Composite oxidant for fireworks and crackers and preparation method thereof

A kind of fireworks and firecrackers, composite technology, applied in the direction of alkali metal composition, explosives, etc., can solve the problems of high price, inability to promote, poor discharge effect, slow oxygen release speed, etc., to achieve increased pyrotechnic effect, low cost, hygroscopicity small effect

Inactive Publication Date: 2008-01-09
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, because the thermal decomposition process of potassium perchlorate is an endothermic reaction, the required temperature during decomposition is higher, and the oxygen release rate is slower, then only use potassium perchlorate instead of potassium chlorate as the firework and firecracker product setting off effect of oxidant then relatively poor, and The cost is also higher
Someone once also successfully developed a safe firecracker medicinal oxidant without potassium chlorate, that is, potassium perchlorate and barium nitrate were used instead of the previously used potassium perchlorate.
Therefore, it is relatively ideal to look for an oxidizing agent or composite oxidizing agent with a lower price when it is used for fireworks and firecrackers. Comparable oxidants or compound oxidants whose safety performance is significantly better than potassium chlorate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation method of composite oxidant

[0020] 1) Drying: Potassium perchlorate, potassium nitrate and cerium oxide are dried in an ordinary water-bath oven at 40°C for 8 hours;

[0021] 2) Sieving: obtain potassium perchlorate, potassium nitrate and cerium oxide above 120 mesh;

[0022] 3) Mixing: Mix the potassium perchlorate, potassium nitrate and cerium oxide obtained by sieving according to the mass percentage of 65.3:29.7:5. When mixing, use an ordinary mixer. First put the potassium perchlorate into the mixer, turn on the mixer, and slowly Add potassium nitrate and mix for 20 minutes, then slowly put cerium oxide into the mixer and mix for 30 minutes to obtain a composite oxidant.

[0023] (2) Composite oxidant, S, Al are mixed by mass percentage 60.2:18.4:21.4;

[0024] (3) Discharge result: the sound loudness is 116.91dB;

[0025] (3) Safety performance, the impact sensitivity is 36%, and the friction sensitivity is 12%;

[0026] (4) The production co...

Embodiment 2

[0028] (1) Preparation method of composite oxidant

[0029] 1) Drying: Potassium perchlorate, potassium nitrate and cerium oxide are dried in an ordinary water-bath oven at 50°C for 5 hours;

[0030] 2) Sieving: obtain potassium perchlorate, potassium nitrate and cerium oxide above 100 mesh;

[0031] 3) Mixing: Mix the potassium perchlorate, potassium nitrate and cerium oxide obtained by sieving according to the mass percentage of 64.7:29.4:5.9. When mixing, use an ordinary mixer, first put the potassium perchlorate into the mixer, turn on the mixer, and slowly Add potassium nitrate and mix for 30 minutes, then slowly put cerium oxide into the mixer and mix for 20 minutes to obtain a composite oxidant.

[0032] (2) Composite oxidant, S, Al are mixed by mass percentage 60.2:18.4:21.4;

[0033] (3) Discharge result: the sound loudness is 116.47dB;

[0034] (3) Safety performance, the impact sensitivity is 36%, and the friction sensitivity is 12%;

[0035] (4) The production ...

Embodiment 3

[0037] (1) Preparation method of composite oxidant

[0038] 1) Drying: Potassium perchlorate, potassium nitrate and cerium oxide are dried in an ordinary water-bath oven at 43°C for 7 hours;

[0039] 2) Sieving: obtain potassium perchlorate, potassium nitrate and cerium oxide above 100 mesh;

[0040] 3) Mixing: Mix the potassium perchlorate, potassium nitrate and cerium oxide obtained by screening according to the mass percentage of 63.1:31.5:5.4. When mixing, use an ordinary mixer. First put the potassium perchlorate into the mixer, turn on the mixer, and slowly Add potassium nitrate and mix for 25 minutes, then slowly put cerium oxide into the mixer and mix for 25 minutes to obtain a composite oxidant.

[0041] (2) Composite oxidant, S, Al are mixed by mass percentage 60.2:18.4:21.4;

[0042] (3) Discharge result: the sound loudness is 115.63dB;

[0043] (3) Safety performance, the impact sensitivity is 36%, and the friction sensitivity is 12%;

[0044] (4) The productio...

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PUM

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Abstract

A composite oxidant for firework and its production are disclosed. The composite oxidant consists of potassium perchlorate 63-68 wt%, potassium nitrate 29-34 wt% and cerium oxide 3-8 wt%. The process is carried out by drying to make water content less than 0.5%, screening and mixing to obtain final product. It's simple, safe and convenient and has less accessibility and better firework effect.

Description

a technical field [0001] The invention belongs to an oxidizing agent for fireworks and firecrackers, in particular to a composite oxidizing agent for fireworks and firecrackers and a preparation method thereof. Two background technology [0002] At present, potassium chlorate is the most commonly used oxidant in the production of fireworks and firecrackers. It is a strong oxidant. Its thermal decomposition process is an exothermic reaction with low decomposition temperature and good flammability. Therefore, fireworks and firecrackers using potassium chlorate as an oxidant have a better discharge effect, but after the mixed agent composed of potassium chlorate and sulfur or sulfide is put into use, not only the incidence of accidents increases, but also the destructive power of accidents is also greatly increased. Increase. In order to improve the safety during the production, storage and use of fireworks and firecrackers, it has become the direction pursued by researchers i...

Claims

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Application Information

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IPC IPC(8): C06B31/02C06B29/06
Inventor 刘玉海江屈强林雪梅
Owner NANJING UNIV OF SCI & TECH
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