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Preparation method for diamine diborohydride

A technology of diammonium borohydride and dihydrogen, applied in the field of preparation of diammonium borohydride, diammonium boron hydride, can solve problems such as complex operation process, long reaction process, harsh reaction conditions, etc., and achieve simple synthesis process and operation, high product The effect of high purity and moderate cost

Inactive Publication Date: 2015-02-18
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reaction process is longer and requires the use of liquid NH 3 , relatively inconvenient
[0004] In general, the above reactions require the use of liquid NH 3 , while liquid NH 3 The use needs to be carried out at -78°C, the reaction conditions are relatively harsh and the operation process is relatively complicated, requiring 2 to 3 steps of reaction operation, the cost is high and it is difficult to carry out large-scale production

Method used

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  • Preparation method for diamine diborohydride
  • Preparation method for diamine diborohydride
  • Preparation method for diamine diborohydride

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Embodiment Construction

[0023] 1. Preparation of DADB device

[0024] Laboratory prepared DADB can be used figure 1The device, the reaction chamber is a three-necked flask, the left and right sides are inlets for ammonia gas and borane gas respectively, the middle branch of the three-necked flask is connected to a settling tube, and the settling tube is connected to a bubbler. The borane generator is a three-necked bottle, the middle branch is connected to a constant pressure funnel, and the left and right sides are the carrier gas inlet and outlet respectively. The three-neck flask was placed in an ice bath to control the reaction temperature. Ammonia gas uses dry pure ammonia gas or a mixed gas of ammonia gas, nitrogen gas, helium gas, hydrogen gas or argon gas, and borane is produced immediately by the precursor generator. During the reaction, the materials placed in the generator react to release borane gas, which is taken out of the generator by nitrogen gas and enters the three-necked bottle ...

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Abstract

The invention belongs to the technical field of material preparation, and particularly relates to a preparation method for high-hydrogen-content diamine diborohydride. The method comprises the following steps of introducing borane and ammonia into a reaction chamber, and performing mixing reaction to generate [(NH3)2BH2]+[BH4]-(NH3)n; performing vacuum treatment or borane generation treatment to prepare the diamine diborohydride. According to the method, the process is simple, the use of a solvent is avoided, and the purity of the product is high, the cost is lower, and the large-sclae production can be realized.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing borohydride diammonium dihydroboron. Background technique [0002] The molecular formula of borohydride diammonium dihydroboron is [(NH 3 ) 2 BH 2 ] + [BH 4 ] - , abbreviated as DADB in English, is a colorless, non-volatile, salt-like crystal, which has attracted widespread attention due to its high hydrogen content (19.7 wt.%), stable hydrogen storage capacity, and good decomposition and release of hydrogen . At the same time, DADB has a lower hydrogen desorption temperature than ammonia borane (AB), and a lot of research work has been carried out. A series of solid hydrogen storage materials with excellent hydrogen desorption performance have been developed around this substance, and its demand is increasing day by day. However, due to the limitation of its synthesis process and the restriction of synthesis cost, the synthe...

Claims

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Application Information

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IPC IPC(8): C01B6/13
CPCC01B6/13
Inventor 郭艳辉宋袁周马晓华
Owner FUDAN UNIV