Process for producing 5,5–azo and -hydrazo derivatives of explosive tetrazoles

WO2026046446A3 Publication Date: 2026-03-26SELLIER & BELLOT
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Patent Information

Application Number
PCT/CZ2025/050069
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-08-28
Filing Date
2025-08-27
Publication Date
2026-03-26

AI Technical Summary

Technical Problem

Existing methods for producing 5,5-azo and -hydrazo derivatives of explosive tetrazoles, such as 5,5-bis-azotetrazole and 5,5-bis-tetrazolyl hydrazine, face challenges in scalability due to the formation of toxic by-products, complex separation processes, and the use of exotic or unavailable oxidants, making them unsuitable for industrial production.

Method used

The use of peroxodisulfate as a common oxidant in a strongly alkaline environment at controlled temperatures and concentrations, combined with specific separation methods, allows for efficient production of these derivatives with high yields and minimal toxic waste, using readily available chemicals and simple separation techniques.

Benefits of technology

This approach achieves yields of up to 85% for both 5,5-azo and -hydrazo derivatives, overcoming scalability issues and reducing the formation of hazardous by-products, making it suitable for industrial applications.

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Abstract

The invention describes a process for producing soluble salts of 5,5-azotetrazole (5,5-AT) by oxidation of 5-aminotetrazole with a soluble peroxodisulfate in a strongly alkaline environment. This compound is a precursor of the energetic component of non-toxic priming mixtures, 5,5- bis-hydrazino-tetrazole (BTH). BTH can be prepared by reduction of salts or solutions of 5,5-AT with ascorbic acid. 5,5-AT
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