Analysis on leakage reasons of chlorine liquefier were anlysed from manufacture, test and application. The liquefier was failure, and the protective measures were put forward.

从制造、检验、使用等方面对氯气液化器、失效因进行了详细分析,针对失效因提出了防护措施。

The article is about how to use phosgene and p-nitrophenylamine to react in acetic ether's liquefier to produce p-nitro-phenyl isocyanate, Its best technological condition have been discussed.

介绍用光气和对胺在乙酸乙酯溶剂中反应来制备对异氰酸酯方法，并讨论了其最佳工艺条件。