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A kind of preparation method and application of nano-alumina

A nano-alumina and nano-alumina technology, which is applied in the field of preparation of inorganic nano-materials, can solve the problems of cost limitation, high price, complicated process, etc., and achieve the effects of mild preparation conditions, adjustable pore distribution, and cheap raw materials

Active Publication Date: 2011-12-14
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing methods for preparing nano-alumina, the raw materials used mostly include expensive aluminum alkoxides and surfactants. The controllability is not strong, which limits the large-scale preparation of nano-alumina in terms of cost and quality.

Method used

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  • A kind of preparation method and application of nano-alumina
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  • A kind of preparation method and application of nano-alumina

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Dissolve 10g of aluminum nitrate into 50ml of ethanol, add 0.3ml of acetic acid (glacial acetic acid, ≥99.5%) under stirring at 80°C, then add ammonium carbonate solution (1.0mol / L) under stirring until the pH of the mixed liquid is 9.5, and continue stirring for 2 After 1 hour, it was aged at 80°C for 24 hours, and the precipitate was filtered out, dried at 110°C for 12 hours, and calcined at 600°C for 5 hours to obtain sample S1, whose physical adsorption data are listed in Table 1.

Embodiment 2

[0047] Dissolve 10g of aluminum nitrate into 50ml of ethanol, add 0.3ml of acetic acid (glacial acetic acid, ≥99.5%) under stirring at 80°C, then add ammonium carbonate solution (1.0mol / L) under stirring until the pH of the mixed liquid is 8.5, and continue stirring for 2 After 1 hour, it was aged at 80°C for 24 hours, and the precipitate was filtered out, dried at 110°C for 12 hours, and calcined at 600°C for 5 hours to obtain sample S2, whose physical adsorption data are listed in Table 1.

Embodiment 3

[0049] Dissolve 10g of aluminum nitrate in 50ml of ethanol, add 0.3ml of acetic acid (glacial acetic acid, ≥99.5%) under stirring at 70°C, then add ammonium carbonate solution (1.0mol / L) under stirring until the pH of the mixed liquid is 7.5, and continue stirring for 2 After 1 hour, it was aged at 80°C for 24 hours, the precipitate was filtered out, dried at 110°C for 12 hours, and then calcined at 600°C for 5 hours to obtain sample S3, whose physical adsorption data are listed in Table 1.

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Abstract

The invention belongs to the technical field of inorganic nano-material preparation, and particularly discloses a preparation method of nano-alumina; the method comprises the following steps: preparing a aluminium nitrate alcoholic solution A with a concentration of 0.10-0.50 g / ml; preparing an ammonium carbonate or ammonium bicarbonate aqueous solution B with a NH4 concentration of 1-4 mol / L; adding a proper amount of organic acids into the solution A under stirring at 60-80 DEG C, adding the solution B into the solution A under stirring, stopping adding the solution B till the pH of the reaction system reaches a target pH value, uniformly stirring to obtain a sol C; continuing stirring the sol C for 2-15 hours, aging at 60-80 DEG C for 15-60 hours; filtering the aged sol C, drying and roasting the solid obtained after filtration so as to obtain the product. The morphology of the product can be controlled by the pH value of the reaction system, and the pore distribution is adjustable; therefore the product is especially suitable to be used as a carrier of a Fischer-Tropsch synthesis catalyst.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic nanometer materials, in particular to a preparation method and application of nanometer alumina, and the nanometer alumina material is suitable as a carrier of a Fischer-Tropsch synthesis catalyst. Background technique [0002] The size of nanomaterials is in the range of 1-100nm, which is different from ordinary materials in microstructure. Its fine grains, high interface density and interaction between constituent phases make it have many unique physical and chemical properties different from ordinary materials. Nano-alumina has outstanding advantages such as large specific surface area, good mechanical properties, abrasion resistance, corrosion resistance, stable chemical properties, strong adsorption capacity and catalytic activity, so it is widely used in the fields of adsorbents, catalysts and catalyst carriers. [0003] Fischer-Tropsch synthesis refers to the process of con...

Claims

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Application Information

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IPC IPC(8): C01F7/02B82Y40/00B01J21/04
Inventor 李金林刘成超张煜华刘家举胡春玲
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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