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Method for preparing nano aluminum by utilizing chemical method

A technology of nano-aluminum and lithium-aluminum hydride is applied in the field of thermally decomposing aluminum compounds and preparing nano-aluminum, which can solve the problems of difficulty in controlling the particle size of nano-aluminum, complicated operation and high cost.

Active Publication Date: 2012-11-28
河南索顿新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the current method of obtaining nano-aluminum is generally costly, and safety problems are prone to occur in the production process, and the operation is cumbersome. In addition, the particle size of the obtained nano-scale aluminum is difficult to control

Method used

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  • Method for preparing nano aluminum by utilizing chemical method
  • Method for preparing nano aluminum by utilizing chemical method

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preparation example Construction

[0016] The preparation method according to the present invention is specifically described below.

[0017] Step 1), under the protection of an inert gas, add the raw material inorganic aluminum salt compound, lithium aluminum hydride, phosphorus-containing additives and organic solvent into the reactor, and disperse the raw material into the organic solvent by stirring or ultrasonic method.

[0018] In the preparation method of the present invention, the main function of this step is to disperse the raw material inorganic aluminum salt compound and lithium aluminum hydride as the reactant in the organic solvent as the reaction medium, and disperse the phosphorus-containing additive that plays a protective role Into the organic solvent, so that the reaction substance and the protective substance are uniformly dispersed in the medium, so as to facilitate the subsequent heating reaction.

[0019] Inorganic aluminum salt compound is the main raw material of the method of the prese...

Embodiment 1

[0043] In the case of nitrogen protection, 0.267g (2mmol) of anhydrous AlCl was charged into a three-neck round bottom flask 3 , 0.2277g (6mmol) LiAlH 4 , 7.869g (30mmol) TPP (triphenylphosphine) and 20ml xylene, stirring constantly. The three ports were sealed with rubber stoppers; ultrasonic dispersion was performed for 10-120 minutes.

[0044] Under the condition of stirring, slowly increase the temperature to 160°C at a heating rate of 2°C / min. During the reaction, nitrogen gas is continuously fed in. The reaction time is 1 hour. Observe that the color of the solution changes from gray to black. When the reaction is over, stop heating , the temperature was lowered to room temperature under the condition of continuously blowing nitrogen gas.

[0045] After taking out the reaction product, put it into a centrifuge tube for centrifugation, pour off the supernatant, wash the reaction product with methanol, tetrahydrofuran and acetone respectively, vacuum-dry the obtained pro...

Embodiment 2

[0049] In the case of nitrogen protection, 0.267g (2mmol) of anhydrous AlCl was charged into a three-neck round bottom flask 3 , 0.2277g (6mmol) LiAlH 4 , 7.869g (30mmol) TPP (triphenylphosphine) and 20ml xylene, stirring constantly. The three ports were sealed with rubber stoppers; ultrasonic dispersion was performed for 10-120 minutes.

[0050] Under the condition of stirring, the temperature was slowly raised to 170° C. with a heating rate of 3° C. / min. During the reaction, nitrogen gas was continuously fed into it. The reaction time was 1 hour and 30 minutes. The color of the solution was observed to change from gray to black, and the reaction was over. Heating was stopped and the temperature was lowered to room temperature under constant nitrogen sparging.

[0051] After taking out the reaction product, put it into a centrifuge tube for centrifugation, pour off the supernatant, wash the reaction product with ethanol, toluene and ether respectively, vacuum-dry the obtain...

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Abstract

The invention relates to a method for preparing nano aluminum by utilizing a chemical method. With respect to the chemical method, the nano aluminum is prepared by mainly using a method for thermal decomposition of aluminum compounds, wherein the particle diameter of the prepared nano aluminum is within 10-100nm, and five characteristic diffraction peaks of elementary aluminum substance are represented in an X-ray powder diffraction diagram. The method provided by the invention has the advantages of low cost, high safety, simplicity and convenience for operation and controllable product particle size.

Description

technical field [0001] The invention relates to a method for preparing nano-level aluminum (hereinafter referred to as nano-aluminum), specifically, it involves the preparation of nano-aluminum by using chemical methods, mainly by thermally decomposing aluminum compounds. The invention has the advantages of low cost, high safety, easy operation and controllable product granularity. Background technique [0002] The content of aluminum is second only to the content of iron among the metal elements in the earth's crust, ranking second. In daily life, various aluminum products have been widely used by people. Nano-aluminum is a new type of material that has been widely studied and put into practical use in recent years. The application value of nano-aluminum in rocket propellant, gunpowder, medicine and solar cells is being discovered and reused. The following describes the application of these aspects in detail. [0003] The application of nano-aluminum in rocket propellant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 陶栋梁崔玉民崔越徐征赵谡玲章桥新黄进
Owner 河南索顿新材料有限公司
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