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Preparation of hypochlorous and disinfectant liquid

A technology for disinfecting water and hypochlorous acid, applied in the electrolysis process, electrolysis components, etc., can solve the problems of low hypochlorous acid content, strong acidity of the disinfectant, and high residual salt content

Inactive Publication Date: 2009-01-14
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of low hypochlorous acid content, strong acidity of the disinfectant and excessive residual salt in the existing electrolytic production of hypochlorous acid disinfectant, and provide two kinds of hypochlorous acid disinfection produced by electrolysis Liquid method, the two methods have enhanced the practicability of electrolysis to produce hypochlorous acid disinfectant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In the first step, 0.5% NaCl is electrolyzed without a diaphragm, and the available chlorine of the resulting solution is 1210ppm, and the acidity is pH8.6.

[0027] The second step is to carry out ion diaphragm electrolysis on the above electrolytic generated liquid, and its acidity decreases continuously with the electrolysis. When the pH reaches 4.64, the available chlorine in the electrolytic generated liquid is 1702 ppm.

Embodiment 2

[0029] In the first step, 1.0% NaCl is electrolyzed without a diaphragm, and the available chlorine of the resulting liquid is 2162ppm, and the acidity is pH8.9.

[0030] In the second step, the above electrolyzed solution is electrolyzed with an ion diaphragm, and its acidity decreases continuously with the electrolysis. When the pH reaches 4.82, the available chlorine in the electrolyzed solution is 3193ppm.

[0031] Technical scheme two, a preparation method of hypochlorous acid disinfection water, comprising the following steps: a. electrolyzing NaCl solution in a non-diaphragm mode, so that NaCl can be converted into NaClO to the greatest extent; b. electrolyzing NaCl solution in an ion-diaphragm mode, Generate HClO and HCl on the anode side; c. Mix the electrolytic solution on the anode side of step a and step b in proportion, so that the HCl generated in step b neutralizes the NaClO generated in step a to form HClO.

Embodiment 3

[0033] In the first step, 0.5% NaCl is electrolyzed without a diaphragm, and the available chlorine of the resulting liquid is 1205ppm, and the acidity is pH8.6.

[0034] In the second step, 0.1% NaCl is electrolyzed with an ion membrane. When the pH reaches 2.24, the available chlorine in the electrolytic solution is 62 ppm.

[0035] The 3rd step, by the first step electrolysis generation liquid: the ratio of second step generation liquid=1: 9.2 is mixed, and obtaining acidity is pH5.01, and available chlorine is the disinfectant of 167ppm.

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PUM

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Abstract

Two processes of preparing HClO disinfectant. NO.1 a. Electrolysis NaCl solution with no diaphragm, made molNaCl:mol NaClO>1:1; b. Electrolysis further electrolytic solution from a besides positive pole at diaphragm cell. HCl produced neutralizes NaClO to form HCl. NO.2 Electrolysis NaCl solution with no diaphragm to be NaClO, HClO and HCl. Mix the produced solution from a and b to form HClO.

Description

technical field [0001] The present invention relates to the method for producing chlorine-containing disinfectant by electrolysis, more specifically relates to the method for producing hypochlorous acid disinfectant by electrolysis. Background technique [0002] Chlorine-containing disinfectant is one of the most commonly used effective sterilization products in agriculture, food industry and environmental protection, and its active ingredient is hypochlorous acid or hypochlorite. According to the U.S. Environmental Protection Agency (EPA), the bactericidal ability of hypochlorous acid under the same conditions is tens to hundreds of times that of hypochlorites. In order to maximize the bactericidal efficiency of hypochlorite, people use this type of product in an acidic environment as much as possible, and even adjust the hypochlorite to acidity with hydrochloric acid and other acid products before use, which not only increases the cost , and it is very inconvenient in pra...

Claims

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Application Information

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IPC IPC(8): C25B1/26
Inventor 郑国生周家春
Owner EAST CHINA UNIV OF SCI & TECH
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