Compound formaldehyde adsorbent

A formaldehyde adsorption and composite technology, applied in the field of air purification, can solve the problems of slow chemical decomposition reaction, leakage of formaldehyde, low adsorption rate, etc., and achieve the effects of reducing ash content, strengthening adsorption capacity, and increasing decomposition capacity.

Inactive Publication Date: 2013-08-14
WUXI KAILI PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical adsorbents mainly include activated carbon, nitric acid modified activated carbon, hydrogen peroxide modified activated carbon, activated alumina, zeolite molecular sieve, etc., which are characterized by fast adsorption rate, but after the adsorption is saturated, it cannot continue to adsorb, but will leak formaldehyde to the outs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix 180g of activated carbon powder and 10g of titanium dioxide powder evenly, add 25g of potassium hydroxide aqueous solution with a mass fraction of 5%, and dry after stirring; add 2g of microcrystalline cellulose to the dried mixture, and then add 9g Sodium peroxide powder, mix well. The average particle size of the activated carbon powder, titanium dioxide powder, microcrystalline cellulose and sodium peroxide powder is 5-10 μm.

Embodiment 2

[0018] Mix 200g of activated carbon powder and 30g of titanium dioxide powder evenly, add 40g of potassium hydroxide aqueous solution with a mass fraction of 10%, dry after stirring; add 8g of microcrystalline cellulose to the dried mixture, and then add 20g Sodium peroxide powder, mix well. The average particle size of the activated carbon powder, titanium dioxide powder, microcrystalline cellulose and sodium peroxide powder is 5-10 μm.

Embodiment 3

[0020] Mix 190g of activated carbon powder and 20g of titanium dioxide powder evenly, add 30g of potassium hydroxide aqueous solution with a mass fraction of 7%, and dry after stirring; add 5g of microcrystalline cellulose to the dried mixture, and then add 15g Sodium peroxide powder, mix well. The average particle size of the activated carbon powder, titanium dioxide powder, microcrystalline cellulose and sodium peroxide powder is 5-10 μm.

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Abstract

The invention provides a compound formaldehyde adsorbent which is prepared by the following specific steps: mixing 180-200 parts by weight of activated carbon powder with 10-30 parts by weight of titanium dioxide powder uniformly, adding 25-40 parts by weight of potassium hydroxide water solution with mass fraction of 5-10% to the mixture and drying the mixture after uniformly stirring; and adding 2-8 parts by weight of microcrystalline cellulose to the dried mixture, then adding 9-20 parts by weight of sodium peroxide powder and mixing the materials uniformly, thus obtaining the compound formaldehyde adsorbent. The adsorbent utilizes various mechanisms which adsorb and decompose formaldehyde, is thorough in adsorption, has good decomposition effects and has the advantages of simple preparation method and low cost.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular to an adsorbent for absorbing and decomposing formaldehyde. Background technique [0002] Formaldehyde is a colorless, irritating gas with a strong odor, and its 35% to 40% aqueous solution is commonly known as formalin. Formaldehyde is a protoplasmic poison, which can be combined with protein. After inhalation of high concentration formaldehyde, severe irritation and edema of the respiratory tract, eye stinging, headache, and bronchial asthma may occur. Direct skin contact with formaldehyde can cause dermatitis, stains, and necrosis. Frequent inhalation of a small amount of formaldehyde can cause chronic poisoning, mucous membrane hyperemia, skin irritation, allergic dermatitis keratosis and fragility, nail bed finger pain, long-term inhalation by pregnant women may lead to newborn baby deformities, and even death, long-term inhalation by men can cause male Sperm deformi...

Claims

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Application Information

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IPC IPC(8): B01D53/02B01D53/81B01D53/72B01J20/24
Inventor 杨毅跃康国伟姚程成蒙相锋鲁尧
Owner WUXI KAILI PHARMA
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