System for electrochemical decomposition of sodium azide
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United States of America Patent
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Feb 15, 2000
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N/A
app pub date -
Aug 15, 1997
filing date -
Aug 15, 1997
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Abstract
A process and an apparatus for electrochemical decomposition of sodium azide in aqueous alkaline solutions form sodium hydroxide, ammonia, nitrogen, and oxygen. The apparatus contains five major parts, which are (1) an electrolyzer which contains one or more cell units, (2) a rectifier which supplies D.C. electrical current to the electrolyzer, (3) a tank which holds the electrolyte (containing sodium hydroxide and sodium azide) needed to be processed in the electrolyzer, (4) a vacuum which can remove off gases generated by electrolysis in the electrolyzer, and (5) a recovery system which can further separate off gases. It is optional to add a pump in between the tank and the electrolyzer to be used for filling, mechanical agitation, or recycle. The process includes (1) transferring the aqueous solution containing the sodium azide to the electrolyzer, (2) subjecting the aqueous solution to electrolytic action to decompose the sodium azide and to generate off gases including nitrogen, oxygen, and ammonia, and (3) removing off gases. The off gases can also be removed by vacuum and recovered separately in a recovery system.
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