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Flotation method and application of alpha-AlH3

A technology of flotation liquid and suspension liquid, which is applied in flotation, chemical instruments and methods, hydride purification/stabilization, etc. It can solve the problems of reducing the energy of energetic materials, increasing the impact sensitivity and friction sensitivity of propellant slurry, Poor stability and other problems, to achieve the effect of simple and efficient separation technology, low slurry sensitivity, and increased hydrogen content

Active Publication Date: 2019-12-10
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the early 1960s, the U.S. military launched an investigation on AlH 3 was evaluated for military applications and found that AlH 3 Poor stability, hydrogen release during storage, not only reduces the energy of energetic materials, but also affects the preparation process and safety performance of energetic materials
The effect on the sensitivity of the propellant slurry is more obvious, and the addition of AlH with poor crystal form 3 , the impact sensitivity and friction sensitivity of the propellant slurry increase sharply, making it difficult to meet the charge requirements

Method used

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  • Flotation method and application of alpha-AlH3

Examples

Experimental program
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Effect test

Embodiment 1

[0046] an α-AlH 3 The flotation method, the steps are:

[0047] Step 1: Weigh 5gAlH 3 The crude product was placed in a 500mL beaker, and 250mL oleic acid was accurately measured, and after 60min magnetic stirring at 400r / min, the AlH 3 The crude product was completely wetted with oleic acid to give suspension A.

[0048] Step 2: Ultrasonicate the suspension A with an ultrasonic pulverizer at 600W ultrasonic power for 120s, then stir at 800rmp / min for 240min to obtain the suspension B;

[0049] Step 3: Put the suspension B in a separatory funnel and let it stand for 24 hours to separate layers. Suction filter the lower layer solid C and the upper layer suspension D respectively, wash with n-hexane several times, and store in a vacuum oven at 50°C In, after 24 hours of heat preservation, the off-white powder AlH 3 -C3.78g and AlH 3 -D1.13g.

[0050] AlH 3 Crude, AlH obtained 3 -C and AlH 3 -D Test the H content separately, and test the basic formula AlH 3 Impact sensi...

Embodiment 2

[0052] an α-AlH 3 The flotation method, the steps are:

[0053] Step 1: Weigh 5gAlH 3 Put the crude product in a 500mL beaker, accurately measure 500mL of linoleic acid, and stir for 360min under magnetic stirring at 200r / min to make AlH 3 The crude product was completely wetted with linoleic acid to obtain suspension A.

[0054] Step 2: Ultrasonicate the suspension A with an ultrasonic pulverizer at 2000W ultrasonic power for 30s, then stir at 200rmp / min for 360min to obtain the suspension B.

[0055] Step 3: Put the suspension B in a separatory funnel and let it stand for 72 hours to separate layers. Suction filter the lower layer solid C and the upper layer suspension D respectively, wash with n-hexane for several times, and store in a vacuum oven at 30°C In, after 72h of heat preservation, the off-white powder AlH 3 -C4.12g and AlH 3 -D0.86g.

[0056] Step 4: As-is AlH 3 , AlH 3 -C and AlH 3 -D Test the H content separately, and test the basic formula AlH 3 The i...

Embodiment 3

[0058] an α-AlH 3 The flotation method, the steps are:

[0059]Step 1: Weigh 5gAlH 3 Put the crude product in a 500mL beaker, accurately measure 100mL of linolenic acid, and stir the AlH with 1500r / min magnetic force for 30min 3 The crude product was completely wetted by linolenic acid to obtain suspension A.

[0060] Step 2: Ultrasonicate the suspension A with an ultrasonic pulverizer at 400W ultrasonic power for 1200s, then stir at 600rmp / min for 180min to obtain the suspension B.

[0061] Step 3: Put the above suspension B in a separatory funnel and let it stand for 8 hours to separate layers. Suction filter the lower layer solid C and the upper layer suspension D respectively, wash with cyclohexane several times, and vacuum In the drying oven, after 24 hours of heat preservation, the off-white powder AlH 3 -C4.28g and AlH 3 -D0.68g.

[0062] Step 4: As-is AlH 3 , AlH 3 -C and AlH 3 -D Test the H content separately, and test the basic formula AlH 3 The impact sens...

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Abstract

The invention relates to a flotation method and application of alpha-AlH3, and belongs to the technical field of energetic materials. Alpha crystal type AlH3 and non-alpha crystal type AlH3 have different inherent properties such as physical and chemical properties, surface adsorption characteristics, crystal appearance characteristics and the like, so that high-efficiency separation of alpha crystal type AlH3 and non-alpha crystal type AlH3 is realized by adopting a specific flotation solution by virtue of a separation and purification function of ultrasonic waves, and then high-quality alphacrystal type AlH3 and non-alpha crystal type AlH3 are obtained. Safety of an application of the high quality alpha crystal type AlH3 in composite high-energy solid propellants is verified through impact sensitivity and friction sensitivity experiments. The high-quality alpha crystal type AlH3 has high hydrogen content, and slurry sensitivity of the high-energy propellants based on the high-quality alpha crystal type AlH3 is low.

Description

technical field [0001] The present invention relates to a kind of α-AlH 3 The flotation method and its application belong to the technical field of energetic materials, more specifically, it relates to a high-quality α-AlH that can be applied in the field of propellants, explosives or other energetic materials 3 , and its use of liquid-phase ultrasonic-assisted flotation of high-quality α-AlH 3 , increasing AlH 3 Applicable methods in the field of energetic materials. Background technique [0002] Aluminum hydride (AlH 3 ), also known as alane, is a promising high-energy additive for solid propellant formulations. According to theoretical calculations, using AlH 3 Instead of aluminum powder, the specific impulse of the solid propellant can be increased by at least 100N.s.kg -1 , and its combustion chamber and ejection gas temperature are lower than those of propellants containing aluminum powder, AlH 3 Releases 10% of its own weight in H during decomposition 2 , whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B6/06C01B6/34B03D1/00C06D5/00
CPCB03D1/00C01B6/06C01B6/34C06D5/00
Inventor 李磊刘明珠杜芳黄丹椿汪慧思张思邱贤平胡翔陶博文顾健胡建江李伟
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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