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Method for preparing bar-shaped ammonium aluminum carbonate without template agent

An ammonium aluminum carbonate, template-free technology, applied in aluminum carbonate compounds, chemical instruments and methods, inorganic chemistry and other directions, can solve the problems of high preparation cost, complex preparation process, environmental pollution, etc., and achieves simple preparation method and simplified preparation. Process and environment-friendly effects

Inactive Publication Date: 2018-09-04
SHAANXI XUEQIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the morphology control agent used in the preparation process is often an organic surfactant, the preparation cost is high, the preparation process is complicated, and a series of environmental pollution problems are likely to be caused during the preparation and post-clearing process.

Method used

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  • Method for preparing bar-shaped ammonium aluminum carbonate without template agent
  • Method for preparing bar-shaped ammonium aluminum carbonate without template agent
  • Method for preparing bar-shaped ammonium aluminum carbonate without template agent

Examples

Experimental program
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Effect test

Embodiment 1

[0032] In this embodiment, a method for preparing rod-shaped ammonium aluminum carbonate without a template is to use aluminum nitrate as the aluminum source and urea as the precipitating agent to synthesize rod-shaped ammonium aluminum carbonate by hydrothermal method.

[0033] A kind of preparation rod aluminum ammonium carbonate without template, its preparation process is specifically as follows:

[0034] Weigh 4g of aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and 9.6g urea (n 硝酸铝 :n 尿素 =1:15) was dissolved in 20mL of distilled water, and the mixed solution was stirred for 30 minutes, so that the reactant was fully dissolved to obtain a reaction mixed solution, and then the gained reaction mixture solution was transferred to a high-pressure hydrothermal reaction kettle, and the high-pressure hydrothermal reaction The kettle was sealed and reacted in an oven at 180°C for 12 hours, then the high-pressure hydrothermal reaction kettle was naturally cooled to room temperature, fi...

Embodiment 2

[0036] A kind of preparation rod aluminum ammonium carbonate without template, its preparation process is specifically as follows:

[0037] Weigh 4g of aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and 8.32g urea (n 硝酸铝 :n 尿素 =1:13) was dissolved in 20mL of distilled water, and the mixed solution was stirred for 30 minutes so that the reactants were fully dissolved to obtain a reaction mixed solution, then the resulting reaction mixture solution was transferred to a high-pressure hydrothermal reaction kettle, and the high-pressure hydrothermal reaction The kettle was sealed and reacted in an oven at 160°C for 16 hours, then the high-pressure hydrothermal reactor was naturally cooled to room temperature, filtered and the precipitate was retained, and the product was repeatedly washed with absolute ethanol and distilled water to remove the reaction by-products, and the resulting solid product was Dry it in a vacuum oven at 70°C for 12 hours, and naturally cool to room temperature to...

Embodiment 3

[0039] A kind of preparation rod aluminum ammonium carbonate without template, its preparation process is specifically as follows:

[0040] Weigh 4g of aluminum nitrate (Al(NO 3 ) 3 9H 2 O) and 11.52g urea (n 硝酸铝 :n 尿素 =1:18) was dissolved in 20mL of distilled water, and the mixed solution was stirred for 60 minutes so that the reactant was fully dissolved to obtain a reaction mixed solution, and then the gained reaction mixture solution was transferred to a high-pressure hydrothermal reaction kettle, and the high-pressure hydrothermal reaction The kettle was sealed and reacted in an oven at 200°C for 8 hours, then the high-pressure hydrothermal reactor was naturally cooled to room temperature, filtered and the precipitate was retained, and the product was repeatedly washed with absolute ethanol and distilled water to remove the reaction by-products, and the obtained solid product was Dry it in a vacuum oven at 80°C for 20 hours, and naturally cool to room temperature to o...

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Abstract

The invention discloses a method for preparing bar-shaped ammonium aluminum carbonate without a template agent. According to the method, an ammonium aluminum carbonate micron bar is hydrothermally synthesized without the template agent by taking Al(NO3)3 as an aluminum source and urea as a precipitator; and the ammonium aluminum carbonate micron bar prepared through hydrothermal reaction without the template agent is high in length-diameter ratio, regular in shape and good in crystallization performance. The bar-shaped micron bar prepared by virtue of the method is high in length-diameter ratio, the average length is about 15 microns, the average diameter is about 200nm, and the length-diameter ratio is about 75 to 1. The shape of the product is not controlled by virtue of a surfactant inthe preparation process, so that the preparation cost is lowered, the preparation process is simplified, a series of environmental pollution problems in the preparation process and the later-period cleaning process are avoided, the preparation process adopted in the method is an environment-friendly preparation process and is accordant with the environment-friendly development idea nowadays, and the preparation method is simple and convenient, the cost is low and the environmental friendliness is high.

Description

technical field [0001] The invention relates to a method for preparing rod-shaped ammonium aluminum carbonate, in particular to a method for preparing rod-shaped ammonium aluminum carbonate without a template agent. Background technique [0002] Aluminum ammonium carbonate (AACH) is a new type of alumina precursor, because it can absorb a large amount of heat during the decomposition process, and the decomposition product is mesoporous alumina with a high specific surface area, and the gas generated during the decomposition process has little environmental pollution And other advantages, it has broad application prospects in the fields of flame retardancy, catalysis, adsorption and so on. At present, using aluminum salt and urea as reactants, the precipitation method to prepare AACH is the most commonly used preparation method. However, factors such as the degree of agglomeration, grain size, and purity of the product obtained by this method are often affected by the mixing ...

Claims

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Application Information

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IPC IPC(8): C01F7/00
CPCC01P2004/03C01P2004/04C01P2004/10C01P2002/72C01P2002/88C01F7/782
Inventor 王芳蒋宜容
Owner SHAANXI XUEQIAN NORMAL UNIV
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