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Preparation method of gamma-Al2O3 adsorbent

An adsorbent and hexagonal columnar technology, which is applied in the field of preparation of hexagonal columnar micron-sized γ-Al2O3 particles, can solve problems such as the adsorption performance of recycling alumina materials that are not mentioned, and achieve mild hydrothermal conditions, simple process, and cheap raw materials Effect

Inactive Publication Date: 2016-08-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the above methods mentioned the recycling adsorption performance of the prepared alumina material to Congo red dye.

Method used

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  • Preparation method of gamma-Al2O3 adsorbent

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Embodiment 1

[0026] First, 4.74g KAl(SO 4 ) 2 12H 2 O (0.01mol) and 2.45g CH 3 COOK (0.025mol) was stirred and dissolved in 70mL of distilled water to form a homogeneously mixed transparent solution. Then, the solution was transferred to a polytetrafluoroethylene-lined hydrothermal kettle, and reacted at 180° C. for 24 hours to obtain a reaction product. Naturally cool the reaction product to room temperature, centrifuge (8000r / min, 3min), wash three times with distilled water, disperse and wash once with absolute ethanol and centrifuge (8000r / min, 3min), and put the obtained white filter cake at 80°C Vacuum drying for 10h, and sintering at 550°C for 4h in a static air atmosphere, the phase of the sample obtained is γ-Al 2 o 3 , and its morphology is irregular lumpy particles (see figure 1 ). Add 100mg of the above γ-Al to 100ml, 500mg / L Congo red solution 2 o 3 , placed in a constant temperature oscillation box, set the temperature at 25°C, and the oscillation rate at 150r / min, ...

Embodiment 2

[0028] First, 0.28g PSS, 2.41g AlCl 3 ·6H 2 O (0.01mol) and 2.45g CH 3 COOK (0.025mol) was stirred and dissolved in 70mL of distilled water to form a homogeneously mixed transparent solution. Then, the solution was transferred to a polytetrafluoroethylene-lined hydrothermal kettle, and reacted at 180° C. for 24 hours to obtain a reaction product. Naturally cool the reaction product to room temperature, centrifuge (8000r / min, 3min), wash three times with distilled water, disperse and wash once with absolute ethanol and centrifuge (8000r / min, 3min), and vacuum the obtained white precipitate at 80°C Drying for 10 hours, and calcining for 4 hours in a static air atmosphere at 550°C, the phase of the sample obtained is γ-Al 2 o 3 , whose morphology is characterized by hexagonal columnar micron-sized particles with a length and width of about 1 μm, a height of about 1-2 μm, and a relatively smooth surface (see figure 2 ).

[0029] Add 100mg of the above γ-Al to 100ml, 500mg / L...

Embodiment 3

[0031] First, 1g PEG2000, 2.41g AlCl 3 ·6H 2 O (0.01mol) and 2.45g CH 3 COOK (0.025mol) was stirred and dissolved in 70mL of distilled water to form a homogeneously mixed transparent solution. Then, the solution was transferred to a polytetrafluoroethylene-lined hydrothermal kettle, and reacted at 180° C. for 24 hours to obtain a reaction product. Naturally cool the reaction product to room temperature, centrifuge (8000r / min, 3min), wash three times with distilled water, disperse and wash once with absolute ethanol and centrifuge (8000r / min, 3min), and vacuum the obtained white precipitate at 80°C Drying for 10 hours, and calcining for 4 hours in a static air atmosphere at 550°C, the phase of the sample obtained is γ-Al 2 o 3 , whose morphology is characterized by hexagonal columnar micron-sized particles with a length and width of about 1 μm, a height of about 1-2.5 μm, and a rough surface (see image 3 ).

[0032] Add 100mg of the above-mentioned adsorbent to 100ml, 50...

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Abstract

The invention relates to a preparation method of a gamma-Al2O3 adsorbent, in particular to a preparation method of a hexagonal columnar micron-scale gamma-Al2O3 adsorbent with controllable particle size. The preparation method comprises the following steps: one of PSS, PEG 2000 or a Pluronic block copolymer, one of aluminum potassium sulfate and aluminum chloride as well as potassium acetate are dissolved in distilled water sequentially, uniformly and sufficiently stirred and subjected to hydro-thermal treatment, a hydro-thermal product is cooled naturally, separated, washed, dried in vacuum and roasted, hexagonal columnar micron-scale gamma-Al2O3 particles with remarkably accelerated adsorption kinetics on azo dye Congo red and excellent adsorption property are prepared, and the particle size of the hexagonal columnar micron-scale gamma-Al2O3 particles is changed in the length range of 1-2 mu m and in the height range of 2-3 mu m. The preparation method has the remarkable advantages that the raw materials are cheap, the preparation process is simple, reaction conditions are mild, the particle size of the product is controllable in a certain range, the adsorption of Congo red is excellent and the like, and the absorbent can be recycled.

Description

technical field [0001] The invention relates to alumina used in the field of environmental purification, in particular to a hexagonal columnar micron-sized γ-Al with controllable particle size 2 o 3 The preparation method of the particle; when it is used as an adsorbent to adsorb the azo dye Congo red, its adsorption kinetics is significantly accelerated, and the adsorbent for adsorbing the Congo red can be regenerated and recycled after being desorbed by a roasting method. Background technique [0002] In the printing and dyeing industry, the discharge of printing and dyeing wastewater will not only affect the growth of aquatic organisms, destroy the ecological balance of water, but also endanger human health. At present, azo dyes account for 80% of the dyes used in the world. Congo red is a typical benzidine direct azo dye. It has a high loss rate during production and use, easily enters water bodies, and has a damaging effect on the ecological environment. . Congo red ...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/30C01F7/02C02F1/28C02F1/58
CPCB01J20/08B01J2220/42B01J2220/4806B01J2220/4812C01F7/02C02F1/281C02F2101/308
Inventor 蔡卫权王文旋
Owner WUHAN UNIV OF TECH
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