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Method for preparing alpha-aluminum trihydride through electrochemical catalytic deposition

A kind of aluminum trihydride, electrochemical technology, applied in the direction of electrolysis process, electrolysis components, etc., can solve the problems of high environmental requirements, can not meet the weapons and equipment, slow gas release, decomposition and other problems, achieve high yield and selectivity, direct reaction. The effect of low cost and low energy consumption of electrolysis reaction

Inactive Publication Date: 2017-08-01
河南纳宇新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

by AlH 3 There are still many problems in industrialization: AlH 3 The usual preparation method chemical ion exchange method, the preparation process is extremely complicated and the cost is high; the production process of chemical ion exchange hair has high requirements on the environment, and the safety risk is high, and the hydrogen desorption performance of the product is still unstable at low temperature; due to AlH 3 It is a substance composed of two strongly reducing atoms, α-AlH 3 There are still phenomena such as slow degassing and decomposition during storage, which cannot meet the requirements of practical application of weapons and equipment
Although avoiding the use of a large amount of organic solvents, due to the high energy generated by the mechanical solid-state reaction, the yield is very low, and it is an amorphous phase, which is obviously far from the large-scale production of α-AlH with good stability. 3 still far from

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  • Method for preparing alpha-aluminum trihydride through electrochemical catalytic deposition

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Embodiment 1

[0020] A method for preparing α-aluminum hydride by electrochemical catalytic deposition, comprising the following steps:

[0021] (1) Refining of sodium aluminum hydride: take 500g of sodium aluminum hydride, add 0.8L of refined anhydrous ether, stir, then add 2L of unrefined anhydrous ether, continue stirring for 3min, then add 1.0L of unrefined toluene, stir 5min, stand still for 8h; filter the mixed solution after standing still under reduced pressure, distill the filtrate under normal pressure at 90°C, distill off the solvent and recover it for later use, then filter the distilled product with suction and dry under vacuum conditions of 280mmHg and 40°C for 5h to obtain Refined sodium aluminum hydride.

[0022] (2) Electrochemical catalysis prepares α-aluminum trihydride: get the refining sodium aluminum hydride that step (1) obtains and dissolve in ether, carry out vacuum distillation, form electrolytic solution, the concentration of electrolytic solution is 0.05mol / L; T...

Embodiment 2

[0025] A method for preparing α-aluminum hydride by electrochemical catalytic deposition, comprising the following steps:

[0026] (1) Refining of sodium aluminum hydride: Take 1000g of sodium aluminum hydride, add 2.5L of refined anhydrous ether, stir, then add 2L of unrefined anhydrous ether, continue stirring for 3min, then add 3.0L of unrefined toluene, stir 25min, stand still for 16h; filter the mixed solution after standing still under reduced pressure, distill the filtrate under normal pressure at 140°C, distill off the solvent and recover it for later use, then filter the distilled product with suction, under the condition of vacuum degree of 495mmHg and 75°C Dry for 2h to obtain refined sodium aluminum hydride.

[0027] (2) Electrochemical catalysis prepares α-aluminum trihydride: get the refining sodium aluminum hydride that step (1) obtains and dissolve in ether, carry out vacuum distillation, form electrolytic solution, the concentration of electrolytic solution is...

Embodiment 3

[0030] A method for preparing α-aluminum hydride by electrochemical catalytic deposition, comprising the following steps:

[0031] (1) Refining of sodium aluminum hydride: Take 750g of sodium aluminum hydride, add 1.5L of refined anhydrous ether, stir, then add 2L of unrefined anhydrous ether, continue stirring for 3min, then add 2.0L of unrefined toluene, stir 15min, stand still for 12h; filter the mixed solution after standing still under reduced pressure, carry out atmospheric distillation at 120°C for the filtrate, distill off the solvent and recover it for later use, then filter the distillation product with suction, and put it under the condition of vacuum degree of 380mmHg and 60°C Dry for 3.5h to obtain refined sodium aluminum hydride.

[0032] (2) Preparation of α-aluminum trihydride by electrochemical catalysis: get the refined sodium aluminum hydride obtained in step (1) and dissolve it in ether, carry out vacuum distillation to form electrolyte, and the concentrati...

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Abstract

The invention discloses a method for preparing alpha-aluminum trihydride through electrochemical catalytic deposition. The method comprises the following step: (1) refining sodium aluminum hydride; (2) preparing alpha-aluminum trihydride through electrochemical catalytic deposition; and (3) post-treating the product. The method for preparing alpha-aluminum trihydride through electrochemical catalytic deposition is simple to operate, high in efficiency, free from chemical pollution, and small in energy consumption, so that the problems such as high energy consumption and high pollution in etherate and ion exchange method for preparing alpha-AlH3 can be solved. The method is safe, reliable, and high in yield; the electrochemical catalytic deposition reaction is carried out, so that toxic or dangerous oxidants and reducing agents are avoided; the product yield and the available content of the alpha-aluminum trihydride can be realized through electrode potential control; the product yield is up to 64-70%, and the available content of alpha-aluminum trihydride is up to be more than 98%. Therefore, the yield and the selectivity are high.

Description

technical field [0001] The invention relates to a method for preparing α-aluminum hydride by electrochemical catalytic deposition, and specifically belongs to the technical field of preparation of hydrogen-containing compounds. Background technique [0002] Aluminum hydride (AlH3) has the advantages of high combustion calorific value, high gas production rate after combustion, and all the gas can be converted into combustible gas, and the gas after combustion is non-toxic. It is a high-energy propellant and a high-energy additive for high-energy explosives. by AlH 3 There are still many problems in industrialization: AlH 3 The usual preparation method chemical ion exchange method, the preparation process is extremely complicated and the cost is high; the production process of chemical ion exchange hair has high requirements on the environment, and the safety risk is high, and the hydrogen desorption performance of the product is still unstable at low temperature; due to AlH...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00
CPCC25B1/00
Inventor 刘吉平王栋任明安李树磊李守良韩佳苏岩
Owner 河南纳宇新材料有限公司
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