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Method for directionally controlling the reaction of LiH and AlCl3 with catalyst to synthesize A1H3

A directional control and catalyst technology, applied in chemical instruments and methods, inorganic chemistry, metal hydride, etc., can solve the problems of AlH3 instability and high cost

Inactive Publication Date: 2012-01-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention is to solve the existing AlH 3 AlH obtained by the preparation method 3 Unstable and high-cost technical problems, while providing catalysts for directional control of LiH and AlCl 3 Reaction to synthesize AlH 3 Methods

Method used

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  • Method for directionally controlling the reaction of LiH and AlCl3 with catalyst to synthesize A1H3
  • Method for directionally controlling the reaction of LiH and AlCl3 with catalyst to synthesize A1H3
  • Method for directionally controlling the reaction of LiH and AlCl3 with catalyst to synthesize A1H3

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specific Embodiment approach 1

[0013] Specific implementation mode 1: The catalyst of this embodiment controls LiH and AlCl in a directional manner 3 Reaction to synthesize AlH 3 The method is carried out according to the following steps: one, press anhydrous AlCl under anhydrous anaerobic condition 3 The mass ratio to tertiary amine is 1:6.5~65, anhydrous AlCl 3 The mass ratio of anhydrous aromatic hydrocarbon solvent is 1:4.5~45 and weigh anhydrous AlCl 3 1. Tertiary amine and anhydrous aromatic hydrocarbon solvent and mix uniformly to obtain solution A; 2. Under anhydrous and oxygen-free conditions, press LiH and anhydrous AlCl in step 1 3 The molar ratio of LiH and anhydrous aromatic hydrocarbon solvent is 1: 3~8, and the mass ratio of LiH and anhydrous aromatic hydrocarbon solvent is 1: 35~350. Weigh LiH and anhydrous aromatic hydrocarbon solvent and mix uniformly to obtain solution B; Add the solution B obtained in step 2 to the solution A obtained in step 1 under the condition of stirring, heat to...

specific Embodiment approach 2

[0015] Embodiment 2: This embodiment differs from Embodiment 1 in that the aromatic hydrocarbon solvent in step 1 is toluene, benzene, xylene or tetrahydrofuran. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0016] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: anhydrous AlCl in step one 3 The mass ratio to tertiary amine is 1:8~60, anhydrous AlCl 3 The mass ratio to the anhydrous aromatic hydrocarbon solvent is 1:5-40. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a method for directionally controlling the reaction of LiH and AlCl3 with a catalyst to synthesize A1H3, which relates to an AlH3 synthesis method. The technical problems that AlH3 made by the traditional AlH3 making method is unstable and requires high cost are solved. The method comprises the following steps of: 1. uniformly mixing anhydrous AlCl3, tertiary amine and an anhydrous aromatic solvent under anhydrous and anaerobic conditions to obtain a solution A; 2. uniformly mixing LiH and the anhydrous aromatic solvent under anhydrous and anaerobic conditions to obtaina solution B; 3. adding the solution B to the solution A, heating under anhydrous and anaerobic conditions for reaction, then standing and filtering to obtain filtrate; 4. removing the solvent in thefiltrate to obtain powder; and 5. vacuum drying to obtain AlH3. The method has low cost and is suitable for industrial production, and products produced with the method are stable. Made AlH3 can be used for making a high-energy solid propellant.

Description

technical field [0001] The present invention relates to AlH 3 synthetic method. Background technique [0002] The development direction of solid rocket propellants is to use composite solid propellants. The widely used composite solid propellant system with metal powder fuels (such as aluminum powder, magnesium powder, etc.) However, with the improvement of the tactical indicators of various strategic and tactical missiles, space vehicles and other weapons, there is an urgent need to use composite solid propellants with larger theoretical specific impulse values. Therefore, fuel additives with higher energy than aluminum powder, magnesium powder, etc. must be selected to effectively increase the energy of the propellant. Compared with the main fuel aluminum powder in the existing solid propellant formulation, AlH 3 It has the advantages of higher heat of combustion and gas generation. It is an ideal fuel for high-energy solid propellants, solid-liquid propellants and liq...

Claims

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Application Information

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IPC IPC(8): C01B6/06
Inventor 杨玉林楚合涛范瑞清李亮
Owner HARBIN INST OF TECH
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