Method for removing alpha '-crystal form aluminum hydride

A technology of aluminum hydride and crystal form, which is applied in the field of aluminum hydride and α′ crystal form aluminum hydride removal, can solve the problem of incomplete removal of α’ crystal form aluminum hydride, and achieve simple and easy operation of the reaction device, solvent The effect of small amount and high purity

Active Publication Date: 2021-01-12
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a method for removing α' crystal form aluminum hydride, and solve the technical problem of incomplete removal of α' crystal form aluminum hydride in the prior art

Method used

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  • Method for removing alpha '-crystal form aluminum hydride
  • Method for removing alpha '-crystal form aluminum hydride

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Embodiment 1

[0037] This embodiment provides a method for removing α' crystal form aluminum trihydride, which is carried out according to the following steps:

[0038] Step 1, under an inert dry atmosphere, take aluminum trihydride to be purified, add solvent toluene, and mix evenly by ultrasonic waves;

[0039] The purity of the aluminum trihydride to be purified is 99.0wt.%, that is, it contains 1.0wt.% of α' crystal form aluminum trihydride.

[0040] The mass volume ratio of the aluminum trihydride to be purified and the solvent is: 0.8g: 16ml;

[0041] Step 2, transfer the uniformly mixed solution in step 1 to the reactor, seal the reactor, place the reactor in an oven and raise the temperature to 140°C, and react at a constant temperature for 8 hours;

[0042] In step 3, after the reaction is finished, cool naturally and filter, and the product obtained is pure-phase α-crystal form aluminum trihydride.

[0043] Product Purity Analysis:

[0044] figure 1 It is the XRD pattern of al...

Embodiment 2

[0048] This embodiment provides a method for removing α' crystal form aluminum trihydride, which is carried out according to the following steps:

[0049] Step 1, under an inert dry atmosphere, take aluminum trihydride to be purified, add solvent toluene, and mix evenly by ultrasonic waves;

[0050] The purity of the aluminum trihydride to be purified is 99.0wt.%, that is, it contains 1.0wt.% of α' crystal form aluminum trihydride.

[0051] The mass volume ratio of the aluminum trihydride to be purified and the solvent is: 0.5g: 15ml;

[0052] Step 2, transfer the uniformly mixed solution in step 1 to the reactor, seal the reactor, place the reactor in an oven and raise the temperature to 100°C, and react at a constant temperature for 10 hours;

[0053] In step 3, after the reaction is finished, cool naturally and filter, and the product obtained is pure-phase α-crystal form aluminum trihydride.

[0054] The product purity analysis of this embodiment is basically the same as...

Embodiment 3

[0056] This embodiment provides a method for removing α' crystal form aluminum trihydride, which is carried out according to the following steps:

[0057] Step 1, under an inert dry atmosphere, take aluminum trihydride to be purified, add solvent toluene, and mix evenly by ultrasonic waves;

[0058] The purity of the aluminum trihydride to be purified is 99.0wt.%, that is, it contains 1.0wt.% of α' crystal form aluminum trihydride.

[0059] The mass volume ratio of the aluminum trihydride to be purified and the solvent is: 1.0g: 18ml;

[0060] Step 2, transfer the uniformly mixed liquid in step 1 to the reactor, seal the reactor, place the reactor in an oven and raise the temperature to 160°C, and react at a constant temperature for 6 hours;

[0061] In step 3, after the reaction is finished, cool naturally and filter, and the product obtained is pure-phase α-crystal form aluminum trihydride.

[0062] The product purity analysis of this embodiment is basically the same as th...

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Abstract

The invention provides a method for removing alpha '-crystal form aluminum hydride. The method comprises the following steps: 1. In an inert dry atmosphere, taking aluminum hydride to be purified, adding a solvent, and uniformly mixing; 2, transferring the uniformly mixed solution obtained in the step 1 to a reaction kettle, sealing the reaction kettle, heating the reaction kettle to 100-160 DEG C, and carrying out a constant temperature reaction; and 3, after the reaction is finished, naturally cooling and filtering to obtain a product, namely pure-phase alpha-crystal form aluminum hydride. According to the method disclosed by the invention, the alpha'-crystal form aluminum hydride can be completely and thoroughly removed, the purity of the finally obtained product is high and is alpha crystal form, and the alpha'-crystal form cannot be detected in the finally obtained product. According to the method, the amount of the used solvent is small, the reaction device is simple and easy tooperate, and the obtained product is free of alpha'-crystal form aluminum hydride. The method is mainly used for removing alpha'-crystal form aluminum hydride.

Description

technical field [0001] The invention belongs to the field of high active material preparation, relates to aluminum trihydride, in particular to a method for removing α' crystal form aluminum trihydride. Background technique [0002] α-AlH 3 It is a binary covalent hydride, the mass hydrogen storage can reach 10.08%, the volume hydrogen storage is 0.148Kg / L (twice the density of liquid hydrogen), in view of its high hydrogen storage capacity, it can be used as hydrogen storage material, in addition to its high heat of combustion and specific impulse, 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 , wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B6/34C01B6/06
CPCC01B6/34C01B6/06C01P2002/72Y02E60/32
Inventor 秦明娜张彦石强唐望郭涛
Owner XIAN MODERN CHEM RES INST
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