Accession Number : ADD006562

Title :   Electrolysis of lead Azide.

Descriptive Note : Patent Application,


Personal Author(s) : Polson,J

Report Date : 14 Sep 1979

Pagination or Media Count : 24

Abstract : This invention relates to a method of disposing of lead azide by subjecting the lead azide to electrolysis and recovering the lead which plates out on the cathode. More particularly, this invention relates to a method of subjecting lead azide to electrolysis using a basic electrolysis solution and stainless steel or lead electrodes. Nitrogen is evolved at the anodes. The preferred electrolysis solution (electrolyte) is sodium hydroxide having a concentration of from 10% to 20%. The physical form of the lead recovered can be spongy or dense. The dense lead is preferred because it adheres well to the cathode. The use of from about 0.2% to about 0.6% by weight rosin powder and about 5% by weight sodium-potassium tartrate in the electrolyte, in addition to the sodium hydroxide, is preferred since it inhibits the formation of lead oxide and aids in the plating of dense lead. The preferred temperature of operation is about 180 F. Voltages of from about 2 to 8.5 can be used. The preferred current density is about 0.085 amperes per square inch, using from about 2.3 to 3.0 volts and about 1000 to 3000 amperes. In order to insure that the lead deposited on the cathode adheres well, the cathode can be etched. The process of this invention can accomplish the destruction of about 10 to 30 pounds of lead azide per hour with the preferred conditions resulting in the destruction of about 25 to 30 pounds of lead azide per hour. (Author)

Descriptors :   *Patent applications, *Lead azides, *Electrolysis, *Disposal, Electrodes, Stainless steel, Lead(Metal), Electrolytes, Solutions(Mixtures), Sodium hydroxide, Tartrates, Stockpiles, Pollution abatement, Reclamation

Subject Categories : Physical Chemistry
      Civil Engineering
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE