making factory.
系统全封闭，可自动更换溶剂和排出废液，避免有毒试剂外逸。
Whole system is sealed, preventing escaping of poisonous gas. Automatic reagent change, automatic discharge waste water.
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