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Method for preparing large pore capacity, high specific surface area alumina

A technology of high specific surface area and alumina, which is applied in the preparation of alumina with large pore volume and high specific surface area, and in the field of activated alumina. The effect of simplicity, high specific surface area, and large pore volume

Inactive Publication Date: 2007-11-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of complex process, high specific surface area and large pore volume in the process of alumina preparation, the present invention provides a simple process for the preparation of activated alumina with both large pore volume and high specific surface area. method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 4.0g of β-cyclodextrin and 37.51g of aluminum nitrate and dissolve it in 100ml of ethylene glycol to make a mixed solution with a concentration of β-cyclodextrin of 0.035mol / L and an aluminum concentration of 1.0mol / L, and drop it into it under continuous stirring Add 0.1 mol / L ammonium carbonate aqueous solution until the pH value is 9.0, filter the resulting slurry, wash with deionized water, bake at 90°C for 6 hours, and bake at 650°C for 2 hours to obtain activated alumina. The main properties are listed in Table 1.

Embodiment 2

[0017] Weigh 8.0g of α-cyclodextrin and 37.51g of aluminum nitrate and dissolve it in 100ml of ethylene glycol to make a mixed solution with a concentration of α-cyclodextrin of 0.08mol / L and a concentration of aluminum of 1.0mol / L, and drop into it under constant stirring Add 0.1 mol / L ammonium carbonate aqueous solution until the pH value is 9.0, filter the resulting slurry, wash with deionized water, bake at 90°C for 6 hours, and bake at 650°C for 2 hours to obtain activated alumina. The main properties are listed in Table 1.

Embodiment 3

[0019] Weigh 3.3g gamma cyclodextrin and 18.75 g aluminum nitrate and dissolve in 500ml ethanol aqueous solution (the volume ratio of ethanol and water is 1:1), and make the concentration of gamma cyclodextrin 0.005mol / L and the concentration of aluminum 0.10mol / L Add a 0.1mol / L ammonium carbonate aqueous solution dropwise to the mixed solution under continuous stirring until the pH value is 9.0. The resulting slurry is filtered, washed with deionized water, baked at 90°C for 6 hours, and roasted at 650°C for 2 hours to obtain activated alumina. , and its main properties are listed in Table 1.

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Abstract

The preparation method for macroporous high specific surface area alumina to overcome the problems that process is complex, can not satisfy to both side of macropore and high specific surface area comprises: adding basic solution precipitant into mixed liquid contained aluminum salt and cyclodextrin, obtaining deposition; cleaning, drying, and hot calcining. The product has specific surface area in 220~480m2 / g and pore volume in 0.7~1.55ml / g, and can be used in drug and other indus..

Description

technical field [0001] The invention relates to a method for preparing activated alumina, especially alumina with large pore volume and high specific surface area, and belongs to the technical field of preparation of inorganic oxides. Background technique [0002] Alumina is an inorganic oxide widely used in industry. As a carrier, it is an important part of many catalysts. For example, aluminum oxide is used in the coating on the surface of honeycomb carrier in automobile exhaust catalytic purification catalyst. The carrier of hydrogenation refining catalyst in petrochemical process is alumina. Many hydrogenation reaction catalysts Alumina is also used as the carrier. In addition, alumina can also be used as an adsorbent and desiccant. Specific surface area and pore volume are two important parameters affecting the performance of alumina. There are many patented methods for the preparation of alumina with different pore volumes and different specific surface areas at hom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/04C01F7/02
Inventor 王来军文明芬宋崇立陈靖
Owner TSINGHUA UNIV