Method for producing ecological explosive for primer compositions of ammunition

Method for producing ecological explosive—basic bismuth(III) salt of 5,5′-bis-azotetrazole, for primer compositions of ammunition, characterized in that it comprises the following steps:

• a. preparation of 0.01 to 0.1 M solution of bismuth (III) alkane sulphonate in distilled/demineralized water;
• b. adjustment of pH of the prepared solution to a value around pH=2.5 by titration with 1-5 N solution of hydroxide of alkali metal;
• c. heating of thus treated solution to the boiling temperature followed by precipitation with 3-5% by weight of aqueous solution of 5,5′-azotetrazolate of alkali metal, relative to weight of azotetrazolate, under intensive stirring;
• d. heating of the formed suspension at the boiling temperature for at least 3 min;
• e. leaving the suspension containing the precipitate to cool down to room temperature under stirring for a necessary period of time and then leaving it to stand overnight;
• f. filtration of the suspension through a filter, washing of the precipitate with distilled/demineralized water, and dehydration with an organic solvent miscible with water;
• g. drying of the amorphous deep yellow basic bismuth (III) salt of 5,5′-bis-azotetrazole at room or elevated temperature.