Long-term slow-release chlorine dioxide solid material

Abstract

The invention discloses a long-term slow-release chlorine dioxide solid material, which consists of a chlorine dioxide precursor, a carrier, an activating agent, a stabilizing agent, a fixing agent and essence, wherein a unitary solid granular preparation is prepared from the raw materials, the chlorine dioxide precursor is immobilized in the pore channel of the inert carrier and reacts with the activating agent to generate chlorine dioxide gas, and the release rate of chlorine dioxide is subjected to double adjustment of the reaction in the pore channel of the carrier and the pore channel diffusion resistance. The solid material is stable in storage and free of chlorine dioxide leakage, chlorine dioxide-containing gas can be slowly released for a long time by opening a package and contacting with air when the solid material is used, volatile organic matters such as formaldehyde, methylbenzene and the like in an indoor environment can be effectively removed, peculiar smell is removed,and the solid material further has sterilization and disinfection effects.

Description

technical field [0001] The invention relates to the technical field of indoor environmental pollutant treatment, in particular to a material capable of stable storage and long-term controllable slow release of chlorine dioxide gas during use and a preparation method thereof. Background technique [0002] Volatile organic compounds such as formaldehyde and toluene released by decoration materials have become the main pollutants in the indoor environment. People who stay in the environment where these pollutants exceed the standard for a long time will seriously endanger their health. At present, the World Health Organization has listed formaldehyde as a potential hazard. Carcinogens and important environmental pollutants. Chlorine dioxide is a strong oxidizing agent, which can oxidize formaldehyde, toluene and other organic substances into non-toxic and harmless carbon dioxide and water at normal temperature, so as to effectively remove these pollutants. The strong oxidizing...

AI Technical Summary

Problems solved by technology

[0003] Chlorine dioxide is active and poor in stability, and cannot be compressed for storage and transportation. It is generally produced on-site when used, which limits its use to a large extent.

In order to expand its scope of application, some solid chlorine dioxide products have also appeared on the market, such as the patent CN1175350A report that the chlorine dioxide solution is adsorbed on the carrier to make tablets or powders, and acidification is added to release chlorine dioxide during use; patent CN104707463A It is reported that the reaction of sodium chlorite with citric acid, oxalic acid, etc. is used to prepare chlorine dioxide sustained-release gel. The above-mentioned patents have made beneficial improvements in the storage and safe use of chlorine dioxide, but the existing chlorine dioxide products There are still some problems, such as chlorine dioxide leakage during product storage, which affects the safety and shelf life of the product. The release rate of chlorine dioxide during use is unstable. Due to the high concentration of raw materials in the early stage, the rate of chlorine dioxide production is fast, and it gradually decays later. , these will cause the concentration of chlorine dioxide in the treatment environment to be difficult to control, the product's validity period is short, and the use effect needs to be further improved