Method for preparing nano gamma-AlOOH by utilizing sodium metaaluminate solution

A technology using sodium metaaluminate and sodium metaaluminate, which is applied in the field of preparing nano-γ-AlOOH, can solve the problems of high production cost, complicated preparation materials and low production efficiency of nano-alumina oxyhydroxide, and achieve easy implementation and popularization, The effect of simplifying the preparation process and requiring less equipment

Inactive Publication Date: 2018-08-10
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current preparation of nano-alumina oxyhydroxide still has problems such as long preparation time, complicated preparation materials, cumbersome process, and high equipment requirements due to the high temperature and high pressure conditions required for preparation. These problems have led to the production of nano-alumina oxyhydroxide. The current situation of high cost and low production efficiency

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  • Method for preparing nano gamma-AlOOH by utilizing sodium metaaluminate solution
  • Method for preparing nano gamma-AlOOH by utilizing sodium metaaluminate solution
  • Method for preparing nano gamma-AlOOH by utilizing sodium metaaluminate solution

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Embodiment 1

[0048] A method for preparing nanometer gamma-AlOOH with sodium metaaluminate solution, comprising the steps:

[0049] Step 1, control the temperature of the sodium metaaluminate solution to 25°C, then add 0.29 mol of hydrogen peroxide solution to 0.26 mol of sodium metaaluminate solution, and after fully reacting for 5 minutes, collect the solid product in the reaction solution; wherein, The concentration of the sodium metaaluminate solution is 70g / L, the mass concentration of the hydrogen peroxide solution is 30%, and the ratio of the moles of aluminum in the sodium metaaluminate solution to the moles of hydrogen peroxide in the hydrogen peroxide solution is 1 : 22.5;

[0050] Step 2, washing the solid product until the pH of the product suspension is 7;

[0051] Step 3, drying the product suspension in a constant temperature drying oven at 105° C. for 12 hours to prepare nanometer γ-AlOOH.

[0052] The nano γ-AlOOH prepared in this example is orthogonal γ-aluminum oxyhydr...

Embodiment 2

[0054] A method for preparing nanometer gamma-AlOOH with sodium metaaluminate solution, comprising the steps:

[0055] Step 1, control the temperature of the sodium metaaluminate solution to 25°C, then add 0.32 mol of hydrogen peroxide solution to 0.26 mol of sodium metaaluminate solution, and after fully reacting for 5 minutes, collect the solid product in the reaction solution; wherein, The concentration of the sodium metaaluminate solution is 70 / L, the mass concentration of the hydrogen peroxide solution is 30%, and the ratio of the moles of aluminum in the sodium metaaluminate solution to the moles of hydrogen peroxide in the hydrogen peroxide solution is 1 : 25;

[0056] Step 2, washing the solid product until the pH of the product suspension is 7;

[0057] Step 3, drying the product suspension in a constant temperature drying oven at 105° C. for 12 hours to prepare nanometer γ-AlOOH.

[0058] The XRD spectrum of the nanometer γ-AlOOH prepared in this embodiment is simi...

Embodiment 3

[0060] A method for preparing nanometer gamma-AlOOH with sodium metaaluminate solution, comprising the steps:

[0061] Step 1, control the temperature of the sodium metaaluminate solution to 25°C, then add 0.36 mol of hydrogen peroxide solution to 0.26 mol of sodium metaaluminate solution, and after fully reacting for 5 minutes, collect the solid product in the reaction solution; wherein, The concentration of the sodium metaaluminate solution is 70g / L, the mass concentration of the hydrogen peroxide solution is 30%, and the ratio of the moles of aluminum in the sodium metaaluminate solution to the moles of hydrogen peroxide in the hydrogen peroxide solution is 1 : 27.5;

[0062] Step 2, washing the solid product until the pH of the product suspension is 7;

[0063] Step 3, drying the product suspension in a constant temperature drying oven at 105° C. for 12 hours to prepare nanometer γ-AlOOH.

[0064] The XRD spectrogram of the nano-γ-AlOOH prepared by the present embodiment...

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Abstract

The invention provides a method for preparing nano gamma-AlOOH by utilizing a sodium metaaluminate solution and belongs to the field of inorganic nano-materials. The method comprises the following steps: 1) controlling the temperature of the sodium metaaluminate solution to be 15 to 30 DEG C; then adding a hydrogen peroxide solution into the sodium metaaluminate solution; after sufficiently reacting, collecting solid product in a reaction solution; 2) washing the solid product until the pH (Potential of Hydrogen) of a product suspension solution is 6.8 to 7.2; 3) filtering the product suspension solution in vacuum and drying a solid to prepare the nano gamma-AlOOH. The nano gamma-AlOOH prepared by the method is orthorhombic system AlOOH with the grain diameter of 70 to 200nm and is of a laminated structure; when a lot of the nano gamma-AlOOH is gathered, a plate sheet structure, which is distributed in layers, is formed.

Description

technical field [0001] The invention belongs to the field of inorganic nanometer materials, in particular to a method for preparing nanometer gamma-AlOOH with sodium metaaluminate solution. Background technique [0002] Nano-alumina oxyhydroxide has been widely concerned in the fields of catalysts, adsorbents, ion exchange, ceramics, and optical nano-devices due to its large specific surface area, low density, and non-toxicity. However, the production of nano-alumina oxyhydroxide still faces problems such as complicated preparation process and low production efficiency. Therefore, be badly in need of inventing a kind of preparation method simple and convenient, the production method of quick response. [0003] At present, the main preparation methods of nano-alumina oxyhydroxide are hydrothermal method and hot melt method. For example, in CN104445318A, it is mentioned that in the alcohol-water system, the aluminum salt is used as the precursor by adding an inducer, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/14B82Y40/00
CPCC01F7/141B82Y40/00C01P2002/72C01P2004/03C01P2004/20C01P2004/62C01P2004/64C01P2006/12C01P2006/16
Inventor 魏砾宏蔡炜杨天华张海军
Owner SHENYANG AEROSPACE UNIVERSITY
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