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A method of changing the decomposition process of ammonium perchlorate to eliminate the peculiar smell of cold light fireworks

A technology of ammonium perchlorate and cold light fireworks, which is applied in ammonium perchlorate composition, non-explosive/non-thermal agent components, explosives, etc., can solve the harm of polluted human body and the respiratory tract of personnel on the discharge site without eliminating odor components. Injury, endanger human health and other problems, to achieve the effect of increasing ornamental and affinity, eliminating odorous gas products, and eliminating peculiar smells

Inactive Publication Date: 2016-03-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Because the by-products produced during the decomposition of ammonium perchlorate contain NH 3 (g), Cl 2 (g) and HCl(g), forming obvious throat-piercing, pungent and uncomfortable odors in the air, seriously polluting the environment, endangering human health, and restricting the development and use of this product
At present, there are methods for eliminating peculiar smell: Zhang Youshan covers and weakens the peculiar smell of luminescent fireworks by adding fragrance components to cover up and weaken the peculiar smell of cold light fireworks. In the case of a small amount of discharge, although there is a certain effect of covering peculiar smell, the peculiar smell component still exists, although it is not smellable perception, but will still cause respiratory damage to the personnel at the scene of setting off, and cause pollution to the environment. In addition, the neutralization effect of the alkali in the solid phase component and the generated HCl gas is also very limited (Zhang Youshan, "A luminescent fireworks deodorant Production method”, China, 200810030448.2(2009))
[0005] The above method does not fundamentally eliminate the odorous components produced when the cold light fireworks are set off, but only plays a role in covering the odor, the effect is very limited, and it does not eliminate the pollution of the odorous components to the environment and the damage to the human body, and the addition of too many inert components It will also affect the viewing effect when burning

Method used

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  • A method of changing the decomposition process of ammonium perchlorate to eliminate the peculiar smell of cold light fireworks
  • A method of changing the decomposition process of ammonium perchlorate to eliminate the peculiar smell of cold light fireworks
  • A method of changing the decomposition process of ammonium perchlorate to eliminate the peculiar smell of cold light fireworks

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: Accurately take by weighing 2 grams of nano-Ni powder and 100 grams of ammonium perchlorate after being crushed to 500 mesh, fully mix the two, then spray water to fully moisten, sieve and granulate with 80 mesh screen, and dry , made of 80-mesh composite particles.

[0026] Accurately weigh 1.57 mg of the above-mentioned composite particles, place it in a DSC-823e differential scanning calorimeter, and set the heating rate at 20°C / min, N 2 Under the condition of atmosphere and gas flow rate of 20mL / min, the temperature was raised from 50°C to 500°C. The measured pyrolysis temperature was 25°C lower than that of pure ammonium perchlorate, and the apparent decomposition heat increased by 450J / g. It shows that the nano-Ni powder changed the thermal decomposition process of ammonium perchlorate.

[0027] The prepared composite particle is used as an oxidant, and according to the conventional luminescent fireworks production process, the composite particle, n...

Embodiment 2

[0028] Embodiment 2: Accurately weigh 2 grams of nano Cu powder and 100 grams of ammonium perchlorate after crushing to 500 mesh, fully mix the two, then spray water to fully moisten, sieve and granulate with 80 mesh screen, and dry , made of 80-mesh composite particles.

[0029] Accurately weigh 1.57 mg of the above-mentioned composite particles, place it in a DSC-823e differential scanning calorimeter, and set the heating rate at 20°C / min, N 2 Under the condition of atmosphere and gas flow rate of 20mL / min, the temperature was raised from 50°C to 500°C. The measured pyrolysis temperature was 50°C lower than that of pure ammonium perchlorate, and the apparent decomposition heat increased by 480J / g. It shows that the nano-Cu powder changed the thermal decomposition process of ammonium perchlorate.

[0030] The prepared composite particle is used as an oxidant, and according to the conventional luminescent fireworks production process, the composite particle, nitrocellulose, a...

Embodiment 3

[0031] Embodiment 3: Accurately take by weighing nanometer Fe 2 o 3 3 grams of powder and 100 grams of ammonium perchlorate crushed to 500 mesh, the two are fully mixed, then sprayed with water to fully moisten, granulated with a 100 mesh sieve, and dried to make 100 mesh composite particles.

[0032] Accurately weigh 1.57 mg of the above-mentioned composite particles, place it in a DSC-823e differential scanning calorimeter, and set the heating rate at 20°C / min, N 2 Under the condition of atmosphere and gas flow rate of 20mL / min, the temperature was raised from 50°C to 500°C. The measured pyrolysis temperature was 55°C lower than that of pure ammonium perchlorate, and the apparent decomposition heat increased by 570J / g. Nano-Fe 2 o 3Powder changed the thermal decomposition process of ammonium perchlorate.

[0033] The prepared composite particle is used as an oxidant, and according to the conventional luminescent fireworks production process, the composite particle, nitro...

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Abstract

The invention discloses a method for changing a decomposition process of ammonium perchlorate to remove a peculiar smell during setting off of a cold light firework. According to the method, one substance selected from a transition metal (such as Ni and Cu), a transition metal oxide (such as Fe2O3, Co2O3, NiO and CuO) and a transition metal composite oxide (such as MnFe2O4 and CoCr2O4) is used as a functional additive, 2-5% (mass percentage) of the functional additive is mixed with the ammonium perchlorate which is crushed to 500 mesh, the mixture is fully wetted by water spraying, a sieve of 80-120 mesh is used for sieving and granulation, and then a composite particle comprising the functional additive and the ammonium perchlorate is prepared by drying. The composite particle as an oxidizing agent is used with components such as nitrocotton, titanium powder and the like to prepare the cold light firework according to a conventional formula and production technology of the cold light firework. When the cold light firework is set off, no peculiar smell may be smelt by a nose, no peculiar smell component may be detected by an infrared remote sensing spectrometer, the peculiar smell during setting off of the cold light firework can be thoroughly removed, and the principle of removing of the peculiar smell is that the functional additive changes the decomposition process of the ammonium perchlorate.

Description

technical field [0001] The invention relates to the field of luminescent fireworks, in particular to a method for changing the decomposition process of ammonium perchlorate to eliminate the peculiar smell of luminescent fireworks. Background technique [0002] Cold light fireworks, also known as indoor fireworks, are a new type of civilian entertainment pyrotechnic products developed in recent years. They are high-end products among various fireworks products, with high technical content, good safety, and strong ornamental value. They are suitable for more Occasion discharge and other characteristics, the market prospect is very broad. [0003] The formula components of cold light fireworks generally include oxidizing agent (ammonium perchlorate), combustible agent (nitrocellulose), metal powder (titanium powder), etc. Combustion reaction with combustible agent, release more heat, and generate a large amount of gas at the same time, act on the metal powder component in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B29/22C06B23/00
Inventor 韩爱军叶明泉陈昕
Owner NANJING UNIV OF SCI & TECH