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Preparation method of low-concentration formaldehyde purification material

A formaldehyde purification and low-concentration technology, applied in the field of air purification, can solve the problems of easy odor and short service life of formaldehyde purification materials, and achieve the effect of increasing the service life and rapid enrichment

Active Publication Date: 2019-08-13
NANJING YRD ECO DEV RI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of short service life of formaldehyde purification materials in the prior art or easy occurrence of peculiar smell during use, and provide a formaldehyde purification method that combines physical adsorption, chemical adsorption and catalytic decomposition principles to remove low-concentration formaldehyde in indoor air at room temperature materials and their application

Method used

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Examples

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preparation example Construction

[0028] A method for preparing a low-concentration formaldehyde purification material, which is prepared by a step-by-step impregnation method, comprising the following steps:

[0029] Step 1: Take a certain amount of porous material with high specific surface area as the carrier, soak the carrier in permanganate solution at a temperature of 10-80°C for 0.1-1h, then filter and dry at 60-100°C for 5-10h Composite material A is obtained; wherein, in terms of mass ratio, the ratio of porous material to permanganate is 100:(0.5-5); the shape of the porous material with high specific surface area is granular, columnar, honeycomb, spherical One of them, preferably with a specific surface area greater than 1200 m 2 One kind of activated carbon such as coconut shell, fruit shell, coal, etc. per g, or the specific surface area is greater than 600 m 2 / g of molecular sieves such as X-type and Y-type; the permanganate is potassium permanganate or sodium permanganate, preferably potassium...

Embodiment 1

[0034] Step 1: Weigh 1000 g of granular coconut shell activated carbon as a carrier, impregnate it in a potassium permanganate solution containing 10 g of potassium permanganate by equal impregnation method, impregnate at 60°C for 30 min, then filter and dry Place in a vacuum drying oven and dry at 80°C for 6 hours to obtain composite material A;

[0035] Step 2: Prepare a sodium hydroxide solution with a concentration of 1 mol / liter, immerse the composite material A in the sodium hydroxide solution at 40°C for 20 minutes, then filter and dry in a vacuum drying oven at 80°C for 6 hours to obtain composite material B;

[0036] Step 3: Immerse composite material B in a mixed solution of 6 g tryptophan and 6 g polyacrylonitrile by equal impregnation method, soak at 60°C for 30min, then filter and place in a vacuum drying oven at 80°C Dry for 6h to obtain composite material C;

[0037] Step 4: Immerse the composite material C in a polyhexamethylene biguanide hydrochloride soluti...

Embodiment 2

[0045] Step 1: Weigh 1000 g of coal-based honeycomb activated carbon as a carrier, impregnate it in a potassium permanganate solution containing 20 g of potassium permanganate by equal impregnation method, impregnate at 40°C for 50 minutes, then filter and place Dry in a vacuum oven at 90°C for 5 hours to obtain composite material A;

[0046] Step 2: Prepare a potassium hydroxide solution with a concentration of 2 mol / liter, immerse the composite material A in the potassium hydroxide solution at 30°C for 10 minutes, then filter and dry in a vacuum oven at 90°C for 5 hours to obtain composite material B;

[0047] Step 3: Immerse the composite material B in a mixed solution of 7 g lysine and 7 g polyaniline by equal impregnation method, soak at 40°C for 50 min, then filter and dry in a vacuum oven at 90°C for 5 h , to obtain composite material C;

[0048] Step 4: Immerse the composite material C in a dodecyldimethylbenzyl ammonium chloride solution with a pH value of 9, and im...

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Abstract

The invention provides a preparation method of a low-concentration formaldehyde purification material. A step-by-step impregnation approach is adopted, a certain quantity of a porous material with a large specific surface area is sequentially soaked in a permanganate solution, a strong alkali solution, a chemical adsorption modifier solution and an antibacterial agent solution, and the low-concentration formaldehyde purification material is obtained after filtration and drying. According to the method, on the basis of physical adsorption of a traditional porous material, the effective oxygen vacancy of the material is increased by regenerating MnO2 in situ and adding alkali metal components on the surface of the material, and correspondingly the catalytic decomposition performance of the purification material in a specific environment is achieved. By carrying out chemical adsorption modification on the previously prepared purification material, the chemical adsorption capacity of the material on formaldehyde is improved. By carrying out antibacterial treatment on the material after chemical adsorption, the environmental tolerance of the purification material is realized, and the problem is solved that most current materials can be infected with bacteria and thus release peculiar smell after being used for a long time.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular to a preparation method of a low-concentration formaldehyde purification material. Background technique [0002] As a typical representative of indoor gaseous pollutants, formaldehyde has a release cycle of up to 15 years and is highly irritating. If inhaled in large quantities, it will damage the respiratory system, central nervous system, immune system, digestive system, blood system, kidney and liver, etc. It can even cause chromosomal mutations, causing various cancers such as nasal cavity, oral cavity, nasopharynx, throat, skin and digestive tract. [0003] Domestic purification technology for formaldehyde is carried out from the following two perspectives, one is the control of formaldehyde release pollution sources, and the other is the terminal purification of released formaldehyde. The control of indoor formaldehyde pollution sources requires people to use green a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/86B01D53/72
CPCB01D53/02B01D53/81B01D53/8668B01D2253/102B01D2253/116
Inventor 邹巍巍毕军丁长春梁红超
Owner NANJING YRD ECO DEV RI CO LTD
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