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Potassium azotetrazole and its preparation method and use

A kind of technology of potassium azotetrazole and compound, which is applied in the field of energy-containing flame suppressant—potassium azotetrazolium and its preparation, which can solve the problems of lower combustion temperature, high hygroscopicity, low energy, etc., and achieve good flame suppression Effect, reduced flame area, simple preparation process

Inactive Publication Date: 2017-04-19
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a potassium azotetrazole compound with high energy, low carbon content, and good flame extinguishing effect in view of the shortcomings of the existing standard flame extinguishing agent, such as high hygroscopicity and low energy. its preparation method
[0005] The train of thought of the present invention is based on that azotetrazole compounds have the characteristics of high nitrogen and low carbon, clean gas, and low combustion temperature. Using the acidity of azotetrazole, potassium ions are introduced into azotetrazole potassium salt to solve the problem of formula potassium The problem of high hygroscopicity of salt, when used in propellants, it can not only play a flame-extinguishing role, but also reduce the combustion temperature

Method used

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  • Potassium azotetrazole and its preparation method and use
  • Potassium azotetrazole and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Potassium hydroxide (224g, 4mol) and 2l of water were added to a 3l four-necked flask equipped with a thermometer, a condensing reflux device and a stirrer, then 5-aminotetrazole (100g, 1.2mol) was added, and heated to a temperature of 60°C When , potassium permanganate (190 g, 1.2 mol) was added, and after the addition was completed, the reaction was carried out for 20 minutes. Add absolute ethanol to reduce excess potassium permanganate, raise the temperature to 95°C, and react for 30 minutes. Filtrate hot, wash the filter cake with hot water, combine the filtrate and washings, concentrate under reduced pressure to a volume of about 1 l, freeze to precipitate crystals, and filter to obtain 140.2 g of an orange-yellow crystalline solid, with a yield of 78.9%.

[0019] Structural identification: IR, ν max (cm -1 ): 3396(N-H), 1652(C=N), 1615(-N=N), 1391, 1189, 1155, 1039(C-N), 729 (tetrazole ring skeleton vibration).

[0020] Elemental Analysis C 2 N 10 K 2 ·3H 2...

Embodiment 2

[0024] Potassium hydroxide (280g, 5mol) and 2l of water were added to a 3l four-neck flask equipped with a thermometer, a condensing reflux device and a stirrer, then 5-aminotetrazole (100g, 1.2mol) was added, and heated to a temperature of 60°C , add potassium permanganate (95 g, 0.6 mol), and react for 20 minutes after the addition is complete. Add absolute ethanol to reduce excess potassium permanganate, raise the temperature to 95°C, and react for 30 minutes. Filtrate hot, wash the filter cake with hot water, combine the filtrate and washings, concentrate under reduced pressure to a volume of about 1 l, freeze to precipitate crystals, and filter to obtain 74.8 g of an orange-yellow crystalline solid, with a yield of 42.1%.

Embodiment 3

[0026] Potassium hydroxide (336g, 6mol) and 2l of water were added to a 3l four-neck flask equipped with a thermometer, condensing reflux device and stirrer, then 5-aminotetrazole (100g, 1.2mol) was added and heated to a temperature of 60°C When , potassium permanganate (316g, 2mol) was added, and after the addition was complete, the reaction was carried out for 20 minutes. Add absolute ethanol to reduce excess potassium permanganate, raise the temperature to 95°C, and react for 30 minutes. Filtrate hot, wash the filter cake with hot water, combine the filtrate and washings, concentrate under reduced pressure to a volume of about 1 l, freeze to precipitate crystals, and filter to obtain 115.6 g of an orange-yellow crystalline solid, with a yield of 56.3%.

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Abstract

The invention discloses an organic energetic potassium salt and a preparation method thereof, belonging to the technical field of energetic materials. Its molecular structural formula is as follows: it includes the following steps: adding potassium hydroxide to water, then adding 5-aminotetrazole, raising the temperature, adding potassium permanganate, and raising the temperature to boiling after the addition is completed. After the reaction, hot filter, wash the filter cake with hot water, combine the filtrate and washing liquid, concentrate under reduced pressure, and freeze to precipitate crystals to obtain potassium salt of azotetrazole. The potassium azotetrazole synthesized by the invention has a good flame-extinguishing effect and can be used to suppress the muzzle flame of barrel weapons.

Description

technical field [0001] The invention belongs to the technical field of energetic materials, and in particular relates to an energetic flame suppressant-potassium azotetrazolium and its preparation method and application. Background technique [0002] During the shooting process of the barrel weapon system, the high-temperature gas quickly overflows with the launch of the projectile, and mixes with the air at the muzzle, producing a large amount of smoke and flames, making TV tracking, infrared tracking, laser ranging, laser guidance, etc. The aiming and sighting guidance equipment blinds instantly, the image is blurred, and the target cannot be tracked; at the same time, it also has a great impact on the direct vision system of the human eye. The muzzle flame generally refers to the secondary flame. It is generally believed that the secondary flame is more harmful. The secondary flame is large in size and high in intensity, and will generate huge muzzle noise. [0003] In o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D257/06
Inventor 陈斌王琼林姬月萍刘卫孝汪营磊高福磊魏伦刘少武
Owner XIAN MODERN CHEM RES INST
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