WO2023039755A1

WO2023039755A1 - Formulation for preparing slightly acidic hypochlorous acid water and method for preparing slightly acidic hypochlorous acid water

Info

Publication number: WO2023039755A1
Application number: PCT/CN2021/118558
Authority: WO
Inventors: 王冬雷; 李迁; 张力; 丁宋红
Original assignee: 卡富环球有限公司; 怡迅（珠海）光电科技有限公司; 怡迅（美国）光电科技有限公司; 雷士照明英国有限公司; 雷士照明日本有限公司
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2023-03-23
Also published as: CN117730170A

Abstract

The present invention provides a formulation for preparing slightly acidic hypochlorous acid water and a method for preparing slightly acidic hypochlorous acid water. The formulation comprises a first component and a second component. The first component comprises sodium chloride; the second component comprises a pH regulator; and the pH regulator is selected from one or more of citric acid, malic acid, succinic acid, malonic acid, phosphoric acid, and boric acid. The formulation in the present application is used as an electrolytic raw material to be electrolyzed to form slightly acidic hypochlorous acid water. The prepared slightly acidic hypochlorous acid water uses hypochlorous acid as the main bactericidal component, and with the same concentration of available chlorine, has a bactericidal effect much better than that of the hypochlorite solution in the prior art. The pH regulators are all solid acids for food, are not volatile, are not irritating to the skin and respiratory tract of the human body, and thus are relatively safe and can meet the needs of household use. Moreover, the acids mentioned above do not affect the production efficiency of available chlorine, and can remain stable in an electrolysis environment, thereby maintaining the safety advantage of food-grade weak acids.

Description

Preparation of slightly acidic hypochlorous acid water preparation and preparation method of slightly acidic hypochlorous acid water

technical field

The invention relates to the technical field of disinfection water, in particular to a preparation for preparing slightly acidic hypochlorous acid water and a preparation method for slightly acidic hypochlorous acid water.

Background technique

Most of the hypochlorous acid disinfectants currently on the market are hypochlorite-based disinfectants, such as sodium hypochlorite. Its available chlorine mainly exists in the form of hypochlorite, and its bactericidal effect is far lower than that of hypochlorous acid molecules under the same available chlorine, and sodium hypochlorite can also cause irritation to human skin and respiratory tract. In recent years, slightly acidic hypochlorous acid water, also known as slightly acidic electrolyzed water, has been gradually recognized as an ideal sterilizing product to replace sodium hypochlorite. It is colorless and odorless, has a strong bactericidal effect, and is safer for the human body.

As early as in the 1990s, Japan's Tanbo Kenjin proposed the percentage relationship between hypochlorous acid and pH value in his publication "Water Purification Technology". Later, Japanese companies also produced slightly acidic hypochlorous acid water with a pH of 4 Between ～7, the concentration of hypochlorous acid in the hypochlorous acid solution accounts for the largest proportion in this interval, and a low effective chlorine concentration can achieve a strong bactericidal effect. At present, the methods of obtaining hypochlorous acid solution are mainly electrolysis method and acid addition method. The electrolysis method is mainly generated by electrolysis of HCl, NaCl and other solutions using a diaphragm method, and the acid addition method is mainly the dilution and mixing of hypochlorite and hydrochloric acid and other acids. generate. The cost of using a diaphragm in the electrolytic method is relatively high, and the use of electrolytic hydrochloric acid is not safe for household use; the acid-adding method still requires consumers to dilute and prepare hypochlorite, and currently commercially available sodium hypochlorite is high in concentration, so it is used It is still possible to cause harm to the human body during the process.

At present, there are also disinfectant water generators without diaphragm electrolytic salt products on the market, such as Korean hypochlorous acid water generators, but the current products only electrolyze to generate sodium hypochlorite, so the disinfection and sterilization effect is relatively poor.

Contents of the invention

The main purpose of the present invention is to provide a preparation method for preparing slightly acidic hypochlorous acid water and slightly acidic hypochlorous acid water, to solve the problem of poor bactericidal effect of hypochlorite disinfectant in the prior art, Irritant to human skin and respiratory tract.

In order to achieve the above object, according to one aspect of the present invention, a preparation for preparing slightly acidic hypochlorous acid water is provided, the preparation includes a first component and a second component, the first component includes sodium chloride; the second The components include a pH regulator, and the pH regulator is selected from one or more of citric acid, malic acid, succinic acid, malonic acid, phosphoric acid and boric acid.

Further, the mass ratio of the above-mentioned sodium chloride to the pH regulator is 1:1˜100:1.

Further, the mass ratio of the above-mentioned sodium chloride to the pH regulator is 1:20˜1:10.

Further, the above-mentioned pH regulator is selected from one or more of citric acid, malic acid, succinic acid, malonic acid, and phosphoric acid.

Further, the above preparation is powder or tablet.

Further, the above preparation also includes a binder, the binder is mixed with the second component to form a solid bond, or the binder is mixed with the first component and the second component to form a solid bond.

Further, in the above-mentioned solid adhesive, the mass content of the binder is 5-15%.

Further, the above binder is selected from one or more of methyl cellulose, hydroxymethyl cellulose, sodium carboxymethyl cellulose, ethyl cellulose, and starch paste.

Further, the above-mentioned solid adhesive is a tablet.

According to another aspect of the present invention, there is provided a method for preparing slightly acidic hypochlorous acid water, the preparation method comprising: electrolyzing water dispersed with any of the above preparations in a diaphragmless electrolyzer to obtain slightly acidic hypochlorous acid water. Chloric acid water.

Further, the above-mentioned preparation method includes: dissolving the first component in the preparation in water to form a waiting electrolyte, electrolyzing the waiting electrolyte in a diaphragmless electrolytic cell to obtain a sodium hypochlorite solution; using a pH regulator to adjust the pH of the sodium hypochlorite solution to 5 to 6.7 to obtain slightly acidic hypochlorous acid water.

Further, the above-mentioned preparation is a powder, and the powder includes a mixture of the first component and the second component. The preparation method includes: dispersing the powder in water to form a waiting electrolyte, and electrolyzing the waiting electrolyte in a diaphragmless electrolyzer to obtain micro Acidic hypochlorous acid water, the available chlorine concentration in slightly acidic hypochlorous acid water is 10-300mg/L.

Further, the above-mentioned preparation is a tablet or powder or also includes a binder, and the binder is mixed with the first component and the second component to form a solid adhesive. The preparation method includes: bonding the tablet or powder or solid The substance is dispersed in water to form a waiting electrolyte, and the waiting electrolyte is electrolyzed in an electrolytic cell without a diaphragm to obtain slightly acidic hypochlorous acid water. The available chlorine concentration in the slightly acidic hypochlorous acid water is 10-300mg/L.

Further, the ratio of the first component to water is 0.1-10g:0.25-2.5L.

Further, the ratio of the above-mentioned first component to water is 0.1-5g:1L.

Further, the pH value of the slightly acidic hypochlorous acid water in the above preparation method is 5-6.

Apply the technical scheme of the present invention, that is, use the preparation of the present application as the electrolysis raw material and then electrolyze to form slightly acidic hypochlorous acid water. The prepared slightly acidic hypochlorous acid water uses hypochlorous acid as the main bactericidal component. The bactericidal effect is much higher than the hypochlorite solution in the prior art; at the same time, the components of the preparation of the slightly acidic hypochlorous acid water in the application, especially the pH regulator, are solid acids for food and do not have volatility. , has no irritation to human skin and respiratory tract, so it is safe and can meet the needs of home use. Moreover, each of the above-mentioned acids does not affect the production efficiency of available chlorine, and can remain stable in the electrolysis environment, thereby maintaining the safety advantage of food-grade weak acids.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below in conjunction with examples.

As analyzed in the background technology of this application, the disinfectant in the prior art mainly uses hypochlorite as the main component of sterilization, which has weak bactericidal ability and is irritating to the skin and respiratory tract of the human body. In order to solve this problem, the present application provides a preparation for preparing slightly acidic hypochlorous acid water and a preparation method of hypochlorous acid water. The application can effectively solve the problems that the disinfectant has poor sterilization effect and is harmful to human body, and can meet the needs of family use.

In a typical implementation of the present application, a preparation for preparing slightly acidic hypochlorous acid water is provided, the preparation includes a first component and a second component, the first component includes sodium chloride; Part includes a pH regulator, and the pH regulator is selected from any one or more of the group consisting of citric acid, malic acid, succinic acid, malonic acid, phosphoric acid and boric acid.

The preparation of the present application is used as the raw material for electrolysis and then electrolyzed to form slightly acidic hypochlorous acid water. The prepared slightly acidic hypochlorous acid water uses hypochlorous acid as the main bactericidal component, and the bactericidal effect at the same available chlorine concentration is much higher than that of the prior art. The hypochlorite solution in; Simultaneously, among the application, prepare the component of the preparation of slightly acidic hypochlorous acid water, especially the pH adjuster is solid acid for food and does not have volatility, does not have stimulation to the skin of human body and respiratory tract Sex, so the security is high, which can meet the needs of family use. Moreover, each of the above-mentioned acids does not affect the production efficiency of available chlorine, and can remain stable in the electrolysis environment, thereby maintaining the safety advantage of food-grade weak acids.

Among the above-mentioned pH regulators, after undergoing the same electrolysis conditions, the amount of boric acid required is significantly higher than that of the other acids after being adjusted to the same pH value, thus resulting in an increase in cost and a longer time required for dissolving boric acid. Efficiency decreases, so it is preferred that the pH regulator is selected from one or more of citric acid, malic acid, succinic acid, malonic acid, and phosphoric acid.

Moreover, although the above-mentioned pH regulators are all solid acids, their performances in practical applications are quite different. Under the same target pH value of slightly acidic hypochlorous acid water, although the immediate available chlorine is similar, the retention performance of available chlorine is different. , wherein the long-term effective chlorine of citric acid is higher, and the retention of available chlorine is better as the pH value increases.

In order for those skilled in the art to more conveniently adjust to the target pH using the formulation of the present application, the mass ratio of the first component to the pH regulator is controlled to be 1:1-100:1, preferably 1:20-1:10.

Since the above-mentioned sodium chloride and the pH regulator are all solid, they can be prepared into tablets or powders. The powders are the state in which each component exists, and can be combined to form the preparation of the present application after each component is packaged independently, or can be individually packaged. The mixing of the components is carried out to ensure that the formulation of the present application is formed, ie the formulation comprises a mixture of the first component and the second component. When making tablets, for example, each component is independently compressed with a tablet machine to obtain a tablet corresponding to each component, and then the tablets are combined and packaged to obtain the preparation of the present application. Of course, it can also be made into a tablet containing a mixture of various components. For example, after mixing the components of the preparation evenly, the tablet can be obtained by pressing the tablet with a tablet machine. In any mixer with a stirrer, control the stirring speed below 50 rev/min, and mix evenly after stirring for 5-10 minutes. The mixed material is called powder. According to the actual demand of customers or specific hypochlorous acid manufacturing, it can be packaged according to the quantity, sold and used by subcontractors. It is not necessary for users to calculate and weigh sodium chloride or acid by themselves, so as to avoid accidents caused by Inappropriate dosage of sodium chloride or acid leads to unsatisfactory bactericidal effect. Or put the mixed materials into the feed hopper of the tablet press machine, start the tablet press machine, and you can get tablets. The preparation in tablet form is convenient for storage and transportation, and prevents misuse of the pH regulator. Powders dissolve faster than tablets.

In order to improve the stability of the tablet, it is preferable that the above-mentioned preparation further includes a binder, and the binder is mixed with the second component of the preparation to form a solid bond or the binder is mixed with the first component and the second component of the preparation. Partially mix to form a solid bond. The solid adhesive can be made into tablets or blocks as required. A binder is used to form the second component into a solid bond, or the first component and the second component are combined to form a solid bond.

In some embodiments, in the solid adhesive, the mass content of the binder is 5-15%. It not only avoids insufficient stability of the solid adhesive caused by too little binder content, but also avoids waste caused by too high binder content and affects the quality and appearance of the slightly acidic hypochlorous acid water.

The binder used in this application is mainly used to bond the second component, or the first component and the second component into a solid adhesive, so as long as it is not combined with the above-mentioned first component, second component Binders that have chemical reactions and do not have toxic effects can be considered for application in this application. In some embodiments, the above-mentioned binders are selected from methyl cellulose, sodium carboxymethyl cellulose, ethyl cellulose, One or more of the starch pastes, the safety of each of the above-mentioned binders is relatively high. However, when it contains a binder, each component can be uniformly mixed by a dry blending method and then compressed with a tablet machine.

In another typical embodiment of the present application, a method for preparing slightly acidic hypochlorous acid water is provided, the above-mentioned preparation method comprising: electrolyzing water dispersed with any of the above-mentioned preparations in a diaphragmless electrolyzer, Obtain slightly acidic hypochlorous acid water.

Compared with the diaphragm electrolysis method, the present application uses an electrolytic cell without a diaphragm for electrolysis, which has low production cost, does not cause chlorine gas to escape during use, and is less harmful to the human body. The prepared slightly acidic hypochlorous acid water takes hypochlorous acid as the main bactericidal component, and the bactericidal effect under the same available chlorine concentration is much higher than that of the hypochlorite solution in the prior art; meanwhile, the slightly acidic hypochlorous acid water prepared in this application The components of the preparation of chloric acid water, especially the pH regulator, are all solid acids for food, which are not volatile, and are not irritating to the skin and respiratory tract of the human body. Therefore, they are relatively safe and can meet the needs of family use. Moreover, the pH regulator in the preparation of the present application can maintain stability during the electrolysis process, maintaining the safety advantage of food-grade solid acid.

In order to facilitate storage and transportation, in some embodiments, the above-mentioned preparation method includes: dissolving the first component in the preparation in water to form a waiting electrolyte, electrolyzing the waiting electrolyte in a diaphragmless electrolytic cell to obtain a sodium hypochlorite solution, at this time The sodium hypochlorite solution is alkaline; use a pH regulator to adjust the pH value of the sodium hypochlorite solution to 5-6.7, preferably to 5-6, to obtain slightly acidic hypochlorous acid water. The above method can carry out the generation of sodium hypochlorite and the adjustment of pH value step by step, so the operation of each stage can be carried out according to different requirements of available chlorine. After electrolysis, adjusting the pH value of the sodium hypochlorite solution to 5-6.7 can make the concentration of hypochlorous acid in the hypochlorous acid solution as large as possible, thereby achieving a strong bactericidal effect. In order to increase the available chlorine content as much as possible under the same electrolysis conditions, the ratio of the first component to water is preferably 0.1-10 g: 0.25-2.5 L, preferably 0.1-5 g: 1 L.

In some embodiments of the present application, the above-mentioned preparation is a tablet or a powder, or the preparation further includes a binder, and the binder is mixed with the first component and the second component to form a solid adhesive. At this time, the above-mentioned preparation method includes: Disperse the tablet or powder or the solid adhesive in water to form a waiting electrolyte, and electrolyze the waiting electrolyte in an electrolytic cell without a diaphragm to obtain slightly acidic hypochlorous acid water, the first component of the solid adhesive and water The ratio is 0.1-10g: 0.25-2.5L, preferably 0.1-5g: 1L, and the available chlorine concentration in the slightly acidic hypochlorous acid water is 10-300mg/L. In some embodiments, the above preparation method uses a pH regulator to adjust the pH value of the sodium hypochlorite solution to 5-6 to obtain slightly acidic hypochlorous acid water.

In this method, the tablet or the solid adhesive contains both the first component and the second component without additionally adding a pH regulator to adjust the pH, which is more convenient to use.

The present application will be described in further detail below in conjunction with specific examples, and these examples should not be construed as limiting the scope of protection claimed in the present application.

The electrolysis in the following examples is carried out in a diaphragmless electrolysis reactor, wherein the electrolysis power is 15W, the anode is a titanium alloy electrode provided with a ruthenium-iridium coating, and the cathode is a titanium alloy electrode.

Example 1

(1) The first component selects 1g NaCl for use, joins it in 1L water, it is electrolyzed without diaphragm, and the effective time of electrolysis is 4min, obtains sodium hypochlorite solution;

(2) the second component selects 150mg citric acid for use, and it is added in the sodium hypochlorite solution that electrolysis obtains in the step (1), obtains hypochlorous acid water disinfectant, and the pH of hypochlorous acid water disinfectant is 5.7 now when testing.

Example 2

(1) The first component selects 2g NaCl for use, joins it in 1L water, it is electrolyzed without diaphragm, and the effective time of electrolysis is 7min, obtains sodium hypochlorite solution;

(2) The second component selects 150mg citric acid for use, and it is added in the sodium hypochlorite solution that electrolysis obtains in the step (1), obtains hypochlorous acid water disinfectant, and the pH of hypochlorous acid water disinfectant is 6.6 when testing.

Example 3

(2) The second component selects 150mg succinic acid for use, and it is added in the sodium hypochlorite solution that electrolysis obtains in the step (1), obtains hypochlorous acid water disinfectant, and the pH of hypochlorous acid water disinfectant is 5.9 when testing.

Example 4

Use 90mg of hydroxymethyl cellulose to make 2g NaCl and 150mg citric acid into a tablet, add the tablet to 1L of water, and electrolyze it without a diaphragm. The effective time of electrolysis is 7 minutes to obtain a hypochlorous acid water disinfectant; test this The pH of the hypochlorous acid water disinfectant is 6.6.

Example 5

(2) second component selects 150mg malonic acid for use, it is added in the sodium hypochlorite solution that electrolysis obtains in the step (1), obtains hypochlorous acid water disinfectant, the pH of hypochlorous acid water disinfectant is 5.5 now when testing.

Example 6

(2) second component selects 150mg phosphoric acid for use, it is added in the sodium hypochlorite solution that electrolysis obtains in the step (1), obtains hypochlorous acid water disinfectant, and the pH of hypochlorous acid water disinfectant is 5.8 now when testing.

Example 7

(2) the second component selects 100mg citric acid for use, and it is added in the sodium hypochlorite solution that electrolysis obtains in the step (1), obtains hypochlorous acid water disinfectant, and the pH of hypochlorous acid water disinfectant is 6.4 now when testing.

Example 8

(1) The first component selects 5g NaCl for use, joins it in 2L water, it is electrolyzed without diaphragm, and the effective time of electrolysis is 7min, obtains sodium hypochlorite solution;

(2) The second component selects 250mg citric acid for use, and it is added in the sodium hypochlorite solution that electrolysis obtains in the step (1), obtains hypochlorous acid water disinfectant, and the pH of hypochlorous acid water disinfectant is 5.0 when testing.

Example 9

Utilize 510mg hydroxymethyl cellulose to make 5g NaCl and 250mg citric acid into a tablet, add the tablet into 1L water, and electrolyze it without diaphragm, and the effective time of electrolysis is 7min; The pH is 5.1.

Example 10

Use 110mg of hydroxymethyl cellulose to make 1g NaCl and 100mg citric acid into a tablet, add the tablet to 1L of water, and electrolyze it without a diaphragm. The effective time of electrolysis is 7 minutes to obtain a hypochlorous acid water disinfectant; test this The pH of the hypochlorous acid water disinfectant is 6.7.

Example 11

Use 120mg of hydroxymethyl cellulose to make 1g NaCl and 150mg citric acid into a tablet, add the tablet to 1L of water, and electrolyze it without a diaphragm. The effective time of electrolysis is 7 minutes to obtain a hypochlorous acid water disinfectant; test this The pH of the hypochlorous acid water disinfectant is 6.2.

Example 12

Use 30mg hydroxymethyl cellulose to make 500mg NaCl and 150mg citric acid into a tablet, add the tablet to 1L of water, and electrolyze it without a diaphragm. The effective time of electrolysis is 7 minutes to obtain a hypochlorous acid water disinfectant; test this The pH of the hypochlorous acid water disinfectant is 6.0.

Example 13

Use 20mg of hydroxymethyl cellulose to make 100mg NaCl and 100mg citric acid into a tablet, add the tablet into 1L of water, and electrolyze it without a diaphragm. The effective time of electrolysis is 7 minutes, and the hypochlorous acid water disinfectant is obtained; test this The pH of the hypochlorous acid water disinfectant is 7.0.

Example 14

(2) The second component selects 70g boric acid for use, and it is added in the sodium hypochlorite solution that electrolysis obtains in the step (1), obtains hypochlorous acid water disinfectant, and the pH of hypochlorous acid water disinfectant is 5.7 when testing.

Comparative example 1

Select 1g NaCl for electrolysis without diaphragm, the effective time of electrolysis is 4min, the available chlorine of the resulting solution is 36mg/L, and the pH is 8.54. At this time, the solution is mainly sodium hypochlorite solution, and the content of hypochlorous acid is only 7.7%. Escherichia coli is sterilized The rate is 71.8%.

The evaluation of the available chlorine in each embodiment and comparative example selects iodine reagent+spectrophotometry to test; Escherichia coli was tested by spraying for the evaluation of the effect, and the specific action time was 5 minutes. The antivirus solution generated was selected to be loaded into the watering can, and the bacteria were tested for instant sterilization. The effects of the above-mentioned embodiments and comparative examples are shown in Table 1.

Table 1

As can be seen from the data of each embodiment and comparative example in the comparison table, the bactericidal ability of the hypochlorous acid water disinfectant of the present application is obviously better than that of the sodium hypochlorite disinfectant. When the pH value is adjusted to 5.7 in Example 14, more boric acid is required, and the dissolution of boric acid takes a long time. And according to the comparison of embodiments 1, 3, 5, 6 and 14, it can be seen that the available chlorine retention of the hypochlorous acid disinfectant obtained by citric acid adjustment is better; according to the comparison of embodiments 9 to 13, it can be seen that, After citric acid adjustment, the higher the pH value, the better the stability of available chlorine.

From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects:

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

A preparation for preparing slightly acidic hypochlorous acid water, characterized in that the preparation includes a first component and a second component, the first component includes sodium chloride; the second component includes a pH regulator, The pH regulator is selected from one or more of citric acid, malic acid, succinic acid, malonic acid, phosphoric acid, and boric acid.
The preparation according to claim 1, characterized in that the mass ratio of the sodium chloride to the pH regulator is 1:1˜100:1.
The preparation according to claim 2, characterized in that the mass ratio of the sodium chloride to the pH regulator is 1:20-1:10.
The preparation according to claim 1, wherein the pH regulator is selected from one or more of citric acid, malic acid, succinic acid, malonic acid, and phosphoric acid.
The preparation according to any one of claims 1 to 4, wherein the preparation is powder or tablet.
The formulation according to any one of claims 1 to 5, further comprising a binder which is mixed with the second component to form a solid bond or the bond A binder mixes with the first component and the second component to form a solid bond.
The preparation according to claim 6, characterized in that, in the solid adhesive, the mass content of the binder is 5-15%.
The preparation according to claim 6, wherein the binder is selected from one of methyl cellulose, hydroxymethyl cellulose, sodium carboxymethyl cellulose, ethyl cellulose, starch paste or Various.
The preparation according to any one of claims 6 to 8, wherein the solid adhesive is a tablet.
A kind of preparation method of slightly acidic hypochlorous acid water, it is characterized in that, described preparation method comprises:

The water dispersed with the preparation described in any one of claims 1 to 9 is electrolyzed in a diaphragmless electrolyzer to obtain the slightly acidic hypochlorous acid water.
The preparation method according to claim 10, wherein the preparation method comprises:

dissolving the first component in the preparation in water to form an electrolytic solution, and electrolyzing the electrolytic solution in an electrolytic cell without a diaphragm to obtain a sodium hypochlorite solution;

Using the pH adjuster to adjust the pH value of the sodium hypochlorite solution to 5-6.7 to obtain the slightly acidic hypochlorous acid water.
The preparation method according to claim 10, wherein the preparation is a powder, the powder comprises a mixture of the first component and the second component, and the preparation method comprises: mixing the powder Dispersed in water to form an electrolytic solution to be electrolyzed, the electrolyzed solution to be electrolyzed in an electrolytic cell without a diaphragm to obtain the slightly acidic hypochlorous acid water, the available chlorine concentration in the slightly acidic hypochlorous acid water is 10 to 300 mg/ L.
The preparation method according to claim 10, characterized in that, the preparation is a tablet or further includes a binder, and the binder is mixed with the first component and the second component to form a solid adhesive. Injection, the preparation method comprises:

The tablet or the solid adhesive is dispersed in water to form an electrolytic solution, and the electrolytic solution is electrolyzed in an electrolytic cell without a diaphragm to obtain the slightly acidic hypochlorous acid water, and the slightly acidic hypochlorous acid water is obtained. The available chlorine concentration in chloric acid water is 10-300mg/L.
The preparation method according to claim 11, 12 or 13, characterized in that the ratio of the first component to water is 0.1-10g: 0.25-2.5L, and/or the ratio of the slightly acidic hypochlorous acid water The pH value is 5-6.
The preparation method according to claim 14, characterized in that the ratio of the first component to water is 0.1-5g:1L.