Compound formaldehyde adsorbent

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...

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 outside; Adsorption is to add chemical substances to the physical adsorbent to decompose formaldehyde into harmless substances. It is characterized in that the adsorption and decomposition of formaldehyde is thorough, and the effect of purifying formaldehyde is good, but the chemical decomposition reaction is slow and the adsorption rate is low.