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Slow-release chlorine dioxide solid disinfectant

A chlorine dioxide and disinfectant technology, which is applied in the direction of disinfectant, biocide, bactericide, etc., can solve the problems of storage, transportation and use inconvenience, the need to make and use it now, and the change of slow-release performance, etc., to achieve chlorine dioxide The effect of high substance content, convenient packaging and transportation, and long release period

Inactive Publication Date: 2012-09-19
吕永生 +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chlorine dioxide gas is flammable and explosive, which brings great inconvenience to storage, transportation and use. It needs to be produced and used in actual use.
The stability of this method is obviously improved, but the sustained release performance is changed little

Method used

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  • Slow-release chlorine dioxide solid disinfectant
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  • Slow-release chlorine dioxide solid disinfectant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 The preparation of slow-release chlorine dioxide solid disinfectant

[0022] 1. Prepare PVA solution a:

[0023] Weigh 24g of polyvinyl alcohol (PVA) into 150mL of pure water, then add 250mL of ethanol, stir evenly, and make PVA solution a.

[0024] 2. Prepare PMMA solution b:

[0025] Weigh 12 g of polymethyl methacrylate (PMMA) and add it to 1000 ml of ethyl acetate, stir while adding, and make PMMA solution b.

[0026] 3. Prepare sodium chlorite microcapsules (named as microcapsules A):

[0027] (1), weigh 10g of solid sodium chlorite (NaClO 2 ), after grinding, spray with 50mL of PVA solution a, while stirring continuously until the spraying is completed, and then put it into a vacuum drying oven at 50°C for 12 hours to obtain NaClO coated with PVA 2 Particle A', i.e. NaClO 2 / PVA.

[0028] (2), the NaClO 2 / PVA particles A' are sprayed with 100mL of PMMA solution b, while stirring continuously, after the spraying is completed, put in a vacuum dr...

Embodiment 2

[0035] Embodiment 2 The slow-release chlorine dioxide solid preparation disinfectant is used for the disinfection of drinking water

[0036] According to the treatment of 100 tons of drinking water per day, add 4 kg of chlorine dioxide disinfectant prepared by the method of embodiment 1, within 6-8 days, the concentration of chlorine dioxide in the water can be maintained at 0.04-0.10 mg / L, which meets the "Drinking Water Sanitation" Standard" (GB5749-2006), the requirement for residual chlorine dioxide in the tip water to be greater than 0.02mg / L.

Embodiment 3

[0038] In addition, other different combinations were also tested according to the above process, and 100 tons of drinking water was still treated per day. Adding 4 kg of chlorine dioxide disinfectant prepared by the above method can maintain the concentration of chlorine dioxide in water at 0.03 to 0.08 mg / L for 4 to 7 days (See Table 1 for details), which meets the requirement that the residual chlorine dioxide in the tip water should be greater than 0.02mg / L in the Hygienic Standard for Drinking Water (GB5749-2006).

[0039] Table 1 The effect of chlorine dioxide solid disinfectant prepared in different proportions for on-site disinfection

[0040]

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PUM

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Abstract

The invention relates to a slow-release chlorine dioxide solid disinfectant, which is formed by mixing sodium chlorite microcapsules and solid acid microcapsules according to a weigh ratio being 1:(1-2), core materials of the sodium chlorite microcapsules are sodium chlorite, a water-soluble organic matter layer and a water-insoluble high polymer material layer are sequentially covered outside the core materials, core materials of the solid acid microcapsules are solid acid or salts capable of releasing hydrogen ions, a water-soluble organic matter layer and a water-insoluble high polymer material layer are sequentially covered outside the core materials, the water-soluble organic matter is selected from polyvinyl alcohol, polyethylene glycol or polyacrylamide, and the water-insoluble high polymer materials are selected from polymethyl methacrylate, ethylene-vinyl acetate or polylactic acid. The disinfectant cannot be easily deliquesced, and the stability is high. After the slow-release chlorine dioxide solid disinfectant is placed into water, sodium chlorite and solid acid are respectively and slowly released onto the surfaces of the microcapsules, chlorine dioxide is generated through the reaction, the contact between the sodium chlorite and the solid acid is retarded, and good slow release performance is realized.

Description

technical field [0001] The invention belongs to preparations in the field of sterilization and disinfection, in particular to a slow-release chlorine dioxide solid disinfectant. Background technique [0002] Chlorine dioxide is a high-efficiency, broad-spectrum fungicide, widely used in various water treatment, sterilization and disinfection, food preservation, anti-corrosion, etc. Three generations of disinfectants. Chlorine dioxide gas is flammable and explosive, which brings great inconvenience to storage, transportation and use. It needs to be produced and used in actual use. Therefore, more stable chlorine dioxide solutions or binary or one-pack chlorine dioxide solid disinfectants made of sodium chlorite as the main raw material are mostly used at present. Chlorine dioxide solid preparations can be divided into adsorption type and reactive type according to different preparation methods, preparation principles and functions. The reactive type is the current mainstr...

Claims

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Application Information

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IPC IPC(8): A01N59/00A01N25/34A01P1/00A01P3/00
Inventor 吕永生钱吉生韩建平徐瑞平丁震郑浩
Owner 吕永生
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