Free formaldehyde eliminating agent and its prepn process

A free formaldehyde and eliminating agent technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, can solve the problems of high cost and low elimination rate of free formaldehyde, and achieve harm elimination, convenient use, and high elimination efficiency. Effect

Inactive Publication Date: 2004-09-08
黄元銮
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Published Chinese patent application: application number 01140051 discloses formaldehyde scavenger and its production process, its shortcoming is that the elimination rate of free formaldehyde is low
And the disclosed Chinese patent application: application number 02138527 disclosed formaldehyde scavenger and preparation method thereof, its shortcoming is that cost is high

Method used

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Examples

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preparation example Construction

[0019] The preparation method step of free formaldehyde scavenger is described below:

[0020] 1. Put water, stearamide, sulfuric acid, and sodium polyacrylate into the reaction kettle, stir while heating, control the temperature at 30-60°C, and keep the reaction for 1-3 hours.

[0021] 2. Add nonylphenol ethoxylate, control the stirring speed at 200-300 rpm, and stir for about 30 minutes.

[0022] 3. Finally, dilute sulfuric acid is added to adjust the pH to about 5, and the reaction material is cooled to room temperature, and then filtered and packaged to obtain the finished product.

[0023] Each component weight percentage is respectively in above-mentioned three steps:

[0024] Water: 85~95%

[0025] Stearamide: 5~20%

[0026] Sulfuric acid: 0.1~5%

[0027] Sodium polyacrylate: 0.1~3%

[0028] Nonylphenol ethoxylate: 0.5-12%

Embodiment 1

[0030] In 100 parts of water in this example, add 8 parts of stearamide, 0.5 part of sulfuric acid, 0.5 part of sodium polyacrylate, and 0.6 part of nonylphenol ethoxylate, and stir and react under the condition of 30-60 °C, and keep warm for 1-3 Hours later, the finished product can be obtained by filtration, a colorless and transparent free formaldehyde scavenger.

Embodiment 2

[0032] In 100 parts of water in this example, 10 parts of stearamide, 2 parts of sulfuric acid, 1 part of sodium polyacrylate, and 3 parts of nonylphenol ethoxylate were added respectively, and stirred and reacted at 30-60°C, and kept warm for 1-3 Hours later, the finished product can be obtained by filtration, a colorless and transparent free formaldehyde scavenger.

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PUM

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Abstract

The present invention is free formaldehyde eliminating agent and its preparation process. The free formaldehyde eliminating agent consists of water, stearamide, sulfuric acid, polysodium acrylate, nonyl phenol oxethyl compound, etc. and is prepared through synthesis under heating condition. When the free formaldehyde eliminating agent in 1 % is added into free formaldehyde solution of 10 ppm concentration, the free formaldehyde eliminating rate may reach 76 % in 10 min. The free formaldehyde eliminating agent is colorless, non-toxic, smell-less and suitable for use in eliminating free formaldehyde in household fitment and production of plywood and paint.

Description

technical field [0001] The invention relates to a free formaldehyde eliminating agent and a preparation method thereof. Background technique [0002] According to authoritative data, plywood, blockboard, medium density fiberboard and particle board, etc., which are commonly used for interior decoration, use urea-formaldehyde resin as the main component of the adhesive used, and the residual free formaldehyde in the board will gradually release to the surrounding environment. It is the main body of indoor air pollution, and other various decorative materials that contain formaldehyde and may emit to the environment, such as wall stickers, chemical fiber carpets, foam plastics, paints and plastics. In response to the above situation, the state has promulgated 10 limit standards for harmful substances in interior decoration materials to regulate production and control pollution. However, the man-made panels on the market are mixed with genuine ones. According to the results of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/72
Inventor 黄元銮
Owner 黄元銮
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