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A method for passivating tkx-50 using nitroguanidine as a desensitizing agent

A technology of TKX-50 and nitroguanidine, applied in the direction of non-explosive desensitizer/passivator, non-explosive/non-thermal agent components, explosives, etc., can solve immature coating process, explosive performance and mechanical properties Ideal, low mechanical sensitivity and other issues, to achieve the effect of improving surface morphology, safe and reliable operation, and simple preparation equipment

Active Publication Date: 2020-10-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The insensitive coating of TKX-50 affects the compatibility of materials and the performance of mixed explosives. The explosive performance and mechanical properties of TKX-50 coated by the current method are not ideal.
Modern desensitizing agent-coated explosives mostly adopt supercritical solution rapid expansion (RESS) technology. This technology does not require water and organic solvents, and is safe and environmentally friendly. However, this method is still in the initial research stage, and the coating process is not yet available. Mature
Nitroguanidine (NQ) is a white needle-like crystal with extremely low mechanical sensitivity, and its impact sensitivity and friction sensitivity are 0%. It can be used as a deactivator for mixed explosives, but there is no literature report on the insensitive TKX-50

Method used

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  • A method for passivating tkx-50 using nitroguanidine as a desensitizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method of passivating TKX-50 using nitroguanidine as a desensitizing agent: at 70°C, with a stirring speed of 300r / min, add 5g of nitroguanidine to 300g of distilled water and stir for 30min to form a uniform mass fraction of 1.64% nitroguanidine solution; keep the temperature at 70°C, add 95g TKX-50 to the nitroguanidine solution obtained above, and stir to make it evenly suspended under the stirring condition of rotating speed 200r / min; Under the stirring condition of 90r / min, the temperature of the obtained suspension was raised to 75°C, and after 30min of heat preservation, the temperature was rapidly cooled to 60°C within 2 minutes; Continue to slowly cool down the above suspension to 10°C, and let it stand for 30 minutes until the crystals are completely precipitated from the solution; filter, wash, and dry at a vacuum of 0.06MPa and a temperature of 30°C for 4 hours; TKX after nitroguanidine insensitivity is obtained -50.

[0021] Obtain the TKX-50 white powde...

Embodiment 2

[0023] A method of passivating TKX-50 using nitroguanidine as a desensitizing agent. At 60°C with a stirring speed of 225r / min, add 4g of nitroguanidine to 250g of ethanol and stir for 30min to form a uniform mass fraction of 1.57 % nitroguanidine solution; keep the temperature at 65°C, then add 96g TKX-50 to the nitroguanidine solution obtained above, and stir to make it evenly suspended under the stirring condition of rotating speed 225r / min; Under the stirring condition of 80r / min, raise the temperature of the obtained suspension to 80°C, keep the temperature for 25min, then rapidly cool down to 55°C within 4 minutes; speed, continue to slowly cool the above-mentioned suspension to 15°C, and let it stand for 35min until the crystals are completely precipitated from the solution; filter, wash, and dry at a vacuum of 0.04MPa and a temperature of 20°C for 6h; obtain nitroguanidine insensitive After the TKX-50.

[0024] Obtain the TKX-50 white powder product 99.4g after the ni...

Embodiment 3

[0026] A method of passivating TKX-50 using nitroguanidine as a desensitizing agent. At 65°C with a stirring speed of 200r / min, add 6g of nitroguanidine to 240g of distilled water and stir for 20min to form a uniform mass fraction of 2.44 % nitroguanidine solution; keep the temperature at 65°C, then add 94g TKX-50 to the nitroguanidine solution obtained above, and stir to make it evenly suspended under the stirring condition of rotating speed 250r / min; Under the stirring condition of 90r / min, raise the temperature of the obtained suspension to 85°C, keep the temperature for 20min, then rapidly cool down to 65°C within 2 minutes; Speed, continue to slowly cool the above suspension to 20°C, and let it stand for 25min until the crystals are completely precipitated from the solution; filter, wash, and dry at a vacuum of 0.04MPa and a temperature of 15°C for 10h; obtain nitroguanidine insensitivity After the TKX-50.

[0027] Obtain 99.3g of TKX-50 white powder product after nitrog...

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Abstract

The invention relates to a method for passivating 1,1'-dihydroxy-5,5'-tetrazolium dihydroxylamine salt TKX-50 by taking nitroguanidine as a desensitizing agent, and belongs to the field of an energetic material. According to the method, a recrystallization principle is utilized, recrystallization coating is conducted according to a nitroguanidine solution suspending TKX-50 method, the surface of the TKX-50 explosive is coated with the insensitive nitroguanidine explosive according to the solution recrystallization method, and the energetic crystal coated surface form is improved by controllingthe nucleation and growth process of the energetic crystal, so that the explosion property of the TKX-50 is maintained, the mechanical sensitiveness is reduced, the mechanical sensitiveness is reduced best, the obtained product has low friction and shock sensitivity, and the energy level of the product is not influenced. The process method is not reported in the field of explosive desensitization, and passivation of the TKX-50 is the first of high-energy mixed explosive.

Description

technical field [0001] The invention relates to a method for passivating 1,1'-dihydroxy-5,5'-tetrazole dihydroxylamine salt (TKX-50) by using nitroguanidine as a desensitizing agent, and belongs to the field of energetic materials. Background technique [0002] In engineering practice, while people need high-sensitivity explosives, they also hope that the explosives have low-sensitivity characteristics. That is to say, it is hoped that explosives have high sensitivity when used to ensure the reliability of detonation and transmission; while in informal occasions such as production, storage, and transportation, explosives are expected to have low sensitivity to ensure safety. High-efficiency damage and precise strikes have continuously increased the technical requirements for explosives and propellants. Modern weapon systems require energetic materials to have high energy density and high safety. TKX-50 is a new type of cage-shaped high-energy explosive. It is a white crysta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B23/00C06B21/00
CPCC06B21/0083C06B23/005
Inventor 刘吉平刘莉莉刘晓波
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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