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Polymeric adsorbent for removing formaldehyde and preparation method thereof

A technology for removing formaldehyde and adsorbing resins, applied in chemical instruments and methods, and other chemical processes, can solve the problems of short adsorption period and achieve low overall cost, significant social and environmental benefits, and high formaldehyde adsorption.

Inactive Publication Date: 2012-12-19
SHANGHAI YIHE ENVIRONMENTAL PROTECTION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of adsorbent can quickly reduce the indoor formaldehyde concentration, but the effective period of adsorption is short, and it often fails after a few days

Method used

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  • Polymeric adsorbent for removing formaldehyde and preparation method thereof
  • Polymeric adsorbent for removing formaldehyde and preparation method thereof
  • Polymeric adsorbent for removing formaldehyde and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] a. Mix 21g of melamine with 33g of polyacryloyl chloride (molecular weight: about 1000), and control it under 20°C for 0.5 hours of ultrasonic treatment to obtain a uniformly mixed slurry;

[0047] b. React the above-mentioned slurry at 60°C for 3 hours under stirring to obtain a pre-crosslinked thick slurry;

[0048] c. Mix 200mL of o-dichlorobenzene, 120mL of xylene, and 12g of linear polystyrene with a molecular weight of 50,000 as the oil phase, and add 30g of the pre-crosslinked thick slurry obtained in step (b) into the oil phase and mix to control polymerization The temperature was 90°C, the reaction was stirred for 8 hours, suction filtered and soaked in methanol, and then washed with water to obtain 43 g of gel resin beads;

[0049]d. Measure 20 g of the gel resin beads obtained in step (c) and pack into an ion-exchange column, elute with 500 grams of 0.5mol / L hydrochloric acid aqueous solution, and then wash with water until nearly neutral, and formaldehyde is...

Embodiment 2

[0052] a. 28g of melamine was mixed with 12g of tetraethylenepentamine and 65g of phthalic anhydride, and ultrasonically treated for 0.5 hours below 20 degrees to obtain a uniformly mixed slurry;

[0053] b. Control the above-mentioned treated slurry at about 40°C and stir for 4 hours to obtain a pre-crosslinked thick slurry;

[0054] Step (c) is changed to control the polymerization temperature at 70°C, and stir the reaction for 14 hours.

[0055] Step (d) is the same as in Example 1.

Embodiment 3

[0057] Steps b, c, and d are the same as in Example 2; step a is changed to 30 g of melamine and 10 g of triethylenetetramine, the crosslinking agent is 40 g of glutaraldehyde, and 50 mL of N,N-dimethylformamide is added as a solvent at the same time. Others are with embodiment 2.

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Abstract

The invention discloses a polymeric adsorbent for removing formaldehyde and a preparation method and applications of the polymeric adsorbent. The preparation method is to prepare the cross-linked melamine resin based on the property of the melamine that primaquine is contained and the periodic acid Schiff reaction can be carried out with the formaldehyde. The polymeric adsorbent is uniform in structure and is capable of achieving the purpose of absorbing the formaldehyde with a high adsorption quantity by absorbing through a hydrogen bond, enriching formaldehyde molecules, and carrying out the periodic acid Schiff reaction with the formaldehyde. The polymeric adsorbent has high absorption quantity of the formaldehyde, and is not needed to be regenerated frequently, so that the total cost is low. The polymeric adsorbent for absorbing the formaldehyde is beneficial for treating the pollution of the formaldehyde in a room and purifying the wastewater with formaldehyde contained. The polymeric adsorbent for removing the formaldehyde has the chemical structure shown as follows.

Description

technical field [0001] The invention relates to a cross-linked melamine adsorption resin as well as a preparation method and application. Background technique [0002] Formaldehyde is an irritating gas, which mainly stimulates the respiratory tract and causes abnormal lung function. Long-term exposure can cause emphysema and cancer. In the "Carcinogenic Bulletin" released by the International Cancer Research Center (iARC) in 2004, formaldehyde was listed as a "clear carcinogen". The smell of formaldehyde is not big, and the olfactory stimulation is limited. When people walk into a newly renovated room, the pungent smell they smell is mainly the smell of isocyanate, free ammonia, benzene, etc., but the smell of formaldehyde is covered by these smells, and it is generally not smellable. [0003] Indoor formaldehyde mainly comes from the artificial boards used for decoration. Adhesives commonly used for wood-based panels are urea-formaldehyde resins, phenolic resins and mela...

Claims

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Application Information

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IPC IPC(8): C08G69/26C08G12/32B01J20/30B01J20/26
Inventor 赵双盘李永胜左玉云
Owner SHANGHAI YIHE ENVIRONMENTAL PROTECTION MATERIAL
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