General method for preparing spherical porous metal oxide

A technology of porous metals and general methods, applied in chemical instruments and methods, preparation of oxides/hydroxides, chemical/physical processes, etc., can solve the problem of reducing the specific surface area of ​​materials, affecting the specific properties of active components, porous metal oxides There are few reports on the preparation of large spheres, etc.

Inactive Publication Date: 2006-12-27
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has at least two disadvantages: one is that the binder often blocks many pores, thereby reducing the specific surface area of ​​the material; the other is that the presence of the binder will affect the specific properties of the active component, such as the composition of the components. Unity, catalysis, etc.
However, there are few reports on the preparation of porous metal oxide macrospheres.

Method used

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  • General method for preparing spherical porous metal oxide
  • General method for preparing spherical porous metal oxide
  • General method for preparing spherical porous metal oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 10g of commercially available cation exchange resin D072 with a particle size of 500~700μm and 60mL of 10% ferrous chloride solution into the container, stir at room temperature for 8 hours to allow the resin to fully ion exchange, then filter and wash with distilled water until the filtrate is in the middle Sex; Add excess lye to the resin, stir at room temperature for 8 hours, filter, and wash with distilled water until the filtrate is neutral to obtain a resin-iron hydroxide composite. Place the composite in a 120℃ oven to dry for 2 hours, then transfer it to a muffle furnace, heat it up to 400℃ at a heating rate of 5~10℃ / min, keep it for 1 hour, continue to raise it to 550℃, keep it for 6 hours, turn off the power , Take it out after cooling to room temperature, and get porous metal iron oxide spheres with a diameter of 300~450μm and a specific surface area of ​​20.5m 2 / g, the pore volume is 0.26cm 3 / g, pore size distribution is 0.1~1.5μm and 2~16nm, apparent dens...

Embodiment 2

[0029] Add 10 g of a commercially available cation exchange resin D072 with a particle size of 500-700 μm and 70 mL of 10% aluminum nitrate solution to the container, stir at room temperature for 8 hours to fully ion exchange the resin, then filter, and wash with distilled water until the filtrate is neutral; Add excess lye to the resin, stir for 8 hours at room temperature, and filter to obtain a resin-aluminum hydroxide composite. Place the composite in an oven at 120°C to dry for 2 hours, then transfer it to a muffle furnace, heat it up to 800°C at a heating rate of 5-10°C / min, keep it warm for 6 hours, turn off the power supply, and take it out after cooling to room temperature. Large porous metal alumina ball with a diameter of 220~380μm and a specific surface area of ​​92.7m 2 / g, the pore volume is 0.23cm 3 / g, pore size distribution is 2~200nm, apparent density is 2.08g / cm 3, It is composed of 6-20nm pure γ-type alumina crystals.

Embodiment 3

[0031] Add 10g of a commercially available cation exchange resin D072 with a particle size of 500-700μm and 50mL of 10% titanium sulfate solution to the container, stir at room temperature for 8 hours to allow the resin to fully ion exchange, then filter and wash with distilled water until the filtrate is neutral; Add excess lye to the resin, stir at room temperature for 8 hours, filter, and wash with distilled water until the filtrate is neutral to obtain a resin-titanium hydroxide composite. Place the composite in an oven at 120°C to dry for 2 hours, then transfer it to a muffle furnace, heat it up to 600°C at a heating rate of 5-10°C / min, keep it warm for 6 hours, turn off the power supply, and take it out after cooling to room temperature. Large porous metal iron oxide sphere with a diameter of 350~500μm and a specific surface area of 173.5m 2 / g, the pore volume is 0.77cm 3 / g, the pore size distribution is 0.2~3.0μm and 2~20nm, the apparent density is 0.98g / cm 3 , Compose...

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Abstract

The invention discloses a universal method and utility of porous metal oxide and preparing method of organic spherical grain in the porous inorganic spherical grain preparing technological domain, which is characterized by the following: adopting ionic exchanging resin as mould; sedimenting complex compound or coordinate through acting metal salt and mould through alkali; drying; sintering to remove organic mould and carbon; synthesizing series of metal oxide ball with multi-size structure of iron scale, aluminium oxide, titanium oxide and cobalt oxide. The invention possesses high specific surface area, multi-size hole diameter, which displays important utility in the catalytic, adsorbing and spectrum domains.

Description

Technical field [0001] The invention belongs to the technical field of preparing porous inorganic spherical particles by using an organic spherical particle template, and particularly relates to a general method for preparing porous metal oxide spheres (from micrometer level to millimeter level) and uses thereof. Background technique [0002] Inorganic porous materials, characterized by a large specific surface area, have been widely used in actual production as catalysts, catalyst supports and adsorbents. According to the classification of the International Union of Pure and Applied Chemistry (IUPAC), those with a pore diameter below 2nm are called micropores, those with a pore diameter between 2-50nm are mesopores, and pores larger than 50nm are macropores. In practical applications, the micropores and mesoporous parts of porous materials contribute a lot to the specific surface area of ​​the material, making the material have more active centers compared with the bulk material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/18B01J32/00B01J35/04
Inventor 王维王木立王春红
Owner NANKAI UNIV
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