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Formaldehyde gas oxidation catalyst under room temperature

A formaldehyde gas and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of complex raw material preparation methods and high technical requirements, and achieve the Low cost of raw materials, less dosage and convenient operation

Active Publication Date: 2008-01-09
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These catalysts are mainly based on TiO 2 Nano powder or thin film is used as photocatalyst, the raw material preparation method is complicated, the technical requirements are high, and nano photocatalyst needs specific excitation light source

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dissolve 100 grams of manganese nitrate in a certain amount of water, adjust the pH of the solution to 12-13 with sodium hydroxide solution under stirring, gradually add sodium hypochlorite solution according to the molar ratio of manganese nitrate and sodium hypochlorite of 2-3, and let it stand overnight. The precipitate was filtered and rinsed with deionized water. Wash until no chloride ions are detected in the filtrate with silver nitrate solution. Dry the precipitate at 70°C for later use. The dried precipitate was immersed in 1% Pt solution. Dry at 70°C after rotary evaporation. Sieve the dried catalyst into 40-60 mesh granules for later use.

Embodiment 2

[0018] Dissolve 100 grams of nickel nitrate in a certain amount of water, adjust the pH of the solution to 12-13 with sodium hydroxide solution under stirring, gradually add sodium hypochlorite solution according to the molar ratio of nickel nitrate to sodium hypochlorite of 2-3, and let it stand overnight. The precipitate was filtered and rinsed with deionized water. Wash until no chloride ions are detected in the filtrate with silver nitrate solution. Dry the precipitate at 70°C for later use. The dried precipitate was immersed in 1% Au solution. Dry at 70°C after rotary evaporation. Sieve the dried catalyst into 40-60 mesh granules for later use.

Embodiment 3

[0020] Dissolve 100 grams of nickel nitrate in a certain amount of water, adjust the pH of the solution to 12-13 with sodium hydroxide solution under stirring, gradually add sodium hypochlorite solution according to the molar ratio of nickel nitrate to sodium hypochlorite of 2-3, and let it stand overnight. The precipitate was filtered and rinsed with deionized water. Wash until no chloride ions are detected in the filtrate with silver nitrate solution. Dry the precipitate at 70°C for later use. The dried precipitate was immersed in 0.5% Au-0.5% Pd solution. Dry at 70°C after rotary evaporation. Sieve the dried catalyst into 40-60 mesh granules for later use.

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Abstract

The present invention provides a kind of formaldehyde gas oxidizing catalyst for room temperature use. Metal oxide is first obtained with soluble metal nitrate, carbonate or other inorganic salt and through oxidation and precipitation; and then loaded with small amount of metal to form the catalyst with room temperature formaldehyde oxidizing activity. The catalyst has metal oxide as main body and supported noble metal as active component, and features that the metal oxide may be oxide of Al, Ni, Mn, Si or Fe, and the noble may be Pt, Ru, Au, Rh or Pd. The catalyst of the present invention has high catalytic activity, and long sustaining time. The catalyst has formaldehyde converting rate up to 100 %, and results in low power consumption.

Description

technical field [0001] The invention is used for oxidizing formaldehyde gas at room temperature, and can oxidize formaldehyde gas into carbon dioxide and water at room temperature. technical background [0002] Formaldehyde is a typical indoor environmental pollutant. A variety of interior decoration materials, such as furniture paint, wallpaper, plastic floors, chemical fiber carpets, doors and windows, etc., may release formaldehyde into the room. The release of formaldehyde in the environment can last for several years, seriously damaging human health. Studies have shown that long-term exposure to low concentrations of formaldehyde (0.017mg / m 3 ~0.068mg / m 3 ), although the intensity of the symptoms caused is weak, but the symptoms are consistent with the acute effects of formaldehyde. [0003] At present, various air purifiers mainly use the strong adsorption of activated carbon to adsorb pollutants such as formaldehyde. Commonly used porous carbon materials include ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/40B01D53/86B01D53/72
Inventor 贺泓石晓燕张长斌
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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