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A method of nitroguanidine fluidized spray granulation coating TKX-50

A technology of TKX-50 and spray granulation, applied in non-explosive desensitizers/passivators, explosives, offensive equipment, etc., can solve the problems of unreported literature, low mechanical sensitivity, etc., and achieve low friction and impact sensitivity , good pressing formability, safe and reliable operation

Active Publication Date: 2020-09-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nitroguanidine (NQ) is a white needle-like crystal with an extremely low mechanical sensitivity of 0%, which 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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] At 70°C, at a stirring speed of 300r / min, add 5g of polyvinyl butyral to 800g of ethyl acetate, keep the temperature constant, stir to dissolve it completely, and obtain a liquid glue with a mass fraction of 0.62%; ℃, under the condition of stirring speed of 200r / min, add 50g of nitroguanidine into the above-mentioned liquid glue, stir to make it dissolve completely, and obtain the liquid glue containing nitroguanidine; Purpose 945g TKX-50 is added to the fluidized bed granulation device, after continuous mixing for 40 minutes, the liquid glue containing nitroguanidine is sprayed into the fluidized layer of the fluidized bed granulation device, and after 50 minutes of mixing and granulation, the At a temperature of 40°C, dry in a fluidized bed granulation device for 4 hours, and sieve through a 200-mesh sieve to obtain TKX-50 coated with nitroguanidine granulation;

[0023] Obtain 991g of TKX-50 white granule product after nitroguanidine granulation coating, productive ...

Embodiment 2

[0025] At a temperature of 55°C and a stirring speed of 200r / min, add 0.6g of polymethyl acrylate to 80g of ethanol, keep the temperature constant, stir to dissolve it completely, and obtain a liquid glue with a mass fraction of 0.74%; at 45°C, Under the condition of stirring speed of 180r / min, add 5g of nitroguanidine into 80g of liquid gel, stir to dissolve it completely, and obtain the liquid gel containing nitroguanidine; -50 was added to the fluidized bed granulation device, and after continuous mixing for 35 minutes, the liquid glue containing nitroguanidine was sprayed into the fluidized layer of the fluidized bed granulation device, and after mixing and granulation for 40 minutes, the mixture was mixed at a temperature of 50 Under the condition of ℃, dry in a fluidized bed granulation device for 2 hours, and sieve through a 230-mesh sieve to obtain TKX-50 coated with nitroguanidine granulation;

[0026] Obtain 99.4g of the TKX-50 white granule product after nitroguanid...

Embodiment 3

[0028] At a temperature of 60°C and a stirring speed of 190r / min, add 0.5g of polyacrylic acid to 75g of ethanol, keep the temperature constant, stir to dissolve it completely, and obtain a liquid glue with a mass fraction of 0.66%; at 40°C, 180r / min Under the condition of stirring speed, add 5.5g of nitroguanidine into 75g of liquid glue, stir to make it completely dissolve, and obtain the liquid glue containing nitroguanidine; 50 and joined in the fluidized bed granulation device, after continuous mixing for 35min, the liquid glue containing nitroguanidine was sprayed into the fluidized layer of the fluidized bed granulation device, after mixing and granulation for 40min, at a temperature of 15 Under the condition of ℃, dry in a fluidized bed granulation device for 8 hours, and sieve through a 200-mesh sieve to obtain TKX-50 coated with nitroguanidine granulation;

[0029] Obtain 99.3g of the TKX-50 white granule product after nitroguanidine granulation and coating, the prod...

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Abstract

The invention relates to a method for coating TKX-50 with nitroguanidine through fluidized spraying granulation, and belongs to the field of energetic materials. The method comprises the following steps: adding polyvinyl butyral into ethyl acetate, keeping the temperature constant, and stirring for completely dissolving the polyvinyl butyral to obtain liquid glue; at 50 DEG C, adding the nitroguanidine into the liquid glue, and stirring for completely dissolving the nitroguanidine to obtain nitroguanidine-containing liquid glue; at the temperature of 35 DEG C, adding the TKX-50 into a fluidized bed granulating device, continuously mixing for 40 minutes, then spraying the nitroguanidine-containing liquid glue into a fluidized layer of the fluidized bed granulating device, performing mixed granulating, then drying in the fluidized bed granulating device at the temperature of 40 DEG C, and sieving to obtain the TKX-50 granulated and coated with the nitroguanidine. With the method, a preparation technology is simple, a high-temperature pressure boosting and reducing device is not used in a preparation process, and a used solvent can be recycled; the product yield is relatively high, the yield of the TKX-50 prepared after fluidized spraying granulation is 99-99.99%, and the obtained particles have the advantages of uniform particle size and good fluidity and pressing formability.

Description

technical field [0001] The invention relates to a method for coating TKX-50 by fluidized spray granulation of nitroguanidine, which belongs to the field of energetic materials. Background technique [0002] High-efficiency damage requires continuous improvement of the power performance of explosives. Modern weapon systems require energetic materials to have the characteristics of high energy density, low vulnerability and high safety. 1,1'-dihydroxy-5,5'-tetrazole dihydroxylamine salt (hereinafter referred to as TKX-50) is a new type of high-energy elemental explosive, which is a white crystalline granular high-energy, low-sensitivity tetrazole energetic ion Salt is a new type of energetic material that has emerged in recent years. Due to its high energy, it has attracted extensive attention in the application field. There are basically no mixed explosives with TKX-50 found in many mixed explosive literatures, and the literature on the optimization of the synthesis process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B21/00C06B23/00C06B45/22
CPCC06B21/0066C06B21/0083C06B23/005C06B45/22
Inventor 刘吉平刘莉莉刘晓波
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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