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A kind of method for preparing sodium borohydride

A technology of sodium borohydride and preparation steps, which is applied in the field of preparation of hydrogen storage materials, can solve the problems of complex production process, high preparation cost of hydrogen storage materials, and difficulty in realizing industrialization development, and achieves simple and easily controllable reaction conditions and high yield. , to achieve the effect of industrialized production

Inactive Publication Date: 2017-05-03
INST OF NEW ENERGY SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing sodium borohydride to solve the technical problems in the prior art that the preparation cost of hydrogen storage materials is relatively high or the production process is complicated, and it is difficult to realize industrialization development

Method used

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  • A kind of method for preparing sodium borohydride
  • A kind of method for preparing sodium borohydride
  • A kind of method for preparing sodium borohydride

Examples

Experimental program
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Embodiment 1

[0035] A. Add 7.5g of Na 2 B 4 o 7 Dissolve 3.0g of NaOH in 100mL of deionized water, evaporate the solution to dryness at 70 degrees Celsius to obtain 16.2g of precipitate, place it in a microwave oven, and heat it for 10 minutes to obtain 9.6g of NaBO 2 .

[0036] B. NaBO 2 Dissolved in 150mL of methanol solution, and then evaporated to dryness under negative pressure to obtain NaBO 2 with NaB(OCH 3 ) 4 The mixture was then repeatedly dissolved in methanol and evaporated to dryness under vacuum three times. The final precipitate was 20.4 g after drying and the yield was about 80%. The precipitate was dissolved in THF, centrifuged at a speed of 20,000 rpm, and the supernatant was removed to obtain NaB(OCH 3 ) 4 .

[0037] C. NaBH 4 Configured as a THF solution with a mass fraction of 10%. Take 5.0 g of the solution, together with 12.9 mmol of triethylsilane, and put them into a hydrothermal kettle, and the operation is performed in a glove box under an Ar atmosphe...

Embodiment 2

[0039] A, with embodiment 1;

[0040] B, with embodiment 1;

[0041] C. NaBH 4 Configured as a THF solution with a mass fraction of 10%. Take 5.0 g of this solution, together with 12.9 mmol of triethylsilane, and put them into a hydrothermal kettle, and the operation is carried out in a glove box under an Ar gas environment. Then the hydrothermal still is put into baking oven, is warming up to 150 degree with the speed of 5 degree Celsius / minute. Then the hydrothermal kettle was taken out, the precipitate was filtered out and washed three times with pentane, and dried to obtain NaBH 4 .

Embodiment 3

[0043] A, with embodiment 1;

[0044] B, with embodiment 1;

[0045] C. NaBH 4 Configured as a THF solution with a mass fraction of 10%. Take 5.0 g of this solution, together with 12.9 mmol of triethylsilane, and put them into a hydrothermal kettle, and the operation is carried out in a glove box under an Ar gas environment. Then the hydrothermal still is put into baking oven, is warming up to 200 degrees Celsius with the speed of 5 degrees Celsius / minute. Then the hydrothermal kettle was taken out, the precipitate was filtered out and washed three times with pentane, and dried to obtain NaBH 4 .

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Abstract

The invention discloses a preparation method for sodium borohydride. The method comprises the following preparation methods: Na2B4O7 and NaOH are dissolved in water, a reaction is carried out at a temperature of 60 DEG C-80 DEG C, and NaBO2 is prepared; a methanol solution and NaBO2 are reacted at a temperature of 50 DEG C-90 DEG C, and NaB(OCH3)4 is prepared; NaB(OCH3)4 is prepared into a THF solution with a concentration of 5%-15%, 8-16mmol of triethyl silicane and 2.5-7.5g of the THF solution of NaB(OCH3)4 are taken and are subjected to a synthetic reaction in an inert gas or vacuum environment, and the target product NaBH4 is prepared. In the preparation method, the employed raw materials are low in price, the production processes are simple and easy to control, and the preparation method is beneficial for industrial production.

Description

technical field [0001] The invention relates to the preparation of hydrogen storage materials, in particular to a preparation method of hydrogen storage materials—sodium borohydride. Background technique [0002] At the moment when vigorously developing hydrogen energy vehicles, the storage of hydrogen has become a key issue. As storage materials, metals and their alloys have good properties, but they cannot work under normal temperature and pressure, so they are not ideal hydrogen storage materials. With the deepening of research, multi-component catalysts have become a research hotspot, but the storage materials in hydrogen storage are often only used as one-time materials, resulting in high costs. The cost of a car traveling 400km is as high as 1,000 US dollars. Therefore, it is urgent to develop a low-cost hydrogen storage material. [0003] Recently, people began to transfer the development of portable hydrogen storage technology to sodium borohydride (NaBH 4 ) Hydro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B6/21
Inventor 姚向东肖恩·穆尔
Owner INST OF NEW ENERGY SHENZHEN