JP2003034605A - Composition for sterilization and disinfection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safe, inexpensive and effective composition for sterilization and disinfection. SOLUTION: The safe, inexpensive and effective composition for sterilization and disinfection is a multicomponent solution. The multicomponent solution is prepared by adding more than one selected from hypochlorous acid or its salt into a solution of more than one selected from a group of oxalic acid, citric acid, acetic acid, lactic acid and their sodium, potassium or calcium salts. When compared in a condition of same available chlorine, the multicomponent solution of the invention has better sterilizing and disinfecting effects than conventionally used hypochlorous acid solution. In addition, the hypochlorous solution of the invention is safer, because it does not generate chlorine gas even when the pH of the solution changes.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disinfectant / deodorant composition, and its application fields are food processing, eating out, medical care, fisheries, agriculture, livestock, It includes each field of the environment. [0002] An overview of the prior art relating to chlorine-based disinfectants and deodorants related to the present invention is found in the fields of food processing, eating out, medical care, fisheries, agriculture, livestock, and the environment. It can be said that the disinfectant used in the above is sodium hypochlorite. It is inexpensive and has been approved by the Ministry of Health as a food fungicide. Therefore, its sterilization
The deodorizing machine is also studied in detail. In an aqueous solution of sodium hypochlorite, sterilization and deodorization are carried out by the oxidizing power of effective free chlorine, and the concentration is usually adjusted according to the degree of contamination. In addition, the sterilization
It has been clarified from basic experimental data that it is effective to adjust the hydrogen ion concentration of the system in order to increase the deodorizing effect. Therefore, the hydrogen ion concentration is adjusted using hydrochloric acid. Although the development of the system has attracted attention, how to produce and maintain the target hydrogen ion concentration cheaply and safely is the biggest problem. Among other chlorine-based disinfectant / disinfectant systems, strong acid water and chlorine dioxide are on the market, but their use in the food field is restricted, and the cost is also reduced to sodium hypochlorite. Not reachable. [0003] The sodium hypochlorite-based disinfectant / deodorant, which is most widely accepted in the market, can be used more safely and more in terms of cost as well as the scope of its use. It is an object of the present invention to solve this problem by establishing a technology that can be produced at lower cost and used more effectively. [0004] In order to maximize and utilize the disinfecting and deodorizing effects of sodium hypochlorite, the hydrogen ion concentration of the aqueous sodium hypochlorite solution must be slightly acidic. It is known that it is good to keep it. Since the aqueous solution of sodium hypochlorite is basically alkaline,
Usually, hydrochloric acid or sulfuric acid is used for the acidification. However, when the aqueous solution of sodium hypochlorite is mixed with the above-mentioned acid, if the hydrogen ion concentration becomes 4.2 or less in pH display, the system will generate irritating and highly toxic chlorine gas. There is a risk of doing so. In order to avoid that, a mixing system with a hydrogen ion concentration meter linked to a stirrer to homogenize the hydrogen ion concentration in the system would be required. And this system will, of course, be a costly investment in security. And this is exactly what the inventor has set as the problem to be solved. The means invented by the inventor to solve the above-mentioned problem will be described in detail. It selects one or more of phosphoric acid, oxalic acid, citric acid, acetic acid, lactic acid and their sodium or potassium or calcium salts, and each concentration is in the range of 0.001 mol to 1.5 mol. This is a method in which an aqueous solution is prepared, and hypochlorous acid or a sodium salt, a potassium salt, or a calcium salt thereof is coexisted in the solution in a concentration range of 0.001 mol to 1.5 mol. More specifically,
First, an aqueous solution having a predetermined concentration is prepared using one selected from phosphoric acid, oxalic acid, citric acid, acetic acid, lactic acid and salts thereof.
A predetermined amount of hypochlorous acid or a salt thereof is added to the aqueous solution to produce a desired hypochlorous acid-based disinfectant / deodorant composition. When an aqueous solution having a predetermined concentration is prepared using phosphoric acid, oxalic acid, citric acid, acetic acid, lactic acid, and salts thereof, the hydrogen ion concentration of the resulting aqueous solution is reduced from 4.5 to 4.5. 6.5 phosphoric acid, oxalic acid,
You have to choose the proper one from citric acid, acetic acid, lactic acid and their salts, and determine the concentration. By adding hypochlorous acid or a salt thereof to the aqueous solution, a safe and effective hypochlorous acid-based disinfectant / disinfectant composition can be obtained. Next, the operation of the present invention will be described. phosphoric acid,
Using a solution selected from oxalic acid, citric acid, acetic acid, lactic acid and salts thereof, an aqueous solution having a pH in the range of 4.5 to 6.5 is prepared, and a predetermined amount of hypochlorous acid or a salt thereof is added thereto. When added, the irritating and highly toxic chlorine gas is not generated from the hypochlorous acid compound. This is because, as described above, the pH range in which chlorine gas is generated from the hypochlorous acid-based compound, that is, the pH has not become 4.2 or less. The safety action of the disinfectant / deodorant composition according to the present invention is as described above. Next, it has been found from basic research that the hypochlorous acid compound exhibits its function most effectively depending on the hydrogen ion concentration of the system. That is,
In the case of an aqueous solution of sodium hypochlorite, the disinfection / deodorizing power is greatest when the hydrogen ion concentration of the system is in the range of 4.5 to 6.5 in terms of pH. In the aqueous solution containing the hypochlorous acid compound according to the present invention, the hydrogen ion concentration of the system is kept in a desirable range in relation to the cation and anion concentrations of the compounds in the system. This is the action by which the hypochlorous acid compound can exert its bactericidal and deodorizing power to the maximum.
Of course, for the sterilization and deodorization of foods, only those compounds which are recognized as food additives among the above compounds will be used. Next, the present invention will be described by way of examples. Embodiment 1 FIG. 6.8 g of potassium dihydrogen phosphate crystals were dissolved in 970 ml of distilled water (pH 6.8). The pH of this aqueous solution was 4.7. Make three sets of this aqueous solution of potassium dihydrogen phosphate, each with 10% sodium hypochlorite
After adding 20 ml, 5 ml and 1 ml of the aqueous solution, distilled water was added to make the total amount 1000 ml. PH of these aqueous solutions
Was measured. 20 ml of 10% sodium hypochlorite solution
The pH of the addition was 6.3, the pH of the addition of 5 ml was 5.8, and the pH of the addition of 1 ml was 5.4. It has been clarified that a sodium hypochlorite-based disinfectant / deodorant aqueous solution can be formed in a safe region that does not fall within the pH range in which chlorine gas is generated. Embodiment 2 FIG. 16.9 g of disodium citrate, in which two of the hydrogens of the three carboxyl groups in the citric acid molecule have been replaced by sodium, are distilled water (pH 6.
8) Dissolved in 950 ml. The pH of this aqueous solution is 4.
Nine. In this aqueous solution, 1 of sodium hypochlorite was added.
1 ml of a 0% aqueous solution was added, and distilled water was further added to make the total amount 1000 ml. PH of the aqueous solution (hereinafter referred to as solution A) containing sodium hypochlorite and disodium citrate
Was 5.0. On the other hand, a liquid (hereinafter referred to as liquid B) was prepared by adding 2 ml of a 10% aqueous solution of sodium hypochlorite to 998 ml of distilled water. The pH of the solution B was measured to be 8.5. The bactericidal effect against Bacillus subtilis (spores) having a resistance to the bactericide was measured using the solution A and the solution B. In the test method, a suspension of Bacillus subtilis (spore) was prepared, the number of bacteria contained in the solution was measured by a culture method using an ordinary dish, and a predetermined amount of the bacterial suspension was added to 100 ml of solution A. And solution B and distilled water, and gently stirred at 20 ° C. for 10 minutes.
The number of remaining viable cells was measured by a culture method using an ordinary dish, and the results are shown in Table 1. Table 1 shows that the bactericidal activity of the aqueous sodium hypochlorite solution (solution A) according to the present invention is the conventional one (solution B).
Indicates higher. [Table 1] As shown in the examples, the multi-component aqueous solution containing the hypochlorous acid compound according to the present invention can be used to sterilize / disinfect the hypochlorous acid compound in a conventional manner. It is clear that it exceeds the odor. In addition, including a hypochlorous acid compound,
It was clarified that the production of a multi-component aqueous solution was safe because no chlorine gas was generated.

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[Procedure amendment] [Date of submission] August 7, 2001 (2001.8.7) [Procedure amendment 1] [Document name to be amended] Description [Item name to be amended] Full text [Amendment method] Change [Amendment] Content: [Document name] Description [Title of the invention] Disinfectant / disinfectant composition [Claims] [Claim 1] Oxalic acid, citric acid, acetic acid, lactic acid, hypochlorous acid and sodium or potassium of those acids Alternatively, two or more calcium salts are selected, and hypochlorous acid or a salt thereof is used as one component in an aqueous solution having a concentration of 0.001 mol to 1.5 mol, and another acid or salt is selected. A disinfectant / disinfectant composition comprising a multi-component aqueous solution containing at least one of the following as other components. Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disinfectant / deodorant composition, and its application fields are food processing, eating out, medical care, fisheries, agriculture, livestock, It includes each field of the environment. [0002] An overview of the prior art relating to chlorine-based disinfectants and deodorants related to the present invention is found in the fields of food processing, eating out, medical care, fisheries, agriculture, livestock, and the environment. It can be said that the disinfectant used in the above is sodium hypochlorite. It is inexpensive and has been approved by the Ministry of Health as a food fungicide. Therefore, its sterilization
The deodorizing machine is also studied in detail. In an aqueous solution of sodium hypochlorite, sterilization and deodorization are carried out by the oxidizing power of effective free chlorine, and the concentration is usually adjusted according to the degree of contamination. In addition, the sterilization
It has been clarified from basic experimental data that it is effective to adjust the hydrogen ion concentration of the system in order to increase the deodorizing effect. Therefore, the hydrogen ion concentration is adjusted using hydrochloric acid. Although the development of the system has attracted attention, how to produce and maintain the target hydrogen ion concentration cheaply and safely is the biggest problem. Among other chlorine-based disinfectant / disinfectant systems, strong acid water and chlorine dioxide are on the market, but their use in the food field is restricted, and the cost is also reduced to sodium hypochlorite. Not reachable. [0003] The sodium hypochlorite-based disinfectant / deodorant, which is most widely accepted in the market, can be used more safely and more in terms of cost as well as the scope of its use. It is an object of the present invention to solve this problem by establishing a technology that can be produced at lower cost and used more effectively. [0004] In order to maximize and utilize the disinfecting and deodorizing effects of sodium hypochlorite, the hydrogen ion concentration of the aqueous sodium hypochlorite solution must be slightly acidic. It is known that it is good to keep it. Since the aqueous solution of sodium hypochlorite is basically alkaline,
Usually, hydrochloric acid or sulfuric acid is used for the acidification. However, when the aqueous solution of sodium hypochlorite is mixed with the above-mentioned acid, if the hydrogen ion concentration becomes 4.2 or less in pH display, the system will generate irritating and highly toxic chlorine gas. There is a risk of doing so. In order to avoid that, a mixing system with a hydrogen ion concentration meter linked to a stirrer to homogenize the hydrogen ion concentration in the system would be required. And this system will, of course, be a costly investment in security. And this is exactly what the inventor has set as the problem to be solved. The means invented by the inventor to solve the above-mentioned problem will be described in detail. It selects one or more of oxalic acid, citric acid, acetic acid, lactic acid and their sodium or potassium or calcium salts, and prepares an aqueous solution having a concentration of each in the range of 0.001 mol to 1.5 mol. In this method, hypochlorous acid or its sodium salt, potassium salt or calcium salt coexist therein in a concentration range of 0.001 mol to 1.5 mol. More specifically, first,
An aqueous solution having a predetermined concentration is prepared using one selected from oxalic acid, citric acid, acetic acid, lactic acid and salts thereof. A predetermined amount of hypochlorous acid or a salt thereof is added to the aqueous solution to produce a desired hypochlorous acid-based disinfectant / deodorant composition. When an aqueous solution having a predetermined concentration is prepared by using one selected from oxalic acid, citric acid, acetic acid, lactic acid and salts thereof, the hydrogen ion concentration of the resulting aqueous solution is expressed in terms of pH.
Choose appropriate ones from oxalic acid, citric acid, acetic acid, lactic acid and their salts so that they fall in the range of 5 to 6.5,
Its concentration must be determined. By adding hypochlorous acid or a salt thereof to the aqueous solution, a safe and effective hypochlorous acid-based disinfectant / disinfectant composition can be obtained. Next, the operation of the present invention will be described. oxalic acid,
When an aqueous solution having a pH in the range of 4.5 to 6.5 is prepared using citric acid, acetic acid, lactic acid and a salt thereof and a predetermined amount of hypochlorous acid or a salt thereof is added. Does not generate irritating and highly toxic chlorine gas from the hypochlorous acid compound. As described above, this is the pH at which chlorine gas is generated from hypochlorous acid compounds.
This is because the range, that is, the pH is not less than 4.2. The safety action of the disinfectant / deodorant composition according to the present invention is as described above. Next, it has been found from basic research that the hypochlorous acid compound exhibits its function most effectively depending on the hydrogen ion concentration of the system. That is,
In the case of an aqueous solution of sodium hypochlorite, the disinfection / deodorizing power is greatest when the hydrogen ion concentration of the system is in the range of 4.5 to 6.5 in terms of pH. In the aqueous solution containing the hypochlorous acid compound according to the present invention, the hydrogen ion concentration of the system is kept in a desirable range in relation to the cation and anion concentrations of the compounds in the system. This is the action by which the hypochlorous acid compound can exert its bactericidal and deodorizing power to the maximum.
Of course, for the sterilization and deodorization of foods, only those compounds which are recognized as food additives among the above compounds will be used. Next, the present invention will be described by way of examples. Embodiment 1 FIG. 16.9 g of citric acid disodium salt, in which two of the three carboxyl group hydrogens in the citric acid molecule were replaced by sodium, was mixed with 950 m of distilled water (pH 6.8).
l. The pH of this aqueous solution was 4.9.
To this aqueous solution, 1 ml of a 10% aqueous solution of sodium hypochlorite was added, and distilled water was further added to make a total amount of 1000 ml.
And The pH of the aqueous solution (hereinafter referred to as solution A) containing sodium hypochlorite and disodium citrate was 5.0. On the other hand, a liquid (hereinafter referred to as liquid B) was prepared by adding 2 ml of a 10% aqueous solution of sodium hypochlorite to 998 ml of distilled water. The pH of the solution B was measured to be 8.5. The bactericidal effect against Bacillus subtilis (spores) having a resistance to the bactericide was measured using the solution A and the solution B. In the test method, a suspension of Bacillus subtilis (spore) was prepared, the number of bacteria contained in the solution was measured by a culture method using an ordinary dish, and a predetermined amount of the bacterial suspension was added to 100 ml of solution A. Solution B and distilled water, and gently stirred at 20 ° C. for 10 minutes.
The number of remaining viable cells was measured by a culture method using the above method, and the results are shown in Table 1. Table 1 shows that the aqueous solution of sodium hypochlorite (solution A) according to the present invention has a higher bactericidal activity than the conventional solution (solution B). [Table 1] As shown in the examples, the multi-component aqueous solution containing the hypochlorous acid compound according to the present invention can be used to sterilize / disinfect the hypochlorous acid compound in a conventional manner. It is clear that it exceeds the odor. In addition, including a hypochlorous acid compound,
It was clarified that the production of the multi-component aqueous solution was safe without generation of chlorine gas.

Claims (1)

[Claim 1] Two or more kinds are selected from phosphoric acid, oxalic acid, citric acid, acetic acid, lactic acid, hypochlorous acid, and sodium, potassium or calcium salts of these acids, and each has a concentration of 0 or less. A multi-component aqueous solution containing hypochlorous acid or a salt thereof as one component and one or more other acids or salts as another component in an aqueous solution having a range of 0.001 mol to 1.5 mol. A disinfectant / disinfectant composition comprising: