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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AI-Extracted Technical Summary

Problems solved by technology

But the 72h formaldehyde removal rate is 91.4%, the ...

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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.

Application Domain

Dispersed particle separation

Technology Topic

Manganese oxideChemistry +9

Image

Examples

Experimental program(7)
Comparison scheme(1)

Example Embodiment

[0023] Example 1

[0024] A remover for rapidly removing indoor formaldehyde, the formaldehyde removal reagent is prepared according to the following weight ratios: 15 parts of sodium hypochlorite, 2 parts of cobalt 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. The removal reagent is sprayed after being sealed at 30°C for 1 hour, the indoor formaldehyde concentration before spraying is measured and the formaldehyde concentration is measured by sampling at intervals of 20 minutes after spraying to obtain the change of formaldehyde concentration with time after spraying, such as figure 1 As shown, it can be seen that the removal rate of formaldehyde reaches more than 95% after 1h.

Example Embodiment

[0025] Example 2

[0026] A remover for quickly removing indoor formaldehyde, the formaldehyde removal reagent is prepared according to the following weight ratios: 20 parts of sodium hypochlorite, 2 parts of cobalt 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 of the removal reagent was 10. After 1 hour of sealing at different temperatures, spray the removal reagent, measure the indoor formaldehyde concentration before spraying and measure the formaldehyde concentration by sampling 1 hour after spraying to obtain the change of formaldehyde concentration with indoor temperature after spraying, such as figure 2 As shown, it can be seen that the removal effect of formaldehyde is good at 25-35 °C.

Example Embodiment

[0027] Example 3

[0028] A remover for rapidly removing indoor formaldehyde, the formaldehyde removal reagent is prepared according to the following weight ratios: 12 parts of sodium hypochlorite, 2 parts of cobalt 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 at 7-12. The removal reagent is sprayed after being sealed at 35°C for 1 hour, the indoor formaldehyde concentration is measured before spraying, and the formaldehyde concentration is measured after spraying for 1 hour to obtain the change of formaldehyde concentration with pH after spraying, such as image 3 As shown, it can be seen that the pH of 10-11 has a good removal effect on formaldehyde.

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Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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