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Adsorbent and decomposer for indoor harmful formaldehyde gas

A harmful gas, formaldehyde adsorption technology, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of difficulty in popularization, waste, and high cost, and achieve the effects of reliable results, low cost, and simple methods.

Inactive Publication Date: 2004-09-01
郑春生 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of household electrical equipment has high air filtration efficiency, but the cost is also high. When the formaldehyde removal content reaches the standard, the electrical appliances are useless and discarded, resulting in waste and difficult to popularize.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] Preparation of formaldehyde gas adsorbent: prepare nano silicon dioxide, titanium dioxide or aluminum oxide emulsion by sol-gel method, and add a small amount of surfactant TPB, the powder is made of nano silicon dioxide, titanium dioxide or aluminum oxide After drying, burn it at 800-1100°C for 3-4 hours to activate it, cool it and keep it sealed for later use.

[0016] Preparation of formaldehyde gas decomposing agent: use commercially available peroxide to prepare a 5-10% solution. For example, dilute with commercially available 30% hydrogen peroxide to a 5-10% solution with deionized water. The powdered formaldehyde gas decomposing agent can be used directly with calcium peroxide or other peroxide solids.

[0017] Preparation of formaldehyde gas adsorption saturated color developer: Take 2 grams of hydroxylamine hydrochloride in 75 ml of absolute ethanol, add 5 ml of glycerin, and add 0.1 g of color developer at the same time, stir evenly, and pack it separately. ...

Embodiment 1

[0022] 200mL of 20% silicon dioxide nanoemulsion, 80mL of 10% hydrogen peroxide solution, and 14mL of formaldehyde color developer are mixed evenly and then sprayed. The validity period is 5 to 7 days.

[0023] Under normal circumstances, the smell of formaldehyde will be significantly reduced after 30 minutes of spraying, and it will reach saturation in about 24 to 72 hours, with a more obvious color change. When the color does not change, the indoor formaldehyde content is below the safe level (0.08mg / m 3 ). If there is a color change, the above process should be repeated.

Embodiment 2

[0025] 100 grams of silicon dioxide nano powder, 10 grams of sodium peroxide, and 10 mL of formaldehyde color developer, mix evenly and make it into a semi-wet state. Put it in handicrafts and plastic flowers (the position can be moved continuously), and the validity period is 15 to 30 days. , if there is no color change, the indoor formaldehyde content will be below the safe level (0.08mg / m 3 ). If there is a color change, the above process should be repeated.

[0026] In summary, formaldehyde adsorption and decomposing agents, including formaldehyde adsorbents, are nano-state activated silicon dioxide, titanium dioxide or aluminum oxide emulsions, formaldehyde decomposing agents are peroxides contained in emulsions, and formaldehyde develops color. The reagent is prepared from hydroxylamine hydrochloride and color developer. When in use, the developer can be mixed with the formaldehyde adsorption and decomposition agent, or dropped into the formaldehyde adsorption and degr...

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Abstract

The invention discloses an absorbing-decomposing agent of indoor harmful formaldehyde gas, its formula using active SiO2, TiO2 or Al2O3 as sorbent, peroxide as decomposer and indicating absorbing and decomposing degree of formaldehyde through the color change of the indicators such as methyl yellow, fuchsin and bromophenol blue. It adopts the mixed emulsion or powder of formaldehyde sorbent and decomposer, mixes in formaldehyde- absorbing saturated developer, and then sprays the mixture on indoor decorations or blends the mixture in indoor decorations, quickly absorbing and decomposing formaldehyde gas into harmless matters, and the decomposer after decomposing formaldehyde gas also produces harmless matters to living environment, without secondary pollution. Its formula is simple and its operation is convenient and its price is low.

Description

technical field [0001] The invention relates to an adsorption and decomposition agent for harmful gases, in particular to an adsorption and decomposition agent for formaldehyde that can quickly absorb and decompose formaldehyde gas and indicate the degree of adsorption and decomposition of formaldehyde through color changes. Background technique [0002] Since modern people spend more than 92% of their time indoors, the harm of indoor volatile organic compounds (VOD) to human health has become a research hotspot. Among them, formaldehyde, which is potentially carcinogenic, has attracted more and more attention. With the rise of home decoration, the extensive use of decoration materials will inevitably cause indoor air pollution, and formaldehyde is one of the harmful gases. Formaldehyde is a colorless, soluble, irritating gas that can be absorbed through the respiratory tract. According to epidemiological surveys, people in non-industrial environments (such as indoor reside...

Claims

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Application Information

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IPC IPC(8): B01D53/04B01D53/14B01D53/72B01D53/80
Inventor 郑春生王建清宋海燕
Owner 郑春生
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