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Composite oxidant used for fireworks and crackers and preparation method thereof

A composite oxidant, fireworks and firecracker technology, applied in the direction of explosives, etc., can solve the problems of difficult ignition, high price and high reaction temperature

Inactive Publication Date: 2009-12-09
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potassium nitrate has the advantages of low price, rich oxygen content, low reaction temperature, and easy ignition. However, industrial-grade products have the disadvantage of moisture absorption, which limits their application in fireworks and firecrackers.
Potassium perchlorate has the advantages of rich oxygen content and rapid oxygen release, but its reaction temperature is high, it is difficult to ignite, and the price is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Dissolve 1.7 g of potassium perchlorate and 0.21 g of ammonium perchlorate in 50 mL of deionized water, heat to 80° C. to dissolve all the solutes, and form a mixed solution of potassium perchlorate and ammonium perchlorate.

[0021] (2) 0.07 g of iron oxide was added to the mixed solution of (1). Stir at 80°C until the water evaporates completely. A mixture of potassium perchlorate and ammonium perchlorate was crystallized on iron oxide during evaporation, and the crystals were ground and passed through a 200-mesh sieve.

[0022] (3) Add 1.0 g of potassium nitrate and 0.04 g of copper oxide passed through a 200-mesh sieve to the crystal prepared in (2), and mix well.

[0023] (4) Add 2.5 g of the crystals prepared in (3) into 10 mL of 0.25 g / L polyvinyl butyral in chloroform, heat in a water bath to 50° C., and stir for 20 min while wetting. Add 20 mL of precipitating agent n-hexane dropwise at a constant speed of 2 mL / min, so that the polyvinyl butyral in the so...

Embodiment 2

[0027] (1) Dissolve 1.7 g of potassium perchlorate and 0.24 g of ammonium perchlorate in 50 mL of deionized water, heat to 80° C. to dissolve all the solutes, and form a mixed solution of potassium perchlorate and ammonium perchlorate.

[0028] (2) 0.1 g of iron oxide was added to the mixed solution of (1). Stir at 80°C until the water evaporates completely. Potassium perchlorate and ammonium perchlorate were crystallized on iron oxide during evaporation, and the crystals were ground and passed through a 200-mesh sieve.

[0029] (3) Add 0.9 g of potassium nitrate and 0.1 g of copper oxide passed through a 200-mesh sieve to the crystal prepared in (2), and mix well.

[0030] (4) Add 2.5 g of the crystals prepared in (3) into 10 mL of 0.25 g / L polyvinyl butyral in chloroform, heat in a water bath to 50° C., and stir for 20 min while wetting. Add 20 mL of precipitating agent n-hexane dropwise at a constant speed of 2 mL / min, so that the polyvinyl butyral in the solution precipi...

Embodiment 3

[0034] (1) Dissolve 1.8 g of potassium perchlorate and 0.15 g of ammonium perchlorate in 50 mL of deionized water, heat to 80° C. to dissolve all the solutes, and form a mixed solution of potassium perchlorate and ammonium perchlorate.

[0035] (2) 0.04 g of iron oxide was added to the mixed solution of (1). Stir at 80°C until the water evaporates completely. Potassium perchlorate and ammonium perchlorate were crystallized on iron oxide during evaporation, and the crystals were ground and passed through a 200-mesh sieve.

[0036] (3) Add 1.4 g of potassium nitrate and 0.12 g of copper oxide passed through a 200-mesh sieve to the crystal prepared in (2), and mix well.

[0037] (4) Add 2.5 g of the crystals prepared in (3) into 10 mL of 0.25 g / L polyvinyl butyral in chloroform, heat in a water bath to 50° C., and stir for 20 min while wetting. Add 20 mL of precipitating agent n-hexane dropwise at a constant speed of 2 mL / min, so that the polyvinyl butyral in the solution preci...

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PUM

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Abstract

The invention relates to a composite oxidant used for fireworks and crackers and a preparation method thereof, belonging to the field of fireworks and crackers. The composite oxidant used for fireworks and crackers comprises the following components in a certain mass ratio: potassium perchlorate, potassium nitrate, ammonium perchlorate, polyvinyl butyral and catalysts. The composite oxidant is obtained by the following steps: carrying out the evaporation crystallization on the components of the composite oxidant respectively; grinding and mixing the components and precipitating a layer of polyvinyl butyral outside the mixed components. The crackers are obtained by preparing the composite oxidant, sulfur, aluminum powder and perlite powder into a pyrotechnic composition. By testing, the mechanical sensitivity, hygroscopicity and cracker sound level of the pyrotechnic composition conform to the national standards.

Description

technical field [0001] The invention relates to a composite oxidant for fireworks and a preparation method thereof, belonging to the field of fireworks and firecrackers. Background technique [0002] Potassium chlorate is an important raw material in fireworks and other pyrotechnic agents. Potassium chlorate is a strong oxidizing agent. Zhuo Nan and other scholars pointed out in their article "Development of Modified Potassium Chlorate" that potassium chlorate has the characteristics of low decomposition temperature, low hygroscopicity, good explosive performance, good storage stability, simple production process, and low cost. Firecrackers produced with potassium chlorate as the oxidant have a good discharge effect, and their sound level has reached the requirements of the national standard. In addition to ensuring a certain discharge performance, an important safety index of pyrotechnic agents is mechanical sensitivity (including friction sensitivity and impact sensitivi...

Claims

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Application Information

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IPC IPC(8): C06B33/14
Inventor 钱新明邓楠刘振翼魏思凡黄平
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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