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Passivation method for nickel hydrazine nitrate

A nickel hydrazine nitrate and a certain amount of technology are used in explosives processing equipment, attack equipment, explosives, etc., and can solve the problems of introducing impurities into nickel hydrazine nitrate particles, narrow application range of the method, and reducing the coating agent, so as to broaden the scope of use, The effect of low cost and improved safety

Active Publication Date: 2019-02-01
DANCING FIREWORKS GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the steps of first emulsification and then demulsification in this method are relatively complicated. Not only does the coating reagent have an emulsifying effect, but also the demulsification and precipitation process needs fine control, which leads to a greatly reduced choice of coating agent, and the method has a narrow scope of application. Nickel hydrazine particles failed to achieve good coating during the complex demulsification and precipitation process. The addition of demulsifiers caused the coated nickel hydrazine nitrate particles to introduce impurities, and part of the coating agent remained in the solution, resulting in increased costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) A certain amount of paraffin is placed in ethyl acetate, and stirred ultrasonically at a constant temperature at 65°C until the paraffin is completely dissolved to obtain a 15wt% paraffin ethyl acetate solution;

[0018] (2) Weigh 5 g of nickel hydrazine nitrate powder and slowly add it to 25 mL of the coating agent solution, and stir at a constant temperature of 65 ° C for 1 h to obtain a mixed solution;

[0019] (3) The mixed solution was placed in a one-necked flask, and the solvent was removed by vacuum rotary distillation at 45° C. until no fraction was distilled out to obtain paraffin-coated nickel hydrazine nitrate.

Embodiment 2

[0021] (1) A certain amount of graphite and phenolic resin are placed in alcohol, the mass ratio of phenolic resin to graphite is 2:8, and ultrasonically stirred at a constant temperature at 30°C until the graphite is completely dispersed to obtain an alcohol dispersion of 15wt% graphite;

[0022] (2) Weigh 5g of nickel hydrazine nitrate powder and slowly add it to 25mL of coating agent dispersion, and stir at 30°C for 1 hour to obtain a mixed solution;

[0023] (3) The mixed solution was placed in a single-necked flask, and the solvent was removed by vacuum rotary distillation at 30° C. until no fraction was distilled out to obtain graphite-coated nickel hydrazine nitrate.

Embodiment 3

[0025] (1) A certain amount of sodium stearate is placed in distilled water, and stirred ultrasonically at a constant temperature at 45°C until the sodium stearate is completely dissolved to obtain a distilled aqueous solution of 15wt% sodium stearate;

[0026] (2) Weigh 5 g of nickel hydrazine nitrate powder and slowly add it to 25 mL of the coating agent solution, and stir at a constant temperature of 45 ° C for 1 h to obtain a mixed solution;

[0027] (3) The mixed solution was placed in a single-necked flask, and the solvent was removed by vacuum rotary distillation at 60° C. until no fraction was distilled out to obtain nickel hydrazine nitrate coated with sodium stearate.

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PUM

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Abstract

The invention discloses a passivation method for nickel hydrazine nitrate. The method includes: placing a coating agent in a solvent and conducting stirring to obtain a coating agent solution or dispersion liquid; weighing nickel hydrazine nitrate powder and adding the weighed powder into the coating agent solution or dispersion liquid slowly to obtain a mixed solution; putting the mixed solutionin a single-mouth flask, carrying out vacuum rotary distillation at certain temperature to remove the solvent until no fraction is distilled out, thus obtaining coated nickel hydrazine nitrate. The passivation way adopted by the invention has a wide application range and good coating effect, broadens the application scope of the coating agent, is convenient for screening of the coating agent, andis simple in operation and low in cost, thus being suitable for large-scale production.

Description

technical field [0001] The application relates to a passivation method of pyrotechnic powder, in particular to a passivation method of nickel hydrazine nitrate. Background technique [0002] Nickel hydrazine nitrate belongs to a complex primary explosive, which has the characteristics of simple production process, good product performance and stable quality. However, its detonation pressure is usually less than 80MPa, which indicates that the nickel hydrazine nitrate sample has high sensitivity, and it is easy to burn or explode during its preparation, storage, transportation, etc., and has a high safety hazard, so it needs to be passivated. [0003] Patent CN88101549A discloses a passivation method of nickel hydrazine nitrate, which uses graphite colloid and nickel hydrazine nitrate to disperse, and reduces the friction between nickel hydrazine nitrate through the lubricating properties of graphite, thereby playing a passivation role. However, the graphite particles are ...

Claims

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Application Information

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IPC IPC(8): C06B45/32C06B45/30C06B21/00C06B31/00
CPCC06B21/0083C06B31/00C06B45/30C06B45/32
Inventor 杨传观蔡波李跃明
Owner DANCING FIREWORKS GROUP CO LTD
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