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Formaldehyde adsorbent and formaldehyde adsorbent preparation method

A formaldehyde adsorption and chloroformyl technology, which is applied in the field of air purification, can solve the problems of easy failure of formaldehyde adsorbents, and achieve the effects of stable products, good adsorption performance, and long penetration time

Inactive Publication Date: 2019-01-11
汤美英
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydrogen peroxide is easily decomposed, resulting in the failure of the formaldehyde adsorbent prepared by this preparation method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of formaldehyde adsorbent, comprising the following steps:

[0036] 1) 1 mass part of 2-imidazolidinone, 1 mass part of ammonium dihydrogen phosphate, 0.1 mass part of sodium dodecylbenzenesulfonate, 97.8 mass parts of water, and 0.1 mass part of aloe extract are uniformly mixed to obtain the active component dipping solution;

[0037] 2) Slowly add 500g of columnar activated carbon carrier with a diameter of 4mm into the container containing the active component impregnation solution for 2 hours at room temperature, and the volume ratio of the carrier to the active component impregnation solution is 1:0.5;

[0038] 3) Take out the impregnated carrier and dry it, then put it into an oven for drying, the drying temperature is 60° C., and the drying time is 1 hour. The product taken out is the formaldehyde adsorbent.

Embodiment 2

[0040] A preparation method of formaldehyde adsorbent, comprising the following steps:

[0041] 1) 5 parts by mass of 2-imidazolidinone, 5 parts by mass of ammonium dihydrogen phosphate, 0.1 part by mass of sodium dodecylbenzenesulfonate, 89.8 parts by mass of water, and 0.1 part by mass of aloe extract are uniformly mixed to obtain the active component dipping solution;

[0042] 2) Slowly add 500 g of spherical MCM-41 zeolite molecular sieve carriers with a diameter of 3 to 4 mm into the container containing the active component impregnation solution at room temperature and soak for 8 hours. The volume ratio of the carrier to the active component impregnation solution is 1:5;

[0043] 3) Take out the impregnated carrier and dry it in the air, then put it into an oven for drying, the drying temperature is 100° C., and the drying time is 5 hours. The product taken out is the formaldehyde adsorbent.

Embodiment 3

[0045] A preparation method of formaldehyde adsorbent, comprising the following steps:

[0046] 1) 5 parts by mass of 1-chloroformyl-2-imidazolidinone, 5 parts by mass of ammonium dihydrogen phosphate, 0.1 parts by mass of sodium dodecylbenzenesulfonate, 89.8 parts by mass of water, and 0.1 parts by mass of aloe extract Mix evenly to obtain active component impregnation solution;

[0047] 2) Slowly add 500 g of a spherical silica carrier with a diameter of 1 to 2 mm into the container containing the active component impregnation solution at room temperature and soak for 8 hours. The volume ratio of the carrier to the active component impregnation solution is 1:5;

[0048] 3) Take out the impregnated carrier and dry it in the air, then put it into an oven for drying, the drying temperature is 100° C., and the drying time is 5 hours. The product taken out is the formaldehyde adsorbent.

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Abstract

The invention relates to a formaldehyde adsorbent, the formaldehyde adsorbent comprises a carrier and an active component loaded on the carrier, the active component comprises ethyleneurea or its derivative, and ammonium phosphate; the mass ratio of the ethyleneurea or its derivative to ammonium phosphate is 1 to 20:1 to 20. The formaldehyde adsorbent of the invention has stable active componentsand high adsorption efficiency. The invention also relates to a preparation method of the formaldehyde adsorbent.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular to a formaldehyde adsorbent and a preparation method of the formaldehyde adsorbent. Background technique [0002] Formaldehyde is a colorless irritating gas and is one of the common pollutants in the air indoors and in cars. It often exists in plywood containing urea-formaldehyde resin, including particle board, hardwood plywood paneling, and medium-density fiberboard. The latter has the highest formaldehyde content. Formaldehyde is irritating to the eyes and nose, and long-term exposure may induce cancer. [0003] At present, loose and porous materials are mostly used as formaldehyde adsorbents at home and abroad, among which activated carbon and its modified products are the most in-depth research. Formaldehyde adsorbents are divided into physical adsorbents and chemical adsorbents. Physical adsorbents mainly include activated carbon, nitric acid modified activated carb...

Claims

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Application Information

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IPC IPC(8): B01D53/02B01D53/72B01D53/81B01J20/08B01J20/10B01J20/16B01J20/30
CPCB01D53/02B01D53/72B01D53/81B01J20/08B01J20/103B01J20/165
Inventor 汤美英
Owner 汤美英
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