Copper(I) Nitrotetrazolate Lead-Free Primary Explosive
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Solution Overview
Problem
Current primary explosives contain lead, posing environmental concerns and handling challenges, and existing lead-free alternatives lack commercial viability or exhibit undesirable characteristics.
Innovation Solution
A lead-free primary explosive compound, copper(I) nitrotetrazolate, is prepared by reacting cupric chloride, sodium 5-nitrotetrazolate, and sodium ascorbate in water, with controlled heating and washing, to produce a material suitable for use as a primary explosive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lead-containing primary explosives (e.g., lead azide) are used, then reliable detonation sensitivity is achieved, but environmental contamination and handling danger increase
Solution Approach 1:
The patent changes the chemical composition parameters by substituting lead with copper and modifying the tetrazole structure with nitro groups at specific positions, creating copper(I) nitrotetrazolate with optimized sensitivity and safety characteristics while eliminating lead contamination
Solution Approach 2:
The invention uses copper-based compounds that are less hazardous and more environmentally friendly than lead azide, sacrificing some historical reliability precedence but gaining improved safety and environmental compatibility for modern applications
2Object-affected harmful factors
If existing lead-free primary explosives (e.g., nitrotetrazole complexes) are used, then lead contamination is eliminated, but handling difficulty and commercial viability decrease
Solution Approach 1:
The patent optimizes the molecular structure by positioning nitro groups at specific locations (5-nitrotetrazolate) and controlling crystal formation to achieve a balance between eliminating lead and improving handling characteristics through favorable crystal morphology and density
Solution Approach 2:
The invention creates a composite copper(I) nitrotetrazolate compound that combines the benefits of lead-free composition with improved physical properties for handling, achieving a material that is both environmentally friendly and practically manageable
3Object-affected harmful factors
If copper(II) complexes are used, then lead-free composition is achieved, but crystalline structure becomes difficult to work with
Solution Approach 1:
The patent reduces copper from the +2 oxidation state to +1 (copper(I)) and combines it with 5-nitrotetrazolate anions, creating a compound with a simpler, more workable crystalline structure that maintains lead-free composition while improving manufacturability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The resulting copper(I) nitrotetrazolate exhibits suitable thermal stability, ease of handling, and low toxicity, making it a viable and environmentally friendly primary explosive for both military and commercial applications.
Implementation Method 1
The compound is prepared by reacting cupric chloride, sodium 5-nitrotetrazolate, and sodium ascorbate in water
Implementation Method 2
heating the mixture; adding a reducing agent; and heating the combination
Data Source
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AI summary
Embodiments of the present subject matter provide a compound and material that may be used as a lead-free primary explosive. An embodiment of the present subject matter provides the compound copper(I) nitrotetrazolate. Certain embodiments of the present subject matter provide methods for preparing lead-free primary explosives. The method includes: providing a cupric salt; providing water; providing a 5-nitrotetrazolate salt; combining the cupric salt, water and 5-nitrotetrazolate salt to form a mixture, heating the mixture, adding a reducing agent and stirring with continued heating. The method may also include providing cupric chloride, sodium 5-nitrotetrazolate and sodium ascorbate. Certain embodiments of the present subject matter also provide methods for preparing copper(I) nitrotetrazolate. The method includes: providing cupric salt; providing water; providing 5- nitrotetrazolate salt; combining the cupric salt, water and 5-nitrotetrazolate salt to form a mixture, heating the mixture, adding a reducing agent and stirring with continued heating. The method may also include providing cupric chloride, sodium 5-nitrotetrazolate and sodium ascorbate.