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Formaldehyde absorbing material

A formaldehyde absorption and particle technology, applied in the chemical industry, can solve problems such as low absorption efficiency, and achieve the effect of improving efficiency and increasing contact area.

Active Publication Date: 2014-01-08
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Activated carbon is often used as a formaldehyde absorption material, mainly through physical adsorption to reduce the concentration of formaldehyde in the air, and the absorption efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 1 gram of strongly hydrophobic calcium carbonate particles with a contact angle of 110° (calcium carbonate particles hydrophobically modified by a silane coupling agent) into 0.5 grams of a tannin aqueous solution with a mass concentration of 0.05%, at a rate of 12000 rpm Stir and disperse for 1 minute to obtain a formaldehyde-absorbing material having a water-in-air structure.

[0018] In this embodiment, every gram of formaldehyde-absorbing material can absorb 4.2 mg of formaldehyde.

Embodiment 2

[0020] This embodiment is the same as embodiment 1, wherein the difference is that the solid particles used are silicon dioxide particles, talcum particles, aluminum oxide particles, zinc oxide particles, titanium dioxide particles, montmorillonite particles, hydrotalcite particles, fly ash particles, diatomaceous earth particles, mica particles, attapulgite particles or zeolite particles, or silica particles, calcium carbonate particles, talc particles, alumina particles, zinc oxide particles, titanium dioxide particles, montmorillonite particles, hydrotalcite particles , fly ash particles, diatomite particles, mica particles, attapulgite particles and zeolite particles; Acid hydrazine, ammonium sulfate, ammonium molybdate, glycine, acrylic hydrazine polymer compound, polyacrylamide, hydroxyethyl cellulose, hexamethylenetetramine, copper sulfate, copper chloride, zinc chloride , copper nitrate, silver nitrate or ferric chloride, or tannin, urea, sodium sulfite, sodium bisulfi...

Embodiment 3

[0023] Add 1 gram of strongly hydrophobic montmorillonite particles with a contact angle of 120° (montmorillonite particles hydrophobically modified by long-chain fatty acids) into 30 grams of urea aqueous solution with a mass concentration of 20%, at a rate of 1000 rpm Stir and disperse for 30 minutes to obtain a dry water fire extinguishing agent with a water-in-gas structure.

[0024] In this embodiment, every gram of formaldehyde-absorbing material can absorb 9.8 mg of formaldehyde.

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PUM

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Abstract

The invention discloses a formaldehyde absorbing material which is formed by high-hydrophobicity solid particles and aqueous solutions in a high-speed stirring mixing mode. The stirring speed of high-speed stirring operation is 1000 turns per minute to 12000 turns per minute and the stirring time is 1 minute to 30 minutes. According to the formaldehyde absorbing material, the high-hydrophobicity solid particles are adopted so as to be mixed with the aqueous solutions of substances capable of making a chemical reaction with formaldehyde, after the high-hydrophobicity solid particles and the aqueous solutions are stirred and dispersed at a high speed, the formaldehyde absorbing material of an air pocket water type structure is obtained, the formaldehyde can be absorbed by a solid shell of the material, the aqueous solutions contained in the shell can absorb the formaldehyde as well, a chemical reaction can be conducted between solute in the aqueous solutions and the formaldehyde, and therefore the formaldehyde absorbing efficiency is high. According to the formaldehyde absorbing material, the high-hydrophobicity solid particles and the aqueous solutions are mixed so that the air pocket water type structure can be formed, the contact area between the aqueous solutions and air can be increased, and therefore the formaldehyde absorbing efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a formaldehyde absorbing material. Background technique [0002] Formaldehyde has a strong stimulating effect on the skin, eyes and respiratory tract, and has an anesthetic effect on the central nervous system. Formaldehyde coagulates proteins, is genotoxic to humans, and is also a mutagen. Low concentrations of formaldehyde can cause damage to the respiratory tract, and long-term exposure may damage the health of the respiratory system. Formaldehyde is also carcinogenic. Due to the use of artificial boards, wallpapers, foam plastics and other materials in newly decorated rooms, the indoor formaldehyde concentration is mostly higher than the national standard. [0003] Activated carbon is often used as a formaldehyde absorbing material, mainly through physical adsorption to reduce the concentration of formaldehyde in the air, and the absorption efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/30A62D101/28
Inventor 贺拥军
Owner XIAN UNIV OF SCI & TECH
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