JPH08168774A - Oxidizing water and its production - Google Patents

Abstract

PURPOSE: To simply, inexpensively and efficiently produce an oxidizing water excellent in sterilizing effect by mixing respectively water and hypochlorite, inorg. acid and/or org. acid at a specified ratio (wt.%) based on water. CONSTITUTION: The oxidizing water is constituted by mixing respectively the water and the hypochlorite, inorg. acid and/or org. acid at a ratio of 0.005-0.5wt.% hypochlorite and 0.000001-0.20wt.% inorg. acid and/or org. acid. Sodium hypochlorite is used as the hypochlorite. Moreover, hydrochloric acid is used as the inorg. acid. The oxidizing water is used as a disinfectant at a supermarket. a hospital, a farm, a golf course, etc.. In this way, the oxidizing water excellent in sterilizing effect is simply, inexpensively and efficiently produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to oxidized water and a method for producing the same, and more particularly to oxidized water prepared by mixing water, hypochlorite, an inorganic acid and / or an organic acid and a method for producing the same. Oxidized water, which is generally called super-oxidized water, highly-oxidized water, acidic water, strongly acidic electrolyzed water, etc., is a liquid that has a bactericidal effect, and is used in supermarkets, hotels, restaurants, food manufacturers, hospitals, farms, dairy farming and livestock farming. Used as a sterilizing solution in fields, golf courses, etc.

[0002]

2. Description of the Related Art Conventionally, as a method for producing oxidizing water, an electrolysis method of water or saline is known. However,
When electrolyzing, an electrolytic cell is required, and the manufacturing device becomes an expensive device. Further, the alkaline water generated in the cathode cell during electrolysis has no use and has a drawback that the yield with respect to the supplied water is poor.

[0003]

SUMMARY OF THE INVENTION In view of the above situation, an object of the present invention is to provide an oxidizing water which is easy to handle and has a good bactericidal effect at a low yield.

[0004]

Means for Solving the Problems As a result of intensive investigations for solving the above problems, the present inventors have found that handling by mixing water with hypochlorite, an inorganic acid and / or an organic acid. The inventors have found that oxidized water having a sterilizing effect with good yield can be easily produced at low cost, and completed the present invention. That is, in the present invention, water and hypochlorite, an inorganic acid and / or an organic acid are added to water and hypochlorite is 0.00
5 to 0.5% by weight and inorganic acid and / or organic acid 0.0
The present invention relates to oxidized water mixed in a proportion of 00001 to 0.20% by weight and a method for producing the same.

The present invention will be described in detail below. Since hypochlorite has a bactericidal effect, it is generally used for sterilization. However, since the aqueous solution of hypochlorite is alkaline with a pH of about 12 to 13, and hypochlorous acid exists in the form of ClO ^{− in} the aqueous solution,
Its bactericidal power is weak. However, by mixing an inorganic acid and / or an organic acid in an aqueous solution of hypochlorite,
To less than 6 to remove residual chlorine in the form of HClO or Cl
It can be present in the form of ₂ , and it is possible to produce oxidized water having a strong bactericidal action.

In the present invention, the oxidized water has a pH of 1.
It is necessary to adjust to 5 to 6.0, redox potential to 800 to 1200 mV, and residual chlorine concentration to 50 to 500 ppm.

The mixing ratio of hypochlorite in the present invention is in the range of 0.005 to 0.5% by weight, preferably 0.02 to 0.06% by weight, based on water. The hypochlorite mixed with water may be used in a solid state or an aqueous solution.

The mixing ratio of the inorganic acid and / or the organic acid is 0.000001 to 0.20% by weight, preferably 0.000005 to 0.03% by weight with respect to water. .

The hypochlorite used is potassium hypochlorite, calcium hypochlorite, copper hypochlorite,
Examples are sodium hypochlorite and barium hypochlorite. Among these, sodium hypochlorite is particularly preferable and preferably used in terms of handling, price, and effect.

The inorganic acids include hydrochloric acid, nitric acid, sulfuric acid, sulfamic acid and the like, and the organic acids include acetic acid, formic acid, citric acid and the like. Of these inorganic acids or organic acids, hydrochloric acid is particularly preferable and is preferably used from the viewpoints of handling, price and effect.

The method of mixing water with hypochlorite, an inorganic acid and / or an organic acid is not particularly limited, but the hypochlorite and the inorganic acid and / or the organic acid can be mixed at a high concentration. Mixing is not preferable, and as a mixing method, a method of previously mixing water and hypochlorite and then adding an inorganic acid and / or an organic acid, or water and an inorganic acid and / or an organic acid in advance A preferred method is to add hypochlorite after mixing.

[0012]

EXAMPLES Examples of the present invention will be specifically described below.
The present invention is not limited to the embodiments.

Production of oxidizing water: 5.8 g of an aqueous solution of sodium hypochlorite in 15 l of water (concentration of sodium hypochlorite of 1
3.5%), and then 4.4 g of hydrochloric acid (hydrochloric acid concentration 35
%) Was added and mixed to produce oxidized water. The produced oxidizing water was put into 500 ml polybin in small portions, covered with a lid, sealed with a vinyl tape and stored in the dark at 25 ° C., taken out from the polybin and used for the next test.

Example 1 Three test strains: (1) Pseudomonas aeruginosa, (2) Staphy
lococcus aureus 6756A, (3) Escherichia coli ATCC
Each of the Brain Heart Infusion broths (BHI) at 37 ° C. for 24 hours was diluted 1000 times with physiological saline (0.85% NaCl) to give a test bacterial solution. Next, 9.5 ml of oxidizing water was put into a test tube (18 mmφ), 0.5 ml of the above test bacterial solution was added thereto and mixed for 10 seconds or 60 seconds, and then 0.1 ml of each mixed solution was added to standard agar ( PCA) medium was smeared to prepare two smear mediums of 3 kinds of test bacteria. The prepared smear medium was cultured at 37 ° C. for 48 hours, but no colonies of the above-mentioned 3 kinds of bacteria appeared.

Comparative Example 1 A culture test of three test bacteria was carried out in the same manner as in Example 1 except that pure water was used in place of the oxidizing water. The viable cell count of the colonies that appeared after 48 hours of culture in this case was as follows. Type of test bacterium Number of colonies ─────────────────────────────── (1) Pseudomonas aeruginosa 6.0 × 10 ⁴ ( 2) Staphylococcus aureus 6756A 3.1 × 10 ⁴ (3) Escherichia coli ATCC 2.2 × 10 ⁴

As is clear from the results of Example 1 as compared with Comparative Example 1, growth of the above-mentioned three kinds of bacteria was not observed when treated with oxidizing water, and the bactericidal activity of the oxidizing water was confirmed.

Example 2 Using the oxidizing water of the present invention, hand washing was carried out by a dipping method, a wiping method, a washing method and a rubbing method, and the number of general viable bacteria on the palm before and after the hand washing was measured. As a result, in each method, no bacteria were detected after hand washing with oxidizing water, and a remarkable bactericidal effect of oxidizing water was observed. In addition, no skin damage such as hand rash was observed at all, which often occurs when a drug is sterilized by the same method.

[0018]

As is apparent from the above, according to the present invention, it is efficient to simply mix water with hypochlorite, an inorganic acid and / or an organic acid, and the cost is high, such as an electrolytic cell. It is possible to produce oxidative water having excellent bactericidal effect as a sterilizing liquid at a low cost without using any special device by an extremely simple method.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location A61L 2/18 C02F 1/76 A (72) Inventor Jun Hoshino 6-1-1 Shinjuku, Katsushika-ku, Tokyo No. 1 Mitsubishi Gas Chemical Co., Ltd. Tokyo factory

Claims (4)

[Claims] 1. Hypochlorite, hypochlorite, inorganic acid and / or organic acid, relative to water, is 0.005-0.5 hypochlorite.
% By weight and inorganic and / or organic acid 0.000001
Oxidized water obtained by mixing at a ratio of 0.20% by weight. 2. Oxidized water according to claim 1, wherein the hypochlorite is sodium hypochlorite. 3. Oxidized water according to claim 1 or 2, wherein the inorganic acid is hydrochloric acid. 4. The method for producing oxidized water according to claim 1.