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Reagent and method for removing formaldehyde

A reagent and formaldehyde technology, applied in the field of formaldehyde removal reagents, can solve the problems of low removal rate and long removal time, and achieve the effect of high removal rate, short removal time and long duration

Inactive Publication Date: 2018-12-21
SHEYANG RES INST OF NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the 72h formaldehyde removal rate is 91.4%, the removal time is longer and the removal rate is lower

Method used

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  • Reagent and method for removing formaldehyde
  • Reagent and method for removing formaldehyde
  • Reagent and method for removing formaldehyde

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A remover for quickly removing indoor formaldehyde, the formaldehyde removal agent is configured according to the following weight ratio: 15 parts of sodium hypochlorite, 2 parts of dicobalt trioxide, 8 parts of polyacrylamide, 3 parts of potassium dihydrogen phosphate, 3 parts of ethanol, 5 parts of nano manganese dioxide, 64 parts of water. The pH value of the removal reagent is 10. After being sealed at 30°C for 1 hour, the removal reagent is sprayed, the formaldehyde concentration in the room before spraying is measured, and the concentration of formaldehyde is sampled at intervals of 20 minutes after spraying to obtain the formaldehyde concentration after spraying. Changes with time, such as figure 1 As shown, it can be seen that the removal rate of formaldehyde reaches more than 95% after 1 hour.

Embodiment 2

[0026] A remover for quickly removing indoor formaldehyde, the formaldehyde removal agent is configured according to the following weight ratio: 20 parts of sodium hypochlorite, 2 parts of dicobalt trioxide, 6 parts of polyacrylamide, 3 parts of potassium dihydrogen phosphate, 4 parts of ethanol, 8 parts of nano manganese dioxide, 57 parts of water. The pH value of the removal reagent is 10. Spray this removal reagent after sealing at different temperatures for 1 hour, measure the concentration of formaldehyde in the room before spraying and take samples to measure the concentration of formaldehyde 1 hour after spraying to obtain the change of formaldehyde concentration with the indoor temperature after spraying, as shown in figure 2 As shown, it can be seen that 25-35 ° C has a good removal effect on formaldehyde.

Embodiment 3

[0028] A remover for quickly removing indoor formaldehyde, the formaldehyde removal agent is configured according to the following weight ratio: 12 parts of sodium hypochlorite, 2 parts of dicobalt trioxide, 12 parts of polyacrylamide, 3 parts of potassium dihydrogen phosphate, 5 parts of ethanol, 6 parts of nano manganese dioxide, 60 parts of water. The pH of the removal reagent is set to 7-12. After being sealed at 35°C for 1 hour, the removal reagent is sprayed, the concentration of formaldehyde in the room before spraying is measured, and the concentration of formaldehyde is sampled and measured after spraying for 1 hour to obtain the change of formaldehyde concentration with pH after spraying, as shown in image 3 As shown, it can be seen that the removal effect of formaldehyde is good when the pH is 10-11.

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Abstract

The invention discloses a reagent and method for removing formaldehyde. The reagent is mainly prepared from the following raw materials in parts by weight: 10-30 parts of sodium hypochlorite, 1-2 parts of cobalt sesquioxide, 6-15 parts of polyacrylamide, 2-6 parts of monopotassium phosphate, 2-6 parts of ethanol, 2-10 parts of nano-manganese oxide and 31-77 parts of water. The method comprises thefollowing steps: (1) carrying out indoor sealing, and controlling the indoor temperature to be 25-35 DEG C; and (2) spraying a formaldehyde remover indoor. The reagent provided by the invention can remove formaldehyde in indoor air efficiently and quickly, has high safety, and is convenient and feasible.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a reagent and method for removing formaldehyde. Background technique [0002] With the progress of society, the rapid development of science and technology and economy, people's living standards are improving day by day, people are paying more and more attention to their living environment, and various interior decorations are becoming more and more popular, which has caused an upsurge of interior decoration. There are many types of interior decoration materials, and the use of various additives is becoming more and more extensive. For example, the artificial board bonded by urea-formaldehyde resin and phenolic resin contains a large amount of free formaldehyde. Formaldehyde is a common indoor decoration air pollutant. It is a colorless, irritating gas with a strong odor. It is slightly heavier than air and easily soluble in water. Its 35wt%-40wt% aqueous s...

Claims

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Application Information

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IPC IPC(8): B01D53/72B01D53/78B01D53/86
CPCB01D53/72B01D53/78B01D53/8668B01D2251/108B01D2255/2073
Inventor 江伟周东山王晓亮薛奇
Owner SHEYANG RES INST OF NANJING UNIV
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