Process and apparatus for preparation of finely grained lead azide
US4954329A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1989 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Jul 17, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC06B35/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides a process for the preparation of finely grained lead azide, in which aqueous solutions of lead nitrate and sodium azide are stirred in a vessel at constant temperature, characterized in that in a first process step the aqueous solution of lead nitrate and a small amount of an aqueous solution of sodium citrate are poured into the vessel, in a second process step, the aqueous solution of sodium azide is dosed into the vessel over a period of time of 30 to 40 minutes, the aqueous solutions poured into the vessel are agitated at a peripheral stirring speed of between 0.2 m/sec and 1.0 m/sec., and the constant temperature is set to a value of 50.degree. C. to 80.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.