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Preparation method of amino borane

A technology of aminoborane and synthesis method, which is applied in the field of preparation of hydrogen energy carriers, can solve problems such as environmental pollution and cost, and achieve the effects of high purity, high yield, and mild temperature

Inactive Publication Date: 2013-05-22
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, there is no direct hydrogen resource. More than 90% of hydrogen production is obtained from fossil fuels such as natural gas, but at the same time it will be accompanied by carbon dioxide emissions, causing pollution to the environment; then there is no infrastructure for hydrogen energy transportation, and Building a new hydrogen energy distribution system is very expensive; finally, with the improvement of fuel cell technology, on-board hydrogen storage technology has become the biggest limiting factor for the application of hydrogen energy in vehicles. Therefore, an efficient hydrogen storage material It is very important to develop

Method used

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  • Preparation method of amino borane
  • Preparation method of amino borane
  • Preparation method of amino borane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Weigh 0.15mol of sodium borohydride and methylamine hydrochloride respectively, then put the mixture of methylamine hydrochloride and sodium borohydride into a 500mL two-neck round bottom flask, put a magnet and measure 200mL of tetrahydrofuran Add it into a round bottom flask, control the reaction temperature at 25°C, and react for 12 hours to obtain a reaction mixture solution. The reaction mixture solution is filtered under reduced pressure to obtain a filtrate, and then tetrahydrofuran is removed at room temperature to obtain the initial product.

[0021] 2) Dissolve the obtained primary product in anhydrous ether, stir in an ice-water bath for 1 h, and then filter under reduced pressure to obtain the filtrate. After removing the ether, a white crystalline solid is obtained, which is methylaminoborane.

[0022] 3) Purity testing

[0023] The quality of the obtained product was claimed to be 4.3 g, and the calculated yield was 70%. Then by using RuCl 3 ·3H 2 O ...

Embodiment 2

[0028] 1) Weigh 0.005mol of sodium borohydride and methylamine hydrochloride respectively, then put the mixture of methylamine hydrochloride and sodium borohydride into a 100mL two-neck round bottom flask, put a magnet, and then measure Add 10ml of tetrahydrofuran into a round bottom flask, control the reaction temperature at 25°C, and the reaction time is 2h, 4h, 6h, and 24h respectively to obtain a reaction mixture solution, and obtain a filtrate by filtering the reaction mixture solution under reduced pressure, and then at room temperature Removal of tetrahydrofuran gave the crude product.

[0029] 2) Dissolve the obtained primary product in anhydrous ether, stir in an ice-water bath for 1 h, then filter under reduced pressure to obtain the filtrate, remove the ether, and obtain a white crystalline solid that is methylaminoborane.

[0030] 3) Purity testing

[0031] It is claimed that the amount of methylaminoborane obtained when the reaction time is 2h, 4h, 6h and 24h is ...

Embodiment 3

[0034] 1) Weigh 0.005mol of sodium borohydride and dimethylamine hydrochloride respectively, then put the mixture of dimethylamine hydrochloride and sodium borohydride into a 100mL two-necked round bottom flask, put a magnet, and measure Take 10ml of tetrahydrofuran and add it into a round bottom flask, control the reaction temperature at 25°C, and react for 12 hours to obtain a reaction mixture solution. The reaction mixture solution is filtered under reduced pressure to obtain a filtrate, and then tetrahydrofuran is removed at room temperature to obtain the initial product.

[0035] 2) Dissolve the obtained primary product in anhydrous ether, stir in an ice-water bath for 1 h, and then filter under reduced pressure to obtain the filtrate. After removing the ether, a white crystalline solid is obtained, which is dimethylaminoborane.

[0036] 3) Purity testing

[0037] The quality of the product was weighed to be 0.15 g of dimethylaminoborane, the yield was 50.76%, and the purit...

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Abstract

The invention relates to a preparation method of amino borane. According to the method, through taking ammonium salts and sodium borohydride as raw materials, taking an organic solvent as a reaction medium, and taking ethyl ether as a purification medium, methylamine borane is synthesized through common chemical reaction. The invention provides a method capable of synthesizing amino borane in the air, which provides great convenience for future industrial production and applications. The preparation method disclosed by the invention is simple in reaction method, low in cost and moderate in temperature; an operation of reaction can be performed at room temperature, and obtained products are high in purity and high in yield.

Description

technical field [0001] The invention relates to a method for preparing a hydrogen energy carrier, in particular to a method for preparing an aminoborane. Background technique [0002] Due to the long-term and massive consumption of fossil fuels such as petroleum, the resources are gradually depleted, and the human demand for energy is getting higher and higher, so a new energy carrier is strongly required. Hydrogen energy has attracted people's attention as an efficient and clean energy source. However, there are several challenges in realizing the application of hydrogen energy. First of all, there is no direct hydrogen resource, and more than 90% of hydrogen production is obtained from fossil fuels such as natural gas, but at the same time, it will be accompanied by carbon dioxide emissions, causing pollution to the environment; then there is no infrastructure for hydrogen energy transportation, and Building a new hydrogen energy distribution system is very expensive; fin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F5/02
Inventor 罗威杨兰程功臻
Owner WUHAN UNIV
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