METHOD FOR PRODUCING (5-NITROTETRAZOLATO-N) PENTAAMMINECOBALT (III) PERCHLORATE Russian patent published in 2022 - IPC C06B29/00 C06B49/00 C07D257/04 

FIELD: chemical or physical processes.

SUBSTANCE: invention relates to methods of producing explosives, particularly methods of producing perchlorate (5-nitrotetrazolato-N²)pentaamminecobalt(III) [Co(NH₃)₅ O₂N-CN₄](ClO₄)₂ (NCP)

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which can be used in production of higher safety initiation means with different type of activation for use in mining and coal mining industry, in oil production during well perforation, in construction and special equipment. 5-nitrotetrazole sodium salt reacts with cobalt-containing compound while heating. Initial cobalt-containing compound used is chloropentaamminecobalt(III) chloride, preliminarily dissolved in aqueous ammonia while heating, followed by acidification of the obtained solution with perchloric acid to concentration of perchloric acid of 1.0–4.0%. Reaction is carried out at temperature of 80 to 96°C and molar ratio of starting compounds chloropentaamminecobalt(III) chloride / tetrahydrate of sodium salt of 5-nitrotetrazole = 1/1.2–1/1.5. Sodium salt of 5-nitrotetrazole is used after purification of the reaction mass of its synthesis by an adsorption method in the form of an aqueous solution.

EFFECT: providing safety and simplifying the process of producing NCP.

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