针对精苯装置预备蒸馏系自投料生产以来存在的喷苯现象，从操作和设计等方面进行原因分析并采取相应的改进措施。
As for the existing benzene-spurting for the stand-by distillating pump since test running, we analyse it from the aspects of operation and design and raise the corresponding innovative approach.
精苯废酸组成极为复杂，长期以来对精苯废酸的处理没有合适的解决方法。
The waste acid from benzol refining is a very complex mass and we has no better method to deal with it for a long time.
目的：观察茶皂素对壬苯醇醚(N 9)的杀精增效作用。
Objective: To study the effect of tea saponin in ameliorating nonoxynol (N-9) spermicidal action in vitro.
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