Methyl aldehyde adsorbing substance and preparation method thereof

A technology for formaldehyde adsorption and formaldehyde, which is applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of low molecular weight of formaldehyde, poor purification effect, poor purification effect, etc., and achieve improved adsorption performance, The effect of promoting adsorption and improving purification efficiency

Active Publication Date: 2009-07-01
718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low molecular weight and strong polarity of formaldehyde, it is difficult to physically remove it through activated carbon, and the purification effect is poor.
Although there are currently some modified activated carbons on the market for purifying formaldehyde, such as sodium thiosulfate, potassium permanganate and other modified activated carbon adsorbents, although the performance of ordinary activated carbon adsorbents can be improved by 1 to 2 times, but still up to Less than expected purification effect

Method used

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  • Methyl aldehyde adsorbing substance and preparation method thereof
  • Methyl aldehyde adsorbing substance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 11ml of polyethylene polyamine polymer with a molecular weight of 1800 and a concentration of 18% was fully mixed with 0.1ml of polyethylene glycol, and then diluted with 50ml of deionized water to prepare a formaldehyde reactant for future use. Take 70g of carbon molecular sieve, and bake it at a constant temperature of 150°C for 3 hours for pretreatment, in order to ensure that the formaldehyde reactant is more evenly loaded on the matrix material. Add the pretreated carbon molecular sieve to the formaldehyde reactant, keep the temperature at 70°C, rotate at 300rpm, and stir and impregnate for 5 hours. At this time, the formaldehyde reactant enters the internal pores of the carbon molecular sieve by natural diffusion and physically deposits on the matrix material. The formaldehyde adsorbent based on carbon molecular sieve is obtained by vacuum drying at 75° C., and the adsorption capacity of the adsorbent to formaldehyde is 0.4 mmol / g.

Embodiment 2

[0023] 13ml of polyethylene polyamine polymer with a molecular weight of 8000 and a concentration of 30% was fully mixed with 0.2ml of polyethylene glycol, and diluted with 20ml of deionized water to prepare a formaldehyde reactant. Take 20g of coal-based activated carbon, bake it at a constant temperature of 150°C for 4 hours for pretreatment, add it to the formaldehyde reactant, keep the temperature at 80°C, rotate at 150rpm, stir and impregnate for 5 hours, and then vacuum dry at 50°C to obtain formaldehyde adsorption with activated carbon particles as the matrix. agent, the adsorption capacity of formaldehyde is 1.5mmol / g.

Embodiment 3

[0025] Mix 20ml of polyethylene polyamine polymer with a molecular weight of 50,000 and a concentration of 20% with 0.5ml of polyethylene glycol, add 10ml of deionized water to dilute, and set aside. Take 6g of adsorption resin, wash it several times with deionized water, dry it by centrifugation, add it to the spare formaldehyde reactant, keep the temperature at 60°C, rotate at 100rpm, stir and impregnate for 12 hours, then vacuum dry at 45°C to obtain the adsorption resin as the matrix Formaldehyde adsorbent, the adsorption capacity of formaldehyde is 3.9mmol / g.

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Abstract

The invention relates to a formaldehyde adsorbent and a preparation method. The formaldehyde adsorbent consists of a basis material, a high molecular organic amine polymer and a polylol polymer, wherein the high molecular organic amine polymer and the polylol polymer account for 1 to 50 percent of the formaldehyde adsorbent, and the balance being the basis material. The preparation method for the formaldehyde adsorbent comprises steps of preparing formaldehyde reagent, preprocessing the basis material, solidifying and forming, and the like. When the formaldehyde adsorbent adsorbs formaldehyde, formaldehyde gas can quickly enrich on the surface of the formaldehyde adsorbent, and carries out chemical reaction to generate substances harmless to human body, so as to achieve the effect of uninterruptedly and thoroughly removing the formaldehyde; the adopted raw materials are nontoxic and harmless; the preparation technology has simple and easily controlled process; and the prepared formaldehyde adsorbent is safe and environment-friendly, and has no secondary pollution.

Description

technical field [0001] The invention relates to a formaldehyde adsorbent and a preparation method thereof, which are suitable for removing harmful formaldehyde gas indoors. Background technique [0002] With the improvement of people's living standards, home decoration is becoming more and more luxurious. The use of a large number of decoration materials brings convenience to people, but also causes the continuous deterioration of indoor air quality, and the harm to human body has become a hot issue of concern. Formaldehyde is one of the main pollutants. It is listed as the primary indoor pollutant because of its wide pollution range, long duration and great harm. Formaldehyde is strongly irritating and sensitizing, seriously endangering human health, has a strong stimulating effect on human skin and mucous membranes, and can cause selective damage to vision and retina. Long-term exposure to formaldehyde can cause neurasthenia symptoms such as memory loss and lethargy, 2004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26A61L9/014B01D53/04
Inventor 范海明张琴陈兆文
Owner 718TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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