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Sustained-release chlorine dioxide gel, preparation method and application thereof

A chlorine dioxide gel, chlorine dioxide precursor technology, applied in the field of air purification, can solve the problems of unclear release rate, complex preparation process, short release period, etc., achieve uniform and stable release rate, high formaldehyde removal rate, Long release effect

Inactive Publication Date: 2010-08-25
BEIJING OKEANOS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] But above-mentioned chlorine dioxide slow-release gel product has common shortcoming: 1, preparation stable chlorine dioxide solution at first will prepare the chlorine dioxide gas of purity more than 90%, then absorb with lye, preparation process is complicated; 2. The release period of the product is short (about 2 months), and the release rate is not clear and unstable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Component raw materials:

[0040] Sodium chlorite 5.0g

[0041] Barium chlorite 5.0g

[0042] Agar 15.0g

[0043] Starch graft copolymer 5.0g

[0044] EDTA 4.0g

[0045] β-cyclodextrin 8.0g

[0046] Citric acid buffer 100g

[0047] Sodium Carboxymethyl Cellulose 8.0g

[0048]Sodium Gluconate 8.0g

[0049] Make up to 200g with deionized water.

[0050] Preparation method: Weigh each component according to the above weight ratio, then dissolve sodium gluconate and ethylenediaminetetraacetic acid in deionized water, then add β-cyclodextrin and sodium carboxymethylcellulose, and heat at 60°C Stir to dissolve, cool to room temperature, add sodium chlorite and barium chlorite, stir well, then add agar and starch graft copolymer, stir at a slow speed to disperse evenly, and finally add citric acid buffer ( Citric acid-sodium citrate buffer solution, pH=6.5), stirred until a gel-like semi-solid was formed to obtain 200 g of slow-release chlorine dioxide gel product.

Embodiment 2

[0052] Component raw materials:

[0053] Sodium chlorite 2.2g

[0054] Sodium polyacrylate 5.0g

[0055] Disodium edetate 0.5g

[0056] β-cyclodextrin 2.2g

[0057] Citric acid buffer 50g

[0058] Sodium Carboxymethyl Cellulose 2.2g

[0059] Sodium Gluconate 2.2g

[0060] Make up to 100g with deionized water.

[0061] Preparation method: Weigh each component according to the above weight ratio, then dissolve sodium gluconate and disodium edetate in deionized water, then add β-cyclodextrin and sodium carboxymethyl cellulose, Stir to dissolve at 50°C, add sodium chlorite after cooling to room temperature, stir well, then add sodium polyacrylate, stir slowly to disperse evenly, and finally add citric acid buffer (citric acid-sodium citrate buffer) under stirring liquid, pH=4.5), stirred until forming a gel-like semi-solid, to obtain 100g of slow-release chlorine dioxide gel product.

Embodiment 3

[0063] Component raw materials:

[0064] Potassium chlorite 8.0g

[0065] Cross-linked polyacrylic resin 16.0g

[0066] Tetrasodium EDTA 3.0g

[0067] Sodium Lauryl Sulfate 8.0g

[0068] β-cyclodextrin 8.0g

[0069] Borax buffer 120g

[0070] Polyacrylamide 3.0g

[0071] Polyvinylpyrrolidone 1.0g

[0072] Gluconic acid 8.0g

[0073] Make up to 200g with deionized water.

[0074] Preparation method: Weigh each component according to the above weight ratio, then dissolve gluconic acid and tetrasodium edetate in deionized water, then add sodium lauryl sulfate, β-cyclodextrin and polyacrylamide , polyvinylpyrrolidone, stir and dissolve at a temperature of 55°C, add potassium chlorite after cooling to room temperature, stir well, then add cross-linked polyacrylic acid resin, stir at a slow speed to make it disperse evenly, and finally add borax buffer solution (boric acid - borax buffer solution, pH=7.6), stirred until a gel-like semi-solid is formed to obtain 200 g of slo...

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Abstract

The invention provides sustained-release chlorine dioxide gel comprising the following components by weight percent: 0.1% to 5.0% of chlorine dioxide precursor, 1.0% to 10.0% of gel, 0.01% to 2.0% of chelating agent, 0.1% to 10.0% of inclusion agent, 30% to 70% of activating agent, 0.1% to 5.0% of sustained-release agent, 0.1% to 5.0% of stabilizing agent and deionized water in balancing amount. The sustained-release chlorine dioxide gel of the invention is capable of conducting the stable sustained-release process at a certain rate for 3 to 6 months, so the sustained-release chlorine dioxidegel has the advantages of long release period, uniform and stable release rate and lasting effect; the sustained-release chlorine dioxide gel is capable of not only removing formaldehyde from indoor air in an effective, safe and lasting way and ensuring the high removal rate of formaldehyde, but also disinfecting and sterilizing the indoor air continuously and thoroughly purifying the indoor air;moreover, the invention dispenses with high-purity chlorine dioxide gas and further has the advantages of simple preparation method and convenient operation.

Description

technical field [0001] The invention relates to the technical field of air purification, in particular to a slow-release chlorine dioxide gel, its preparation method and its application. Background technique [0002] With the improvement of people's living standards, people's requirements for the living environment are getting higher and higher, and indoor air pollution is increasingly concerned by people. [0003] Formaldehyde is one of the main pollutants of indoor air pollution. It is a colorless gas with a pungent odor and has strong reducing properties. It has the highest content in the adhesives used for wood-based panels. The release period of formaldehyde is as long as 3 to 15 years. When it encounters heat or tide, it will volatilize from the deep layer of the material and pollute the environment. Formaldehyde is a highly toxic substance and ranks second on the list of priority control of toxic chemicals in my country. It can be absorbed through the respiratory tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L9/04B01D53/72
Inventor 高源曹丽莲
Owner BEIJING OKEANOS TECH
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