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Preparation method of high specific surface area mesoporous alumina

A mesoporous alumina, high specific surface area technology, used in alumina/hydroxide preparation, chemical instruments and methods, aluminum compounds, etc., can solve the problems of poor alumina porosity and specific surface area, and achieve porosity The effect of improving, enriching pores, and increasing specific surface area

Active Publication Date: 2018-11-23
CHINA HYDROGEN ENERGY SCI & TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: aiming at the problem of poor porosity and specific surface area of ​​traditional alumina, a preparation method of mesoporous alumina with high specific surface area is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Mix glucose and water in a beaker at a mass ratio of 1:25, and add potassium iodate 0.2 times the mass of glucose to the beaker, and stir and mix for 12 hours at a temperature of 40°C and a rotational speed of 350r / min. Glucose mixture, mix the glucose mixture with 12% barium chloride solution in a mass ratio of 1:5, stir and mix for 90 minutes at a temperature of 40℃ and a rotation speed of 400r / min, and then filter to obtain Filtrate, mix the filtrate with 20% sodium sulfate solution at a mass ratio of 1:4, stir and mix for 80 minutes at a temperature of 40°C and a speed of 400r / min, and then filter to obtain a modified glucose mixture ; Mix the polyallylamine with water at a mass ratio of 1:110, at a temperature of 35°C and a rotation speed of 400r / min, stir and mix for 60 minutes, then use 15% sodium hydroxide solution to adjust the polyallylamine The pH of the mixture with water is 10.0 to obtain the polyallylamine solution. Under the condition of rotating speed of ...

example 2

[0023] Mix glucose and water in a beaker at a mass ratio of 1:25, and add potassium iodate 0.2 times the mass of glucose to the beaker, and stir and mix for 12 hours at a temperature of 40°C and a rotational speed of 350r / min. Glucose mixture, mix the glucose mixture with 12% barium chloride solution in a mass ratio of 1:5, stir and mix for 90 minutes at a temperature of 40℃ and a rotation speed of 400r / min, and then filter to obtain Filtrate, mix the filtrate with 20% sodium sulfate solution at a mass ratio of 1:4, stir and mix for 80 minutes at a temperature of 40°C and a speed of 400r / min, and then filter to obtain a modified glucose mixture ; Mix the polyallylamine with water at a mass ratio of 1:110, at a temperature of 35°C and a rotation speed of 400r / min, stir and mix for 60 minutes, then use 15% sodium hydroxide solution to adjust the polyallylamine The pH of the mixture with water is 10.0 to obtain the polyallylamine solution. Under the condition of rotating speed of ...

example 3

[0025] Mix glucose and water in a beaker at a mass ratio of 1:25, and add potassium iodate 0.2 times the mass of glucose to the beaker, and stir and mix for 12 hours at a temperature of 40°C and a rotational speed of 350r / min. Glucose mixture, mix the glucose mixture with 12% barium chloride solution in a mass ratio of 1:5, stir and mix for 90 minutes at a temperature of 40℃ and a rotation speed of 400r / min, and then filter to obtain Filtrate, mix the filtrate with 20% sodium sulfate solution at a mass ratio of 1:4, stir and mix for 80 minutes at a temperature of 40°C and a speed of 400r / min, and then filter to obtain a modified glucose mixture ; Mix the polyallylamine with water at a mass ratio of 1:110, at a temperature of 35°C and a rotation speed of 400r / min, stir and mix for 60 minutes, then use 15% sodium hydroxide solution to adjust the polyallylamine The pH of the mixture with water is 10.0 to obtain the polyallylamine solution. Under the condition of rotating speed of ...

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Abstract

The invention discloses a preparation method of high specific surface area mesoporous alumina, belonging to the technical field of preparation of porous inorganic materials. The preparation method comprises the steps of mixing pretreated gel dispersion liquid with an aluminum nitrate solution with a mass fraction of 15-20% in a four-mouth flask, wherein the mass ratio of the pretreated gel dispersion liquid to the aluminum nitrate solution is equal to (5 to 2)-(8 to 2); adding an ammonium carbonate solution with a mass fraction of 25-30% into the four-mouth flask under the conditions that thetemperature is 30-40 DEG C and the rotating speed is 280-400r / min, wherein the adding amount of the ammonium carbonate solution is 0.2-0.5 time of the pretreated gel dispersion liquid; stirring and mixing for 2-3h, and filtering to obtain pretreated blank; drying the pretreated blank for 1-2h at the temperature of 70-80 DEG C to obtain blank; calcining the blank to obtain the high specific surfacearea mesoporous alumina. The obtained high specific surface area mesoporous alumina has excellent porosity and specific surface area.

Description

Technical field [0001] The invention discloses a method for preparing high specific surface area mesoporous alumina, which belongs to the technical field of porous inorganic material preparation. Background technique [0002] Mesoporous materials have a large specific surface area, pore volume, and controllable pore size distribution. They are widely used in adsorption, filtration, catalysis and other fields. Mesoporous alumina (MA) is made of γ-Al with higher activity. 2 O 3 Composition, large specific surface area, good adsorption, good stability, often used as adsorbent, catalyst and catalyst carrier. There are literatures that γ-Al 2 O 3 The price is relatively low, the preparation is relatively simple, and it can selectively absorb ions. It does not react with the reaction gas and can improve the anti-toxicity of the catalyst when it is used as a catalyst carrier. Therefore, it has attracted great attention in the industry and research fields. [0003] Mesoporous bulk materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/30B01J20/08B01J20/30
CPCB01J20/08C01F7/308C01P2006/12C01P2006/17
Inventor 邹峰刘侠朱东东
Owner CHINA HYDROGEN ENERGY SCI & TECH DEV CO LTD