Green and low-toxicity formaldehyde scavenger and preparation method thereof

A formaldehyde scavenger, formaldehyde removal technology, applied in separation methods, chemical instruments and methods, gas treatment and other directions, can solve problems such as poor adsorption effect and incomplete removal, and achieve the effect of improving moisture retention and fast and effective adsorption

Inactive Publication Date: 2020-02-18
王再华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the formaldehyde adsorption methods have th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Take 5 parts of ethanolamine, 5 parts of ethylene urea, 5 parts of adipic acid dihydrazide, 50 parts of cysteine ​​hydrochloride, 5 parts of surfactant lauroyl glutamic acid, and alkali-resistant penetrant OEP-70 by weight. 10 parts and 920 parts of deionized water, mix the above-mentioned ingredients, and dissolve them with ultrasonic wave for 30 minutes to make a formaldehyde scavenger.

[0036] Spray 100 mL of formaldehyde scavenger prepared in Example 1 on a wooden carrier of 1 square meter, dry it, and in 1 cubic meter of test cabin 1, put the sample into, inject formaldehyde, make the formaldehyde concentration in the test cabin after the concentration balance is 0.5-1.0 mg / m 3 , after a certain period of time, the concentration change was measured, and at the same time, the test cabin No. 2 was used as the blank control group, and the formaldehyde concentration in the blank cabin after equilibrium was 0.5-1.0 mg / m 3 , used to detect the natural attenuation rate ...

Embodiment 2

[0038] Take 40 parts of adipic dihydrazide, 40 parts of ethylene urea, 40 parts of resorcinol, 60 parts of chitosan, 50 parts of cysteine ​​hydrochloride, and surfactant sodium dodecylbenzenesulfonate by weight 20 parts, 30 parts of fast penetrating agent T, 720 parts of deionized water, mix the above ingredients, and dissolve them with ultrasonic wave for 20 minutes to make a formaldehyde scavenger.

[0039] Spray 100 mL of the formaldehyde scavenger prepared in Example 2 on a wooden carrier of 1 square meter, dry it, put the sample in 1 cubic meter of test cabin 1, inject formaldehyde, and make the formaldehyde concentration in the test cabin after equilibrium 0.5-1.0 mg / m 3 After acting for a certain period of time, the concentration change was measured (the determination method of formaldehyde concentration was determined by phenol reagent spectrophotometry according to GB / T18204. 26-2000), and the test chamber 2 was used as a blank test at the same time, and the formaldeh...

Embodiment 3

[0041] Take 20 parts of adipic dihydrazide, 15 parts of ethylene urea, 15 parts of thiourea, 10 parts of chitosan, 10 parts of cysteine ​​hydrochloride, and 10 parts of sodium dodecylbenzenesulfonate by weight. 10 parts, alkali-resistant penetrating agent OEP-70, 910 parts of deionized water, mix the above-mentioned ingredients, and dissolve them with ultrasonic assistance for 20 minutes to make a formaldehyde scavenger.

[0042] Spray 100 mL of rapid formaldehyde scavenger on a wooden carrier of 1 square meter, dry it, put the sample in the 1 cubic meter test chamber 1, and inject formaldehyde so that the formaldehyde concentration in the test chamber after equilibrium is 0.5-1.0 mg / m 3 After a certain period of time, the concentration change was measured. At the same time, the test chamber 2 was used as the blank chamber to test the natural decay rate. The purification efficiency was calculated according to the final concentration of the sample chamber and the comparison ch...

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PUM

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Abstract

The invention discloses a green and low-toxicity formaldehyde scavenger. The formaldehyde scavenger comprises the following components in parts by weight: 5-15 parts of ethylene urea, 5-15 parts of adipic dihydrazide, 10-80 parts of cysteine hydrochloride, 5-20 parts of a surfactant, 10-70 parts of a penetrating agent and 720-1000 parts of water. Compared with a traditional formaldehyde scavenger,the formaldehyde scavenger exerts synergistic effect among multiple components, and rapidly removes formaldehyde in indoor air; a reaction product of the scavenger and formaldehyde is a non-toxic andharmless substance; meanwhile, further diffusion of formaldehyde is prevented; the surfactant and the penetrant in the efficient formaldehyde scavenger can enable the formaldehyde catching agent to form films on the surface and inside a formaldehyde gas diffusion source; cysteine hydrochloride can improve the moisture retention of the film, promote the reaction between the formaldehyde scavengerin the film and formaldehyde in the diffusion source to generate a non-toxic harmless non-volatile product, and prevent formaldehyde from being released into air.

Description

technical field [0001] The invention belongs to the field of environmentally friendly new materials, and in particular relates to a green, low-toxic formaldehyde scavenger and a preparation method thereof. Background technique [0002] Excessive formaldehyde is a major cause of human building syndrome, and the research on removing trace formaldehyde in indoor air is very important. At present, researchers in many countries have applied for a large number of patents for various formaldehyde removal methods invented. The methods of removing formaldehyde can be roughly divided into: chemical method, biological absorption method, and physical adsorption method are described below. [0003] (1) Chemical reaction method: volatile aldehydes are difficult to physically adsorb, and chemical reactions such as condensation and degradation for formaldehyde removal in solution can be loaded with reactive reagents that can combine with aldehydes such as resorcinol and the surface of the...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/82B01D53/72B01D53/86B01D53/04
CPCB01D53/04B01D53/72B01D53/75B01D53/82B01D53/8668B01D2258/06
Inventor 王再华成建英
Owner 王再华
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