Catalyst for oxidizing and eliminating formaldehyde at room temperature and preparation method thereof

Abstract

The invention provides a catalyst for oxidizing and eliminating formaldehyde at room temperature and a preparation method thereof. The catalyst comprises a carrier, a noble metal active ingredient and an adjuvant, wherein the carrier is a compound or a mixture consisting of two or more than two oxides, the noble metal active ingredient at least comprises one of noble metal elements, including ruthenium, rhodium, palladium, platinum, gold or silver; the adjuvant at least comprises one of alkali metal elements, including lithium, sodium, potassium or cesium; the noble metal active ingredient is 0.01-0.099% of the total quality of the catalyst based on the noble metal element, and the adjuvant is 0.01-0.25% of the total quality of the catalyst based on the alkali metal element. Under the condition that the percentage of the used noble metal active ingredient is very low based on the total quality of the catalyst, the catalyst has a high elimination factor on formaldehyde, therefore the cost of the catalyst can be reduced, and catalyst is likely to be popularized and used.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for eliminating formaldehyde by oxidation at room temperature and a preparation method thereof. Background technique [0002] In recent years, the problem of air pollution has become increasingly serious, causing great harm to the environment and human health. Among them, formaldehyde is one of the most serious pollutants in indoor air. Its hazards are mainly reflected as follows: (1) Formaldehyde is a protoplasmic poison, which can be combined with protein. After inhaling high-concentration formaldehyde, severe irritation of the respiratory tract, edema, eye sting, headache and other symptoms will occur, and bronchial asthma may also occur. (2) Direct skin contact with formaldehyde can cause dermatitis, stains, and necrosis. (3) Frequent inhalation of a small amount of formaldehyde can cause chronic poisoning, mucous membrane hyperemia, skin irritation, allergic dermatitis keratosis an...

AI Technical Summary

Problems solved by technology

Although this technology has certain application value, it needs to use ultraviolet excitation light source, and the persistence of the catalyst is poor, so it is difficult to apply it on a large scale.

At present, there are also some reports about the elimination of formaldehyde by room temperature oxidation, such as patent numbers ZL200410047973.7, ZL200710121423.9, ZL200410102873.3, etc., but the content of noble metals in the catalysts reported above is generally high, which increases the cost of the catalyst and is not conducive to the commercialization of the catalyst. large-scale promotion

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