Propellant for oxygen candles and its manufacturing process.

专利摘要:
The present application provides a propellant for oxygen candles and its manufacturing process. The blowing agent consists of 70 to 90 parts by weight of barium chromate, 5 to 15 parts by weight of metal element, 3 to 10 parts by weight of binder and at most chlorate by weight, wherein the metal element is one or a mixture of two or more of magnesium powder, aluminum powder, titanium powder and iron powder, and wherein the Binder is one or a mixture of two or more of kaolin, kieselguhr and ceramic clay. The manufacturing process involves: pressing a formula amount of barium chromate, metal element, binder and chlorate.
公开号:CH715622B1
申请号:CH00786/20
申请日:2018-10-25
公开日:2022-01-14
发明作者:Ma Aiping
申请人:Shaanxi Star Explosion Safety Polytron Tech Inc Liping Xu；
IPC主号:

专利说明:

TECHNICAL AREA
The present application relates to oxygen candle technology, in particular to a propellant for oxygen candles.
STATE OF THE ART
At present, zirconium powder is generally used as the main raw material for the blowing agent in the solid oxygen generator in China. For oxidizers, barium nitrate or barium peroxide is used. Due to the composition limitations, it has some defects such as unstable ignition performance. At the same time, the oxidizing agent barium nitrate is easy to absorb moisture and deteriorate, barium peroxide is easy to decompose. Such phenomena lead to the fact that the product cannot be stored for a long time.
DISCLOSURE OF THE INVENTION
In view of the shortcomings of the prior art, the object of the present invention is to provide a propellant for oxygen candles.
The propellant for oxygen candles provided by the present invention consists of 70 to 90 parts by mass of barium chromate, 5 to 15 parts by mass of metal element, 3 to 10 parts by mass of binder and 0 to 5 parts by mass of chlorate.
The metal element of the present invention is one or a mixture of two or more of magnesium powder, aluminum powder, titanium powder and iron powder;
The binder of the present invention is one or a mixture of two or more of kaolin, kieselguhr and ceramic clay;
The chlorate of the present invention is one or a mixture of sodium chlorate and potassium chlorate.
The present invention also provides a manufacturing method of the propellant for oxygen candles. The manufacturing process provided includes: pressing and preparing a formula quantity of barium chromate, metal element, binder and chlorate. Furthermore, the pressing pressure is 0.15 to 0.25 T/cm 2 .
The advantageous effects of the present invention: 1. In the present invention, magnesium powder or aluminum powder is used instead of zirconium powder. Magnesium oxide on the surface of magnesium powder is a catalyst for chlorate decomposition, which lowers the decomposition temperature and burns quickly to absorb the harmful gas nitrogen oxide generated by the trigger fire cap, with the combustion residues being loose and not expanding, and thus safe and are reliable. 2. The barium chromate powder added in the present invention is a flame retardant, which is beneficial for the smooth burning of the propellant without explosion. 3. Assuming the same amount of heat generation, the prior art igniter needs 2 to 3 grams, and the ignition time is about 7 seconds. The solid oxygen-generating propellant of the present invention is easy to ignite, has good sensitivity performance, and the required amount is from 0.5 to 0.6 grams, and the ignition time is about 2 seconds. 4. The raw materials for the solid oxygen-generating blowing agent of the present invention are easily available and low in toxicity. 5. The solid oxygen generating blowing agent of the present invention is easy to manufacture and process.
EMBODIMENTS OF THE INVENTION
Example 1:
[Table 0001]
Barium chromate BaCrO4 powder 80 Magnesium powder Mg superfine powder 10 Kaolin Al2O3 2SiO2 2H2O powder 5 Sodium chlorate NaClO3 powder 5
Experimental result:
The developed solid oxygen-generating propellant is easy to ignite, the reaction is stable, and the content of harmful gases is reduced, and the oxygen candle can be ignited in 2 seconds.
[Table 0002]
Nitrogen oxide nitrogen oxide detection tube 1.5ppm AQ-1057 carbon monoxide carbon monoxide detection tube 73ppm AQ-1057 chlorine gas chlorine gas detection tube 0ppm AQ-1057 Degree of reaction visually The reaction is stable - temperature surface thermometer 450±2°C - ignition time stopwatch 2s -
[Table 0003]
Barium chromate BaCrO4 powder 84 magnesium powder Mg superfine powder 10 kaolin Al2O3 2SiO2 2H2O powder 4 sodium chlorate NaClO3 powder 2
Experimental result:
The developed solid oxygen-generating propellant is easy to ignite, the reaction is stable, and the content of harmful gases is reduced, and the oxygen candle can be ignited in 2.5 seconds.
[Table 0004]
Nitrogen oxide nitrogen oxide detection tube 1.5ppm AQ-1057 carbon monoxide carbon monoxide detection tube 73ppm AQ-1057 chlorine gas chlorine gas detection tube 0ppm AQ-1057 degree of reaction visual The reaction is stable - temperature surface thermometer 450±2 °C - ignition time stopwatch 2, 5s -
Example 3:
[table 0005]
Barium chromate BaCrO4 powder 84 magnesium powder Mg superfine powder 5 aluminum powder Al superfine powder 5 kaolin Al2O3 2SiO2 2H2O powder 4 sodium chlorate NaClO3 powder 2
Experimental result:
The developed solid oxygen-generating propellant is easy to ignite, the reaction is stable, and the content of harmful gases is reduced, and the oxygen candle can be ignited in 2.6 seconds.
[Table 0006]
Nitrogen oxide nitrogen oxide detection tube 1.5ppm AQ-1057 carbon monoxide carbon monoxide detection tube 73ppm AQ-1057 chlorine gas chlorine gas detection tube 0ppm AQ-1057 degree of reaction visually The reaction is stable - temperature surface thermometer 450±2°C - ignition time stopwatch 2, 6s -
Example 4:
[Table 0007]
Barium chromate BaCrO4 powder 84 magnesium powder Mg super fine powder 5 aluminum powder Al super fine powder 5 kaolin Al2O3 2SiO2 2H2O powder 2 kieselguhr SiO2 powder 2 sodium chlorate NaClO3 powder 2
Experimental result:
The developed solid oxygen-generating propellant is easy to ignite, the reaction is stable, and the content of harmful gases is reduced, and the oxygen candle can be ignited in 2.0 seconds.
[Table 0008]
Nitrogen oxide nitrogen oxide detection tube 1.5ppm AQ-1057 carbon monoxide carbon monoxide detection tube 73ppm AQ-1057 chlorine gas chlorine gas detection tube 0ppm AQ-1057 degree of reaction visually The reaction is stable - temperature surface thermometer 450±2 °C - ignition time stopwatch 2, 0s -
Example 5:
[Table 0009]
Barium chromate BaCrO4 powder 90 magnesium powder Mg superfine powder 3 aluminum powder Al superfine powder 2 kaolin Al2O3 2SiO2 2H2O powder 2 sodium chlorate NaClO3 powder 3
Experimental result:
The developed solid oxygen-generating propellant is easy to ignite, the reaction is stable, and the content of harmful gases is reduced, and the oxygen candle can be ignited in 3.1 seconds.
[Table 0010]
Nitrogen oxide nitrogen oxide detection tube 1.5ppm AQ-1057 carbon monoxide carbon monoxide detection tube 73ppm AQ-1057 chlorine gas chlorine gas detection tube 0ppm AQ-1057 degree of reaction visual The reaction is stable - temperature surface thermometer 450±2°C - ignition time stopwatch 3, 1s -
The production process of the blowing agent in the above examples 1 to 5 is as follows:
First, the barium chromate is dehydrated and dried at a temperature of 80°C. The chlorate is dried in a far-infrared drying oven at 110 ± 5 °C for 1 hour, and then ground to over 80 mesh with a grinder. Then the treated sodium chlorate, barium chromate and other materials are weighed according to a certain ratio and mixed for 30 minutes. After mixing evenly, the mixture is pressed into a cylinder with ϕ=10mm and H=5mm by a tablet machine and the pressure is 0.2t/cm<2>. The prepared solid oxygen generating propellant is placed in the reactor and ignited with a fire cap. The generated gas is collected and the gas composition is detected.
The present invention is advantageous for burning the propellant smoothly without explosion. The present invention has good manufacturing technology, which is easy to manufacture and process. The propellant can burn quickly to absorb the harmful gas nitrous oxide generated by the trigger's fire cap, with the combustion residues being loose and having no expansion, so it is safe and reliable, and can meet long-term storage needs.

权利要求:
Claims (3)
[1]
1. Propellant for oxygen candles, characterized in that the propellant consists of 70 to 90 parts by weight barium chromate, 5 to 15 parts by weight metal element, 3 to 10 parts by weight binder and at most 5 parts by weight chlorate, the metal element being one or a mixture of two or more of magnesium powder, aluminum powder, titanium powder and iron powder, and wherein the binder is one or a mixture of two or more of kaolin, kieselguhr and ceramic clay.
[2]
2. Oxygen candle propellant according to claim 1, characterized in that the chlorate is one or a mixture of sodium chlorate and potassium chlorate.
[3]
3. A process for preparing an oxygen candle propellant according to claim 1, characterized in that the process comprises: pressing a formula amount of barium chromate, metal element, binder and chlorate into an oxygen candle propellant under a pressure of 0.15-0.25 ton/ cm<2>.

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CN108083234B|2017-12-29|2020-11-13|陕西斯达防爆安全科技股份有限公司|Oxygen candle medicine|

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CN107892277A|2017-12-29|2018-04-10|陕西斯达防爆安全科技股份有限公司|A kind of oxygen candle|

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CN108083235B|2017-12-29|2021-03-16|陕西斯达防爆安全科技股份有限公司|Transfer powder for oxygen candle and preparation method thereof|CN108083235B|2017-12-29|2021-03-16|陕西斯达防爆安全科技股份有限公司|Transfer powder for oxygen candle and preparation method thereof|

法律状态:
2021-12-15| PL| Patent ceased|

优先权:

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申请号 | 申请日 | 专利标题

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CN201711482176.5A|CN108083235B|2017-12-29|2017-12-29|Transfer powder for oxygen candle and preparation method thereof|

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PCT/CN2018/111883|WO2019128427A1|2017-12-29|2018-10-25|Oxygen candle starting mix and preparation method therefor|

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