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Preparation method of high-purity LiNH2BH3 and NaNH2BH3

A high-purity and particle size technology, applied in the direction of borane/diborane hydride, etc., can solve the problems of difficult control of reaction temperature, low product purity, affecting hydrogen release performance, etc., to achieve product particle size controllability, process Simple, easy-to-use effects

Inactive Publication Date: 2010-06-23
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fossil fuels, which are non-renewable resources, are the main energy source at present, but there are many deficiencies in using them as an energy source: first, the economic benefits generated by the above-mentioned utilization forms are very low; second, fossil fuels are accompanied by various forms of pollution during the production process; Furthermore, with the continuous depletion of its reserves, its consumption as a form of energy has brought a lot of pressure to other applications
However, due to the uneven contact of materials during the ball milling process and the difficulty in controlling the reaction temperature, the purity of the product is not high, which affects the hydrogen release performance.

Method used

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  • Preparation method of high-purity LiNH2BH3 and NaNH2BH3
  • Preparation method of high-purity LiNH2BH3 and NaNH2BH3
  • Preparation method of high-purity LiNH2BH3 and NaNH2BH3

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Preparation of LiNH 2 BH 3

[0025] 1g BH at room temperature 25℃ 3 NH 3 Dissolve in 50ml of tetrahydrofuran in argon to dissolve completely. The above solution was slowly added to 0.2g LiH, after reacting for 1 hour, the solution was centrifuged, and the supernatant was decanted. After washing the product three times with 50 mL of tetrahydrofuran, the solid product after centrifugation was vacuum dried for 3 hours to obtain the final product ( figure 1 Is the XRD spectrum of the obtained product; figure 2 Is the thermogravimetric diagram of the product).

Embodiment 2

[0026] Example 2 Preparation of LiNH 2 BH 3

[0027] 1g BH at room temperature 25℃ 3 NH 3 Dissolve it in 50ml of ether in argon to dissolve completely. The above solution was slowly added to 0.2g LiH, after 30 minutes of reaction, the solution was centrifuged, and the supernatant was decanted. After washing the product three times with 50 mL of tetrahydrofuran, the solid product after centrifugation was vacuum dried for 3 hours to obtain the final product ( figure 1 Is the XRD spectrum of the obtained product; figure 2 Is the thermogravimetric diagram of the product).

Embodiment 3

[0028] Example 3 Preparation of NaNH 2 BH 3

[0029] 1g BH at room temperature 25℃ 3 NH 3 Dissolve in 50ml of tetrahydrofuran in argon to dissolve completely. The above solution was slowly added to 0.5g NaH, and after reacting for 1 hour, the solution was centrifuged, and the supernatant was decanted. After washing the product three times with 50 mL of tetrahydrofuran, the solid product after centrifugation was vacuum dried for 3 hours to obtain the final product ( image 3 Is the XRD spectrum of the resulting product).

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Abstract

The invention belongs to the technical field of material preparation, in particular to a preparation method of high-purity LiNH2BH3 and NaNH2BH3. In the method of the invention, liquid-solid reaction is carried out for synthetizing LiNH2BH3 and NaNH2BH3 under an anhydrous oxygen-free inert atmosphere; after LiNH2BH3 and NaNH2BH3 are washed by solvent, the solvent is removed with a vacuum devolatilization method to obtain high-purity solid LiNH2BH3 and NaNH2BH3; and particles with different granularities are prepared by changing synthesis conditions. The method of the invention has simple technology, convenient operation, easy realization and no high requirements on equipment, can produce high-purity products, and product granularity has certain controllability.

Description

Technical field [0001] The invention belongs to the technical field of material preparation, and specifically relates to a high-purity LiNH 2 BH 3 , NaNH 2 BH 3 The preparation method. Background technique [0002] As we all know, the energy issue has become a major issue facing the world today. With the development of the national economy and the deepening of urbanization, energy problems have increasingly restricted my country's economic development and the improvement of people's quality of life. Fossil fuels, which are non-renewable resources, are the main energy source at present, but there are many shortcomings in using them as energy sources: first, the economic benefits of the aforementioned use forms are very low; second, fossil fuels are accompanied by various forms of pollution in the production process; Furthermore, as its reserves continue to deplete, its consumption as a form of energy brings a lot of pressure to other applications. [0003] Hydrogen energy has the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B6/21
Inventor 余学斌郭艳辉夏广林高梁
Owner FUDAN UNIV
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