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Preparation method of gamma-aluminium oxide (Al2O3) nanofiber

A nanofiber and filter cake technology, applied in the field of preparation of γ-Al2O3 materials, can solve problems such as unfavorable environmental protection, complicated preparation process, expensive raw materials, etc., and achieve the effects of convenient industrial production, cheap raw materials, and environmental friendliness.

Active Publication Date: 2013-06-19
浙江泰德新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al with larger specific surface area and larger pore size can be obtained by using organic templates, pore expanders, etc. 2 o 3 materials, but these preparation processes have disadvantages such as complicated preparation process and expensive raw materials
At the same time, it is easy to produce a large amount of harmful gases containing sulfur and nitrogen during the removal process of organic template agents or pore expanders, which is not conducive to environmental protection
These disadvantages limit the industrial application of these methods

Method used

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  • Preparation method of gamma-aluminium oxide (Al2O3) nanofiber
  • Preparation method of gamma-aluminium oxide (Al2O3) nanofiber
  • Preparation method of gamma-aluminium oxide (Al2O3) nanofiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment (1

[0027] 88 grams of Al(NO 3 ) 3 9H 2 O and 50 g Na 2 CO 3 Dissolve in 250 and 750 milliliters of deionized water respectively and make 15wt% and 6wt% solution, then Al(NO 3 ) 3 and Na 2 CO 3 The solution was mixed at 95°C for precipitation reaction. Filter the obtained suspension to obtain a filter cake, wash the filter cake with deionized water, and then filter again. After several washes and filtration treatments, the filter cake was treated with ethanol. After filtering and recovering ethanol, the resulting filter cake was roasted at 400°C for 5 hours to obtain Al 2 o 3 sample. figure 1 is a TEM image showing the presence of nanofibrous particles. figure 2 is the XRD pattern, indicating that the material is γ-Al 2 o 3 .

Embodiment (2

[0029] 78 g Al 2 (SO 4 ) 3 18H 2 O and 50 g Na 2 CO 3 were dissolved in 250 and 750 ml of deionized water to form 12wt% and 6wt% solutions, and then the Al 2 (SO 4 ) 3 and Na 2 CO 3 The solution was mixed at 95°C for precipitation reaction. Filter the obtained suspension to obtain a filter cake, wash the filter cake with deionized water, and then filter again. After several washes and filtrations, the precipitated filter cake was treated with ethanol. After filtering and recovering ethanol, the resulting filter cake was roasted at 400°C for 5 hours to obtain Al 2 o 3 sample.

Embodiment (3

[0031] 17.7 g of Al(NO 3 ) 3 9H 2 O and 10 g Na 2 CO 3 Dissolve in 50 and 150 milliliters of deionized water respectively and make 15wt% and 6wt% solution, then Al(NO 3 ) 3 and Na 2 CO 3 The solution was mixed at room temperature for precipitation. Filter the obtained suspension to obtain a filter cake, wash the filter cake with deionized water, and then filter again. After several washes and filtrations, the precipitated filter cake was treated with ethanol. After filtering and recovering ethanol, the resulting filter cake was roasted at 400°C for 5 hours to obtain Al 2 o 3 sample.

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Abstract

The invention discloses a preparation method of gamma-aluminium oxide (Al2O3) nanofiber. The preparation method comprises the following steps of: (a) mixing aluminum-containing inorganic salt solution and alkaline precipitant solution according to the volume ratio of 1:(2-5) and reacting at the temperature of between 30 and 100 DEG C to obtain a suspension; (b) filtering the suspension to obtain a filter cake, and pulping and filtering in deionized water to remove impurities to obtain a filter cake I; (c) treating the filter cake I prepared in the step (b) in an organic solvent, and carrying out filtering and recovering the organic solvent to obtain a filter cake II; and (d) roasting the filter cake II prepared in the step (c) at the temperature of between 300 and 600 DEG C to obtain the gamma-Al2O3 nanofiber material. The preparation method is simple and can be applied to industry. The prepared gamma-Al2O3 has the characteristics of large aperture and large specific surface area.

Description

(1) Technical field [0001] The present invention relates to a kind of γ-Al 2 o 3 Preparation method of material, especially related to a kind of γ-Al 2 o 3 Preparation methods of nanomaterials. (2) Background technology [0002] γ-Al 2 o 3 It is a commonly used catalyst carrier and is widely used in the preparation of various supported catalysts. γ-Al 2 o 3 The specific surface area, pore size, pore volume and morphology of the support have an important influence on the activity and selectivity of the catalyst. As people pay more and more attention to the catalytic conversion of macromolecules such as biomass, heavy oil and residual oil, there is an urgent need for γ-Al 2 o 3 The carrier has a larger specific surface area (to improve the dispersion of the supported metal components) and a pore size (to improve the diffusion of macromolecular compounds in the pores), so as to improve the reaction performance of the catalyst. However, the γ-Al currently on the marke...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02B82Y40/00
Inventor 姚楠李小年马成成
Owner 浙江泰德新材料有限公司