A Continuous Lead Azide Process

One process, developed by the Bofors-Liab Company in Sweden leads to the precipitation of 3-lead azide in a pure form. The precipitate is washed and allowed to stand in water overnight, where it recrystallizes to the a form. The product is claimed to be veiy pure but with a density less than that of Service lead azide. 

The other process is the Meissner process, described in detail in Urbanski s Volume in [8]. The process as shown or as applied by the French [Atelier de Construction, Tarbes (ATS)] is continuous only during methathesis, the subsequent filtering, washing, and drying steps are batch operations. 

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