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Aqueous solution and method of prolonging life of residual chlorine in aqueous solution

A technology of aqueous solution and perchloric acid, applied in the field of aqueous solution, can solve the problems of shortened service life of hypochlorous acid

Active Publication Date: 2009-10-21
イーデオ +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the life of hypochlorous acid is gradually shortened

Method used

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  • Aqueous solution and method of prolonging life of residual chlorine in aqueous solution
  • Aqueous solution and method of prolonging life of residual chlorine in aqueous solution
  • Aqueous solution and method of prolonging life of residual chlorine in aqueous solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] Make KClO 3 Dissolved in pure water.

[0104] In the KClO 3 Add citric acid to the aqueous solution. Thus, the pH was adjusted to about 4.

[0105] Measure the KClO of this pH4 3 The residual chlorine concentration of the aqueous solution.

[0106] In addition, the KClO at pH 4 above 3 Add H to the aqueous solution 2 O 2 Aqueous solution, determine the residual chlorine concentration.

[0107] The results of this measurement (measured by the KI method) are shown in Table-1 below.

[0108] [Table 1]

[0109] Table 1

[0110] Elapsed time Concentration (ppm)

[0111] Potassium chlorate 125 125 125 125 125 125

[0112] Hydrogen perchloride 0 30 60 120 240 480

[0113] Residual chlorine 0 days 0 5 25 30 30 125

[0114] 7 days 0 200 250 300 300 350

[0115] 14 days 0 200 250 300 300 350

[0116] 30 days 0 200 250 300 300 350

[0117] It can be seen from the table-1 that by containing H 2 O 2 , Even after days, KClO 3 The residual chlorine conc...

Embodiment 2

[0120] Make KClO 3 Dissolved in pure water.

[0121] In the KClO 3 Add citric acid to the aqueous solution. Thus, the pH was adjusted to about 4.

[0122] In the KClO 3 NaClO is further added to the aqueous solution.

[0123] Then, the residual chlorine concentration is measured. The result is not significantly different from the case of the NaClO aqueous solution.

[0124] Then, use figure 1 The anode electrolyzed water produced in the illustrated two-compartment electrolytic cell replaces the above-mentioned pure water. The two-chamber electrolytic cell is as follows: use 80 mesh platinum electrode (the size of the electrode is 80mm×60mm) as the positive electrode, use the titanium electrode (the size of the electrode is 80mm×60mm) as the negative electrode, and use the fluorine-based cation exchange membrane as the The diaphragm that separates the anode and cathode compartments. Then, pure water is supplied to the cathode chamber and the anode chamber.

[0125] 80 ppm NaClO wa...

Embodiment 3

[0129] Dissolve 40ppm NaClO and 100ppm KClO in the anode electrolyzed water of Example 2 2 . Further, citric acid was added to adjust the pH to about 6.

[0130] Determine the content of NaClO and KCIO 2 The residual chlorine concentration of the aqueous solution (measured by the KI method), the results are shown in Figure 8 .

[0131] By this Figure 8 It can be seen that the long-term high content of NaClO and KClO 2 The residual chlorine concentration of the aqueous solution.

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Abstract

An aqueous solution which retains a high residual chlorine concentration over long and has excellent disinfectant (bactericidal) ability. The aqueous solution contains at least one member selected from the group consisting of halogen acids and salts thereof and further contains active oxygen, wherein the halogen acids are at least one member selected from the group consisting of hypochlorous acid, chlorous acid, chloric acid, and perchloric acid, the total amount of the at least one member selected from the group consisting of the halogen acids and salts thereof and contained in the aqueous solution is 10-50,000ppm, and the total amount of the active oxygen contained in the aqueous solution is 0.1-1,000ppm.

Description

Technical field [0001] The present invention relates to aqueous solutions. In particular, it relates to a technique for extending the life of residual chlorine, which is an indicator of the ability (sterilization power, disinfection power, or oxidizing power) of a disinfectant or detergent. Background technique [0002] Hypohalite (especially hypochlorite (ClO - )) The aqueous solution is used for disinfection (sterilization) and the like. The oxidizing power (sterilizing power: bactericidal power) of this hypochlorite was evaluated by the concentration of residual hypochlorous acid. The concentration of hypochlorous acid was evaluated by the concentration of residual chlorine. In addition, the residual chlorine concentration is measured by the iodine method or the DPD (diethyl p-phenylenediamine) method. [0003] Residual chlorine obtained from hypochlorous acid has a short life. The life of this residual chlorine depends on the pH. In addition, when acidity is formed, chlorine ...

Claims

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Application Information

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IPC IPC(8): A01N59/08A01N59/00A01P3/00A61L2/18B08B3/08C01B11/06C01B11/10C01B11/14C01B11/16C02F1/46C11D7/18
CPCC01B11/12C02F2001/46161A61L2/18C01B11/08C02F2201/46115A01N59/00C02F1/4674C01B11/16C01B11/04
Inventor 伊藤秀孝
Owner イーデオ
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