Process for preparing modified black powder pellets

Details Process for preparing modified black powder pellets Process for preparing modified black powder pellets

1974-08-21

1976-02-10

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Explosive or propellant article shaping or treating

Rolling to form sheet or rod

C60B 2102

Patent

active

039377717

ABSTRACT:
Black powder pills of excellent ignition properties are obtained by a simfied process, wherein an aqueous solution of KNO.sub.3 is introduced into an alcoholic medium, such as ethanol, in the presence of finely divided particles of sulfur and wood charcoal and/or carbon black and a small amount of a polyvinyl pyrrolidone, whereby the KNO.sub.3 is precipitated in finely divided form in intimate mixture with the particles of sulfur and carbon. The resulting particulate mixture contains an extremely thin surface film of adsorbed polyvinyl pyrrolidone, and is separated from the liquid and dried. The modified black powder thus obtained can be safely handled in the dry state and compressed into pills possessing ignition properties equivalent to standard black powder granules. The novel process provides excellent particle size control and reproducibility and eliminates time consuming, hazardous steps and special apparatus used in the conventional commercial black powder process.

REFERENCES:
patent: 3660546 (1972-05-01), Lovold

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