Method for preparing aluminum trihydride by virtue of high-middle-low-temperature direct pressurization process

A kind of aluminum trihydride, high, medium and low temperature technology, applied in chemical instruments and methods, metal hydrides, inorganic chemistry and other directions, can solve the problems of dangerous aluminum trihydride preparation process, low product yield, many by-products, etc., to achieve convenient scale The effect of chemical industry production, good product yield and purity, and simple operation process

Active Publication Date: 2014-12-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems that the existing aluminum hydride preparation process is dangerous, the preparation conditions are harsh, the environment is not friendly, the product yield is low, and there are many by-products, and a method for preparing aluminum hydride by a direct method of high, medium and low temperature pressure is provided. method

Method used

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  • Method for preparing aluminum trihydride by virtue of high-middle-low-temperature direct pressurization process

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] Take an aluminum block with a purity of 99.9% and a particle size of 2mm, soak it in a hydrochloric acid solution with a mass fraction of 1% at 10°C for 15 minutes, rinse it with deionized water at room temperature for 5 times, dry it in vacuum, and weigh it under the protection of argon. 1508g, put it into a stainless steel tank reactor, and place it in the high-pressure reactor cabin; pass in argon to replace the gas in the kettle cabin, pump the pressure in the cabin to a negative pressure of 0.012MPa, and pass it into a high-purity 99.999% After the hydrogen is pumped again until the negative pressure in the cabin is 0.008MPa, repeat the operation 3 times; quickly raise the temperature to 506°C at a heating rate of 15°C / min; 300 atmospheres, react for 60 minutes; cool down at a rate of 8°C / min for 38 minutes to 211°C, keep the temperature constant, continue to feed hydrogen, and continue to react for 118 minutes until the pressure in the hydrogen pressure gauge and t...

Embodiment 2

[0025] Take an aluminum block with a purity of 99.9% and a particle size of 5mm, soak it in a hydrochloric acid solution with a mass fraction of 5% at 15°C for 8 minutes, rinse it with deionized water at room temperature for 4 times, dry it in vacuum, and weigh it under the protection of argon. 2498g, put it into a stainless steel tank reactor, and place it in the high-pressure reactor cabin; pass in argon to replace the gas in the kettle cabin, pump the pressure in the cabin to a negative pressure of 0.011MPa, and pass it into a high-purity 99.999% After the hydrogen is pumped again until the negative pressure in the cabin is 0.007MPa, repeat the operation 3 times; quickly raise the temperature to 566°C at a heating rate of 45°C / min; 150 atmospheres, react for 60 minutes; cool down at a rate of 3°C / min for 154 minutes to 143°C, keep the temperature constant, continue to feed hydrogen, and continue to react for 138 minutes until the pressure in the hydrogen pressure gauge and t...

Embodiment 3

[0027] Take aluminum with a purity of 99.9%, polish the surface oxide layer to a metallic luster with fine sandpaper, process it into a small piece with a particle size of 14mm under the protection of argon, weigh 499g, put it into a stainless steel tank reactor, and place it side by side In the high-pressure reaction kettle cabin; replace the gas in the kettle cabin with argon gas, pump the cabin pressure to a negative pressure of 0.013MPa, and then pump high-purity 99.999% hydrogen gas into the cabin to a negative pressure of 0.010MPa again. Repeat the operation 3 times; quickly raise the temperature to 531°C at a heating rate of 25°C / min; feed high-purity hydrogen, adjust the hydrogen pressure in the input tank to 285 atmospheres, and react for 50 minutes; cool down at a rate of 8°C / min After 51 minutes to 148°C, keep the temperature constant, continue to feed hydrogen, and continue to react for 92 minutes until the pressure in the hydrogen pressure gauge and the high-pressu...

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Abstract

The invention relates to a method for preparing aluminum trihydride by virtue of a high-middle-low-temperature direct pressurization process, belonging to the field of hydrogen metal material preparation. Aluminum trihydride is prepared by reacting metal aluminum and hydrogen at high temperature. By adopting the method disclosed by the invention, the problems of aluminum trihydride industrial large-scale preparation techniques and preparation purity can be solved, no complex production device is used, required preparation devices are simple and easy to purchase, and safe construction of an aluminum trihydride production line can be achieved under an existing factory condition; a preparation process is simple and easy to operate, has inert gas protection in a preparation process, and is safe and reliable; a product is relatively good in yield and purity and good in stability, and can be stored for a long time; 'three wastes' cannot be generated in a production process, and harms to the human body and environment cannot be caused, so that the method is environmental friendly, and has important significance in industrial large-scale safe preparation and large-scale application of high-purity aluminum trihydride.

Description

technical field [0001] The invention relates to a method for preparing aluminum hydride by a direct method of high, medium and low temperature pressure, and belongs to the field of hydrogen metal material preparation. Background technique [0002] With the changes in the international strategic situation, major changes have taken place in the pattern of world wars. Peace and development are still the themes of today's world, but local wars, turbulence and tension have intensified. The Iraq War and Libya War show that future wars The mode is mainly a local war under high-tech conditions. Under such circumstances, it is obvious that high-power explosives represented by aluminum-containing mixed explosives are difficult to adapt to the development of the international war situation. Using new materials in explosives and increasing the heat of detonation by adding fuel with a higher calorific value is an effective way to further improve the explosives' workability. Hydrogen is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B6/06
Inventor 刘吉平刘晓波
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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